Sample records for xylene btx asphalt

  1. Superfund innovative technology evaluation (site) program evaluation report for antox BTX water screen (BTX immunoassay)

    SciTech Connect (OSTI)

    Gerlach, R.W.; White, R.J.; O'Leary, N.F.; Van Emon, J.M.

    1993-06-01T23:59:59.000Z

    The results of a demonstration of a portable immunoassay for the detection of benzene, toluene, and xylene(s) (BTX) are described in the report. Seventy-nine field samples were obtained from monitoring wells at several sites with gasoline contaminated ground water. Sample splits were analyzed on-site by the BTX immunoassay and in the laboratory by gas chromatography (GC) using EPA Method 8020. The BTX immunoassay was rapid and simple to use. It performed well in identifying high level contamination and gasoline contaminated samples having BTX concentrations greater than 100 ppb. It did not fully meet the claims of the developer of identifying contamination levels down to 25 ppb BTX. Two field samples determined by GC to have between 25 and 100 ppb BTX failed to be classified correctly by the immunoassay. Results from quality assurance samples with BTX concentrations of 2.5, 25, and 100 ppb also showed that false negative results would be expected at higher than a 5 percent rate when BTX contamination levels were between 25 and 100 ppb. However, for samples with higher BTX levels, the immunoassay gave excellent results. Two field samples yielded false positive results compared to GC values, but these samples showed signs of low-level gasoline contamination.

  2. Assessment of BTX Concentrations Near a Petrol Station Using Diffusive Samplers

    E-Print Network [OSTI]

    Boyer, Edmond

    Assessment of BTX Concentrations Near a Petrol Station Using Diffusive Samplers Norbert GONZALEZ to concentration levels of benzene, toluene and xylenes (BTX) at three different levels of proximity to a petrol polluted area. Keywords: Air quality, population exposure, benzene, service Station, petrol, vapour

  3. Aged asphalt

    E-Print Network [OSTI]

    Martin, Kenneth Lloyd

    1988-01-01T23:59:59.000Z

    Dorchester Asphalts Exxon Asphalts CONCLUSIONS RECOMMENDATIONS LITERATURE CITED APPENDIX 41 42 48 59 70 84 90 93 96 99 103 105 106 A. GEL PERMEATION CHROMATOGRAMS OF TEST ASPHALTS 108 B. FOURIER-TRANSFORM INFRARED SPECTRUMS OF TEST... Apparatus 5. Abson Method Apparatus 6. ASTM D 2171 Apparatus 7. Sample Pellet Die 8. Sample Pellet Holder 21 23 27 29 38 40 9. GPC of Lufkin Exxon AC-20 Extracted by Two Methods . . . . . . . . . . . . . . . . 46 10. GPC of Dickens Exxon AC-20 51...

  4. Asphalt Oxidation Kinetics and Pavement Oxidation Modeling

    E-Print Network [OSTI]

    Jin, Xin

    2012-07-16T23:59:59.000Z

    Most paved roads in the United States are surfaced with asphalt. These asphalt pavements suffer from fatigue cracking and thermal cracking, aggravated by the oxidation and hardening of asphalt. This negative impact of asphalt oxidation on pavement...

  5. Integrated Analysis of Phenology, Traits, and QTL in the Drought Tolerant Sorghum Genotypes BTx642 and RTx7000

    E-Print Network [OSTI]

    Weers, Brock D.

    2012-10-19T23:59:59.000Z

    ................................................................................................... 167 9.1 Allele contrast analysis for root size parameters under 2009 field conditions at marker DG65 in the BTx642 x RTx7000 RIL population .......................................................................................... 195... 9.2 Allele contrast analysis for leaf size parameters under 2010 field conditions at marker DG139 in the BTx642 x RTx7000 RIL population .......................................................................................... 196 9...

  6. asphalt: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    asphalt pavements containing asphalt binder and aggregates. The use of RAP can reduce the cost of construction materials, reduce the amount of waste... Thakur, Jitendra Kumar...

  7. asphalts: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    asphalt pavements containing asphalt binder and aggregates. The use of RAP can reduce the cost of construction materials, reduce the amount of waste... Thakur, Jitendra Kumar...

  8. BBR Asphalt mixture creep test BBR Asphalt mixture creep size effect

    E-Print Network [OSTI]

    Minnesota, University of

    #12;Outline ØBBR Asphalt mixture creep test ØBBR Asphalt mixture creep size effect ØBBR Asphalt Point Bending Test Low temperature 3-point bending creep tests on specimens with three different sizes mixture strength test ØBBR Asphalt binder strength test #12;Asphalt Pavements ØRecent efforts under NCHRP

  9. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded ­ II ­ Asphalt Pavements ­ Effect of Aging ­ Simulations ­ Concluding Remarks #12;3 Objectives Develop) Correspondence Principle based formulation Application: Asphalt concrete pavements (Part II) #12;4 Asphalt

  10. Isobaric vapor-liquid equilibria of p-xylene + o-xylene and m-xylene + o-xylene systems at 6. 66 and 26. 66 kPa

    SciTech Connect (OSTI)

    Llopis, F.J.; Monton, J.B. (Univ. de Valencia (Spain). Dept. de Ingenieria Quimica)

    1994-01-01T23:59:59.000Z

    Vapor-liquid equilibrium data were obtained for systems of o-xylene with p- and m-xylenes at 6.66 and 26.66 kPa. The activity coefficients were found to be thermodynamically consistent. They were equally well correlated with the Margules, Van Laar, Wilson, NRTL, and UNIQUAC equations. The parameters of these equations are given.

  11. Pipe inspection using the BTX-II. Innovative technology summary report

    SciTech Connect (OSTI)

    NONE

    1999-05-01T23:59:59.000Z

    The US Department of Energy (DOE) continually seeks safer and more cost-effective remediation technologies for use in the decontamination and decommissioning (D and D) of nuclear facilities. In several of the buildings at the Fernald Site, there is piping that was used to transport process materials. As the demolition of these buildings occur, disposal of this piping has become a costly issue. Currently, all process piping is cut into ten-foot or less sections, the ends of the piping are wrapped and taped to prevent the release of any potential contaminants into the air, and the piping is placed in roll off boxes for eventual repackaging and shipment to the Nevada Test Site (NTS) for disposal. Alternatives that allow for the onsite disposal of process piping are greatly desired due to the potential for dramatic savings in current offsite disposal costs. No means is currently employed to allow for the adequate inspection of the interior of piping, and consequently, process piping has been assumed to be internally contaminated and thus routinely disposed of at NTS. The BTX-II system incorporates a high-resolution micro color camera with lightheads, cabling, a monitor, and a video recorder. The complete probe is capable of inspecting pipes with an internal diameter (ID) as small as 1.4 inches. By using readily interchangeable lightheads, the same system is capable of inspecting piping up to 24 inches in ID. The original development of the BTX system was for inspection of boiler tubes and small diameter pipes for build-up, pitting, and corrosion. However, the system is well suited for inspecting the interior of most types of piping and other small, confined areas. The report describes the technology, its performance, uses, cost, regulatory and policy issues, and lessons learned.

  12. Life Cycle Assessment of Reclaimed Asphalt Pavement

    E-Print Network [OSTI]

    Minnesota, University of

    Life Cycle Assessment of Reclaimed Asphalt Pavement to Improve Asphalt Pavement Sustainability By Pavement (RAP) Courtesy of http://myconstructionphotos.smugmug.com/ RAP #12;Transport Back to the Plant-melt old binder on the RAP #12;Life Cycle Assessment (LCA) · #12;Asphalt Pavement Life Cycle Road

  13. Enhancing P-xylene selectivity during m-xylene transformation using mildly pre-coked ZSM-5 catalyst

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    been investigated in detail by several workers [1-12]. Modifications of ZSM-5 by various compounds have-xylene theoretically obtainable from these aromatic compounds is very much limited by thermodynamics. Consequently

  14. Asphalt deposition in miscible floods

    E-Print Network [OSTI]

    Hasan, Syed Mir Ahmed

    1964-01-01T23:59:59.000Z

    : Petroleum Engineering ASPHALT DEPOSITION IN MISCIBLE FLOODS A Thesis By SYED MIR AHMED HASAN Approved as to style and content by: (Chairman of Committee) ommittee Member) Committee Member) Head of Department), (Co 'ttee Member) January, f964... Subject: Petroleum Engineering TABLE OF CONTENTS ABS TRAC T. Page 2. INTRODUCTION. 3 DESCRIPTION OF EQUIPMENT AND MATERIALS. . . . . , . 6 4. EXPERIMENTAL PROCEDURE 5. INTERPRETATION AND DISCUSSION OF RESULTS. . . . . . 13 6. CONCLUSIONS. 7...

  15. Winter Performance and Maintenance of Porous Asphalt Pavements

    E-Print Network [OSTI]

    Concrete (HSG-B)Porous Asphalt (HSG-C) #12;Cold Climate Performance Results #12;12 Porous Asphalt SurfaceWinter Performance and Maintenance of Porous Asphalt Pavements Robert M. Roseen, Ph.D., P.E., D impacts for new development and reverse impacts in areas with redevelopment. #12;Porous Asphalt Design

  16. Compatibilizer for crumb rubber modified asphalt

    SciTech Connect (OSTI)

    Labib, M.E. [New Jersey Institute of Technology, Newark, NJ (United States); Memon, G.M.; Chollar, B.H. [Federal Highway Administration, McLean, VA (United States)

    1996-12-31T23:59:59.000Z

    The United States of America discards more than 300 million tires each year, and out of that a large fraction of the tires is dumped into stock piles. This large quantity of tires creates an environmental problem. The use of scrap tires is limited. There is a usage potential in such fields as fuel for combustion and Crumb Rubber-Modified Asphalt binder (CRMA). The use of crumb rubber in modifying asphalt is not a new technique; it is been used since early 1960 by pavement engineers. Crumb rubber is a composite of different blends of natural and synthetic rubber (natural rubber, processing oils, polybutadiene, polystyrene butadiene, and filler). Prior research had concluded that the performance of crumb rubber modified asphalt is asphalt dependent. In some cases it improves the Theological properties and in some cases it degrades the properties of modified asphalt.

  17. Materials characterization of asphalt and polymer modified asphalt 

    E-Print Network [OSTI]

    Paramasivam, Mohan

    1992-01-01T23:59:59.000Z

    specimen mold made of aluminum ? ? ? ? ? ? ? ? ? ? - 28 5. Strain sweep of Santa Maria AC10/AR4000 at 100 rad/sec --- 33 6. Strain sweep of Conoco AC10 at 10 rad/sec ------------- 34 7. Stress relaxation modulus of AAM grade asphalt at 25'C --- 37 8.... The verification of Cox-Merz rule for Santa Maria AC6/AR2000 at 40'C- 9. The master curve of Santa Maria AC6/Muehlstein LDPE shifted to 25'C showing the errors 10. Master curve (G') of Santa Maria AC6 shifted to 25'C ? ? ? ? ? 43 11. Master curve of Santa...

  18. Materials characterization of asphalt and polymer modified asphalt

    E-Print Network [OSTI]

    Paramasivam, Mohan

    1992-01-01T23:59:59.000Z

    specimen mold made of aluminum ? ? ? ? ? ? ? ? ? ? - 28 5. Strain sweep of Santa Maria AC10/AR4000 at 100 rad/sec --- 33 6. Strain sweep of Conoco AC10 at 10 rad/sec ------------- 34 7. Stress relaxation modulus of AAM grade asphalt at 25'C --- 37 8.... The verification of Cox-Merz rule for Santa Maria AC6/AR2000 at 40'C- 9. The master curve of Santa Maria AC6/Muehlstein LDPE shifted to 25'C showing the errors 10. Master curve (G') of Santa Maria AC6 shifted to 25'C ? ? ? ? ? 43 11. Master curve of Santa...

  19. Baytown Xylene Fractionation Energy Reduction using Dynamic Matrix Control (DMC)

    E-Print Network [OSTI]

    Hokanson, D.

    2014-01-01T23:59:59.000Z

    Technology Conference New Orleans, LA. May 20-23, 2014 2Outline • Baytown Chemical Complex • Xylene Fractionation Overview • Dynamic Matrix Control • Results • Benefits/Wrap-Up ESL-IE-14-05-33 Proceedings of the Thrity-Sixth Industrial Energy Technology... Conference New Orleans, LA. May 20-23, 2014 3Baytown Chemical / Refining Complex ExxonMobil Baytown Refining & Chemical Complex • One of world’s largest integrated, most technologically advanced petroleum/petrochemical complexes, in operation since 1919...

  20. Rapid determination of actinides in asphalt samples

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maxwell, Sherrod L.; Culligan, Brian K.; Hutchison, Jay B.

    2014-01-12T23:59:59.000Z

    A new rapid method for the determination of actinides in asphalt samples has been developed that can be used in emergency response situations or for routine analysis If a radiological dispersive device (RDD), Improvised Nuclear Device (IND) or a nuclear accident such as the accident at the Fukushima Nuclear Power Plant in March, 2011 occurs, there will be an urgent need for rapid analyses of many different environmental matrices, including asphalt materials, to support dose mitigation and environmental clean up. The new method for the determination of actinides in asphalt utilizes a rapid furnace step to destroy bitumen and organicsmore »present in the asphalt and sodium hydroxide fusion to digest the remaining sample. Sample preconcentration steps are used to collect the actinides and a new stacked TRU Resin + DGA Resin column method is employed to separate the actinide isotopes in the asphalt samples. The TRU Resin plus DGA Resin separation approach, which allows sequential separation of plutonium, uranium, americium and curium isotopes in asphalt samples, can be applied to soil samples as well.« less

  1. Rapid determination of actinides in asphalt samples

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maxwell, Sherrod L.; Culligan, Brian K.; Hutchison, Jay B.

    2014-01-12T23:59:59.000Z

    A new rapid method for the determination of actinides in asphalt samples has been developed that can be used in emergency response situations or for routine analysis If a radiological dispersive device (RDD), Improvised Nuclear Device (IND) or a nuclear accident such as the accident at the Fukushima Nuclear Power Plant in March, 2011 occurs, there will be an urgent need for rapid analyses of many different environmental matrices, including asphalt materials, to support dose mitigation and environmental clean up. The new method for the determination of actinides in asphalt utilizes a rapid furnace step to destroy bitumen and organics present in the asphalt and sodium hydroxide fusion to digest the remaining sample. Sample preconcentration steps are used to collect the actinides and a new stacked TRU Resin + DGA Resin column method is employed to separate the actinide isotopes in the asphalt samples. The TRU Resin plus DGA Resin separation approach, which allows sequential separation of plutonium, uranium, americium and curium isotopes in asphalt samples, can be applied to soil samples as well.

  2. TECHNICAL POLLUTION PREVENTION GUIDE FOR ASPHALT PREPARATION OPERATIONS

    E-Print Network [OSTI]

    Delivery, Storage and Cold Feed . . . . . . . . . . . . . 12 2.3.2 Liquid Asphalt Delivery, Storage . . . . . . . . . . . . . . . . . . . . . . 4 2 INDUSTRY PROFILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 ASPHALT and Heating . . . . . . . . . . . . 12 2.3.3 Cold Feed Drying and Heating

  3. An investigation of the use of tire rubber in asphalt

    E-Print Network [OSTI]

    Koo, Heamo Lee

    1996-01-01T23:59:59.000Z

    -rubber binder. The selected variables chosen are curing time, curing temperature, rubber content (weight percent), rubber particle size, base asphalt type, and carbonyl area. Results confirmed that the addition of rubber increased the viscosity of the asphalt...

  4. asphalt composition aplicacao: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Warm mix asphalt (WMA) is not a hot mix asphalt (HMA), it's just warm mix The WMA production temperature typically ranges from 100 to 140o C, whereas for HMA it ranges Das,...

  5. Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures

    E-Print Network [OSTI]

    Vasconcelos, Kamilla L.

    2011-08-08T23:59:59.000Z

    cost in highway maintenance and vehicle operations. One key mechanism of how moisture reaches the asphalt-aggregate interface is by its permeation or diffusion through the asphalt binder or mastic. Different techniques are available for diffusion...

  6. Controlling Thermal Properties of Asphalt Concrete and its Multifunctional Applications 

    E-Print Network [OSTI]

    Shi, Xijun

    2014-08-10T23:59:59.000Z

    ) by controlling thermal properties of the construction materials. To change thermal properties of asphalt concrete, expanded polypropylene (EPP) pellet and graphite were selected as the additives and mixed into asphalt concrete. Experimental tests are classified...

  7. Damage analysis in asphalt concrete mixtures based on parameter relationships 

    E-Print Network [OSTI]

    Song, Injun

    2004-11-15T23:59:59.000Z

    Asphalt pavements experience damage due to traffic loading under various environmental conditions. Damage can be caused by viscopl microcracks, fracture due to fatigue cracking, or fracture due to thermal cracking. Asphalt ...

  8. Evaluation of Rexene polymers in hot mixed asphalt concrete 

    E-Print Network [OSTI]

    Rodriguez, Mary Anne Reese

    1991-01-01T23:59:59.000Z

    Committee: Dr. Dallas N. Little The objective of this research was to provide a comprehensive characterization of asphalt binders and paving mixtures modified with four polymers produced by the Rexene Products Company (Odessa, Texas). The four polymers... LITERATURE REVIEW AND INTERPRETATION General Available Asphalt Additives Practical Application of Asphalt Additives Benefit-Costs for Additives Future Outlook for Additives MATERIALS AND TEST METHODS Polymers Asphalt Cements Aggregate Procedure...

  9. Disk-shaped Compact Tension Test for Asphalt Concrete Fracture

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Disk-shaped Compact Tension Test for Asphalt Concrete Fracture by M.P.Wagoner, W.G. Buttlar and G geometry is the ability to test cylindrical cores obtained from in-place asphalt concrete pavements finalizing the specimen geometry, a typical asphalt concrete surface mixture was tested at various

  10. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded ­ Verification ­ Concluding Remarks Part ­ II (Companion presentation) ­ Asphalt Pavements ­ Effect of Aging: Asphalt concrete pavements (Part II) E1 E2 E3 Eh 1 2 3 h #12;Graded Finite Elements Graded Elements

  11. What's the future for rubberized asphalt

    SciTech Connect (OSTI)

    Not Available

    1991-04-01T23:59:59.000Z

    This article describes the debate over the use of rubberized asphalt for highway surfacing. The Department of Transportation claims that the process is too costly; that it presents potential air pollution, safety and health problems. They also claim that there is a lack of understanding between rubber and asphalt cement and of the recyclability of the product. The Legislative Commission on Solid Waste Management claims that the mixture performs as well or better than conventional asphalt at reduced thicknesses. In addition, there could be savings of local funds currently expended for regulation of tire dumps, fire-fighting and clean-up, vector control and scrap tire disposal costs ranging from $.50 to $2.00 per tire.

  12. The potential use of tar sand bitumen as paving asphalt

    SciTech Connect (OSTI)

    Petersen, J.C.

    1988-01-01T23:59:59.000Z

    In this paper several research reports describing the preparation of potential paving asphalts from tar sand bitumen are reviewed and the results of the studies compared. The tar sand asphalts described in the studies were prepared from 1) hot water-recovered bitumen from deposits near San Luis Obispo, California (Edna deposits), and deposits near Vernal and Sunnyside, Utah; and 2) bitumen recovered from the Northwest Asphalt Ridge deposits near Vernal, Utah, by both in situ steamflood and in situ combustion recovery processes. Important properties of the tar sand asphalts compare favorably with those of specification petroleum asphalts. Laboratory data suggest that some tar sand asphalts may have superior aging characteristics and produce more water-resistant paving mixtures than typical petroleum asphalts.

  13. The potential use of tar sand bitumen as paving asphalt

    SciTech Connect (OSTI)

    Petersen, J.C.

    1987-01-01T23:59:59.000Z

    The properties of several tar sand asphalts prepared in past studies by several different investigators were compared with each other and with the properties of petroleum asphalts. These results were reviewed and discussed with regard to the potential use of tar sand bitumen in pavement applications. The data show that tar sand bitumen has good potential for use in highway pavements that meet today's performance specifications. No deficiencies in the tar sand asphalts were found that would be expected to seriously affect performance. On the other hand, the data indicate that some tar sand asphalts may have superior aging characteristics, being relatively resistant to oxidative age hardening compared with typical petroleum asphalts. Asphalt-aggregate mixtures prepared using two tar sand asphalts also showed acceptable strength properties and excellent resistance to moisture-induced damage.

  14. Evaluation of polyethylene-modified asphalt blends

    E-Print Network [OSTI]

    Consuegra Granger, Fernando

    1990-01-01T23:59:59.000Z

    aggregate and asphalt modified with LDPE (binder contents of 4. 8%%u and 5. 87'). 42 Table 9. Summary of statistical parameters derived from IDT testing on crushed granite mixtures bound with AC-20 + LDPE (4. 8%, and 5. 8/ binder). 46 Table 10. Summary... of creep to rupture data for crushed granite mixtures. 71 Table 11. Summary of the results of IDT repeated load fatigue testing of river gravel mixtures bound with Texaco asphalt: AC- 10, AC-10 + LDPE and AC-20. Table 12. K, ' and n, values of river...

  15. Detection of Benzene, Toluene, Ethyl Benzene, and Xylenes (BTEX) Using Toluene Dioxygenase-Peroxidase Coupling Reactions

    E-Print Network [OSTI]

    Chen, Wilfred

    Detection of Benzene, Toluene, Ethyl Benzene, and Xylenes (BTEX) Using Toluene Dioxygenase, whole-cell bioassay for the detection of bioavailable benzene, toluene, ethyl benzene, and xylenes (BTEX of the response obtained from the blank) of 10, 10, 20, and 50 µM was observed for benzene, toluene, ethyl benzene

  16. Modeling Xylene Reactions over ZSM-5 Zeolite in a Riser Simulator: 1,3 versus 1,2-Methyl Shift

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    -xylene p-xylene). The rate constants and activation energies are obtained from simplified kinetic models include solvent use, manufacture of di- paraxylene and herbicides. Total U.S. consumption of p

  17. Xylene Transformation over USY Zeolite: An Experimental and Kinetic Study Iliyas, A. and Al-Khattaf, S.*

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    Xylene Transformation over USY Zeolite: An Experimental and Kinetic Study Iliyas, A. and Al, and reactant type) on the selectivity of xylene transformation has been carried out over USY zeolite. Initial, mechanistic kinetic models, developed from the transformation of each xylene isomers. The parameters optimized

  18. The effect of asphalt deposition on recovery of oil by a pentane slug

    E-Print Network [OSTI]

    Bhagia, Nanik S

    1965-01-01T23:59:59.000Z

    ":ty reduction increases, in general, with the increase in amount of, asphalt contained ir the oil. The increases in recovery at breakthrough due to asphalt deposition were noted for four asphaltic crude oils and were compared to those of asphalt-free refined... substantial range, the gain in recovery at breakthrough of asphaltic oils over refined oils of the same viscosity increases with increase in size of slug used. This is attributed to more favorable mobility ratios resulting from asphalt deposition during...

  19. Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties using a FunctionallyDependent Properties using a Functionally

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and TemperatureAsphalt Pavement Aging and Temperature Dependent Properties Analysis Time Integration Analysis Application Examples: Asphalt Pavement Summary and Conclusions #12) ­ Large fraction produced as hot-mix asphalt (HMA) ­ Most common form of pavement surfacing material (96

  20. Investigation of Noise and Durability Performance Trends for Asphaltic Pavement Surface Types: Three-Year Results

    E-Print Network [OSTI]

    Lu, Qing; Kohler, Erwin R.; Harvey, John T; Ongel, Aybike

    2009-01-01T23:59:59.000Z

    Trends for Asphalt Pavement Surface Types: First- andResults. University of California Pavement Research Center,Trends for Asphaltic Pavement Surface Types: First- and

  1. A novel technique for the production of cool colored concrete tile and asphalt shingle roofing products

    E-Print Network [OSTI]

    Levinson, Ronnen

    2010-01-01T23:59:59.000Z

    for providing concrete tiles, and Lou Hahn of GAF-Elk forof cool colored concrete tile and asphalt shingle roofingsolar-reflective nonwhite concrete tile and asphalt shingle

  2. Predicting the fatigue life of asphalt concrete overlay systems

    E-Print Network [OSTI]

    Germann, Frederick P

    1979-01-01T23:59:59.000Z

    ON CRACK GROWTH IN VISCOELASTIC MATERIALS C'HAPTER V - STATE OF THE ART Effect of Mix Variables on Fatigue and Cracking Resistance in Asphalt Concrete Pavements . Field Performance of Asphalt Overlays with Fabric Summary CHAPTER VI ? MATERIALS... LIFE OF AN ASPHALT OVERLAY CHAPTER X - CONCLUSIONS AND RECOMMENDATIONS REFERENCES APPENDIX A. CRACK TIP STRESS ANALYSIS APPENDIX B. CONSTRUCTION OF THE MASTER RESILIENT MODULUS AND MASTER CREEP COMPLIANCE CURVES APPENDIX C. CRACK GROWTH RATES, da...

  3. Microstructural Characterization of Material Properties and Damage in Asphalt Composites

    E-Print Network [OSTI]

    Mohammad Khorasani, Sara

    2013-05-03T23:59:59.000Z

    MICROSTRUCTURAL CHARACTERIZATION OF MATERIAL PROPERTIES AND DAMAGE IN ASPHALT COMPOSITES A Thesis by SARA MOHAMMAD KHORASANI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... Engineering Copyright 2013 Sara Mohammad Khorasani ii ABSTRACT Asphalt composites are used to construct 90% of roads in the United States. These composites consist of asphalt binder, which is a product of the refinery process of oil, aggregates...

  4. asphalt technology test: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and evaluated its performance when used in split mastic asphalt (SMA) mixture using Marshall Characteristic and dynamic charateristics (resilient modulus). As many as 90...

  5. anionic emulsified asphalt: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to Volucm Change... Gandhi, Poduru Mohandas Karamchand 1966-01-01 15 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization Websites...

  6. asphalt rock: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Corrections to Volucm Change... Gandhi, Poduru Mohandas Karamchand 1966-01-01 17 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  7. asphaltic sand: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Corrections to Volucm Change... Gandhi, Poduru Mohandas Karamchand 1966-01-01 19 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  8. asphalt concrete overlays: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    experimental results for concrete containing virgin limestone Paulino, Glaucio H. 71 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  9. asphalt overlay design: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    these overlay networks. Routing and search in these overlay ... Cheng, Bow-Nan 69 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  10. asphalt binder extraction: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Corrections to Volucm Change... Gandhi, Poduru Mohandas Karamchand 1966-01-01 43 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  11. Full-Depth Pavement Reclamation with Foamed Asphalt: Final Report

    E-Print Network [OSTI]

    Jones, David; Fu, P.; Harvey, John T; Halles, F.

    2008-01-01T23:59:59.000Z

    University of California Pavement Research Center. (WP-2005-8 th Conference on Asphalt Pavements for Southern Africa (International Journal of Pavement Engineering, Vol 8, No

  12. asphalt concrete bases: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    large amounts of PS wastes in civil engineering constructions. Key words: Asphalt surfaces Disposable dishes Polystyrene (PS) Wastes Environment A. Akbari Motlagh; A....

  13. asphalt concrete soil: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    large amounts of PS wastes in civil engineering constructions. Key words: Asphalt surfaces Disposable dishes Polystyrene (PS) Wastes Environment A. Akbari Motlagh; A....

  14. Compositional evaluation of asphalt binder recycling agents

    E-Print Network [OSTI]

    Madrid, Richard Charles

    1997-01-01T23:59:59.000Z

    from: Exxon Research and Engineering Company, The National Consortium for Graduate Degrees for Minorities in Engineering and Science, Inc. Fellowship (GEM), and the DOW Technical Fellowship is greatly appreciated. I thank Sophie and Ignacio Madrid... for Recycled Blends . . . . . Asphaltic Materials. . 54 58 63 69 V-2 V-3 V-4 V-5 V-6 V-7 Fina DMO and Exxon Tank Compositions and Viscosities. . . . Blend Compositions and Viscosities...

  15. Xylenes Reactions and Diffusions in ZSM-5 Zeolite based Catalyst S. Al-Khattaf*

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    a great challenge to both the academic field and petrochemical industry. However, the introduction of ZSM-5 for xylene transformation process by Mobil workers in the early 1970s represented a clear

  16. Rheological Investigation of the Influence of Acrylate Polymers on the Modification of Asphalt

    E-Print Network [OSTI]

    Hussein, Ibnelwaleed A.

    and superior ACM properties when blended with the high asphaltenes Arabian asphalt. © 2006 Wiley Periodicals

  17. Recycled rubber, aggregate, and filler in asphalt paving mixtures. Transportation research record

    SciTech Connect (OSTI)

    NONE

    1996-12-31T23:59:59.000Z

    ;Contents(Partial): Evaluation Systems for Crumb Rubber Modified Binders and Mixtures; Hot Mix Asphalt Rubber Applications in Virginia; Evaluation of Pyrolized Carbon Black from Scrap Tires as Additive in Hot Mix Asphalt; Use of Scrap Tire Chips in Asphaltic Membrane; Effects of Mineral Fillers on Properties of Stone Matrix Asphalt Mixtures; and Quantitative Analysis of Aggregate Based on Hough Transform.

  18. Field Manual for Crack Sealing in Asphalt Pavements

    E-Print Network [OSTI]

    Texas at Austin, University of

    Field Manual for Crack Sealing in Asphalt Pavements Yetkin Yildirim, Ahmed Qatan, and Jorge Prozzi January 2006 3208RedRiver Austin,TX78705 #12;Dr. Yetkin Yildirim, P.E. Director Texas Pavement for Crack Sealing in Asphalt Pavements #12;Performing Organization: Center for Transportation Research

  19. Recycling asphalt overview of more than 25 years of use

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Recycling asphalt overview of more than 25 years of use in France Y. Brosseaud ­ LCPC hal with ring for recycling ­ Average rate with high proportion : 30 to 50% ­ Used of rejuvenators (soft oil,version1-20May2011 #12;4 Hot recycling asphalt on mixing plant Recycling in place in hot or cold

  20. Relationship Between Surface Free Energy and Total Work of Fracture of Asphalt Binder and Asphalt Binder-Aggregate Interfaces 

    E-Print Network [OSTI]

    Howson, Jonathan Embrey

    2012-10-19T23:59:59.000Z

    is the surface free energy of the asphalt binder and the aggregate. Surface free energy, which is a thermodynamic material property, is directly related to the adhesive bond energy between the asphalt binder and the aggregate as well as the cohesive bond energy...

  1. Relationship Between Surface Free Energy and Total Work of Fracture of Asphalt Binder and Asphalt Binder-Aggregate Interfaces

    E-Print Network [OSTI]

    Howson, Jonathan Embrey

    2012-10-19T23:59:59.000Z

    is the surface free energy of the asphalt binder and the aggregate. Surface free energy, which is a thermodynamic material property, is directly related to the adhesive bond energy between the asphalt binder and the aggregate as well as the cohesive bond energy...

  2. Isobaric vapor-liquid equilibria of ethylbenzene + m-xylene and ethylbenzene + o-xylene systems at 6. 66 and 26. 66 kPa

    SciTech Connect (OSTI)

    Monton, J.B.; Llopis, F.J. (Univ. de Valencia (Spain). Dept. de Ingenieria Quimica)

    1994-01-01T23:59:59.000Z

    Vapor-liquid equilibrium data were obtained for systems of ethylbenzene with m- and o-xylenes at 6.66 and 26.66 kPa. The activity coefficients were found to be thermodynamically consistent. They were equally well correlated with the Margules, Van Laar, Wilson, NRTL, and UNIQUAC equations. The parameters of these equations are given.

  3. Improvements to a Transport Model of Asphalt Binder Oxidation in Pavements: Pavement Temperature Modeling, Oxygen Diffusivity in Asphalt Binders and Mastics, and Pavement Air Void Characterization

    E-Print Network [OSTI]

    Han, Rongbin

    2012-07-16T23:59:59.000Z

    Although evidence is mounting that asphalt binder oxidizes in pavements, and that oxidation and subsequent hardening of asphalt binder has a profound effect on pavement durability, important implementation issues remain to be better understood...

  4. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded Viscoelastic Model, Part-II: Applications

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded simulation of functionally graded viscoelastic properties in asphalt concrete pavements. The techniques properties. A full-depth asphalt concrete pavement has been simulated to demonstrate the applicability

  5. The curing of asphalt with rubber and its effect on the physical and chemical properties of asphalt-rubber binders

    E-Print Network [OSTI]

    Chun, Jay Sung

    1995-01-01T23:59:59.000Z

    10% TG-40 and 90% Exxon AC-5. 105 B-1 Molecular Size Distribution of Rubber in Asphalt 5% TG-40 and 95% Fina AC-10. . . 123 B-2 Molecular Size Distribution of Rubber in Asphalt 10% TG-40 and 90% Fina AC-10. . 124 xlv FIGURE B-3 Molecular Size.... 0 Frequency (rad/s) 10. 0 100. 0 Figure III-2: Effect of Frequency on Viscosity Measurements Fina AC-10 Tank Asphalt 2500 2000 0 a 1500 1000 o 0 0 0 0 o o 0 0 0 0 0 0 0 o 0 Fina AC-10 with 5% TG-40 mesh rubber Cured at 375 F and 500...

  6. asphalt emulsions: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 21 Life Cycle Assessment of Reclaimed Asphalt Pavement Energy Storage, Conversion and Utilization...

  7. Characterization of Fatigue Cracking and Healing of Asphalt Mixtures

    E-Print Network [OSTI]

    Luo, Xue

    2012-07-16T23:59:59.000Z

    mixtures using an energy-based mechanistic approach. A controlled-strain repeated direct tension (RDT) test is selected to generate both fatigue cracking and permanent deformation in an asphalt mixture specimen. Fatigue cracking is separated from...

  8. Viscoelastic{Viscoplastic Damage Model for Asphalt Concrete

    E-Print Network [OSTI]

    Graham, Michael A.

    2010-10-12T23:59:59.000Z

    This thesis presents a continuum model for asphalt concrete incorporating non- linear viscoelasticity, viscoplasticity, mechanically-induced damage and moisture- induced damage. The Schapery single-integral viscoelastic model describes the nonlinear...

  9. A thermodynamic approach for compaction of asphaltic composites

    E-Print Network [OSTI]

    Koneru, Saradhi

    2009-05-15T23:59:59.000Z

    and Focus of Current Work . . . . . . . . . . . . . . 2 B. Outline of the Thesis . . . . . . . . . . . . . . . . . . . . . 3 C. Notations Used . . . . . . . . . . . . . . . . . . . . . . . . 4 II LITERATURE REVIEW... . . . . . . . . . . . . . . . . 8 b. Asphalt Binder . . . . . . . . . . . . . . . . . . . 8 C. Compaction Equipment . . . . . . . . . . . . . . . . . . . . 9 1. Field Compaction Equipment . . . . . . . . . . . . . . 9 a. Static Steel Wheel Rollers . . . . . . . . . . . . . 9 b...

  10. asphaltic pavements microsurfacing: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    service have been... Lau, Chee Keung 1991-01-01 14 A utility evaluation of nondestructive testing devices used on asphalt concrete pavements Texas A&M University - TxSpace...

  11. asphalt pavement cracking: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    service have been... Lau, Chee Keung 1991-01-01 16 A utility evaluation of nondestructive testing devices used on asphalt concrete pavements Texas A&M University - TxSpace...

  12. asphalt concrete pavement: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    this thesis. It included the following tasks: investigation of a testing and grading system for grading asphalt binder residues... Hoyt, Denise 2012-07-16 8 Full-Depth Pavement...

  13. asphalt pavement rap: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    service have been... Lau, Chee Keung 1991-01-01 14 A utility evaluation of nondestructive testing devices used on asphalt concrete pavements Texas A&M University - TxSpace...

  14. asphaltic concrete pavement: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    this thesis. It included the following tasks: investigation of a testing and grading system for grading asphalt binder residues... Hoyt, Denise 2012-07-16 8 Full-Depth Pavement...

  15. asphalt concrete pavements: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    this thesis. It included the following tasks: investigation of a testing and grading system for grading asphalt binder residues... Hoyt, Denise 2012-07-16 8 Full-Depth Pavement...

  16. asphaltic concrete pavements: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    this thesis. It included the following tasks: investigation of a testing and grading system for grading asphalt binder residues... Hoyt, Denise 2012-07-16 8 Full-Depth Pavement...

  17. asphalt pavements: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    service have been... Lau, Chee Keung 1991-01-01 14 A utility evaluation of nondestructive testing devices used on asphalt concrete pavements Texas A&M University - TxSpace...

  18. Measurements of moisture suction in hot mix asphalt mixes 

    E-Print Network [OSTI]

    Kassem, Emad Abdel-Rahman

    2006-10-30T23:59:59.000Z

    with different bond energies and exhibited different field performance in terms of resistance to moisture damage. The suction measurements in sand asphalt specimens were used to calculate the moisture diffusion coefficient. The results revealed that water...

  19. Moisture Diffusion in Asphalt Binders and Fine Aggregate Mixtures 

    E-Print Network [OSTI]

    Vasconcelos, Kamilla L.

    2011-08-08T23:59:59.000Z

    coefficient measurement of a wide variety of polymersolvent systems. For the asphalt-water system studied, the focus is on two techniques: (i) Fourier Transform Infrared (FTIR)-Attenuated Total Reflectance (ATR) spectrometry and (ii) Gravimetric Sorption...

  20. Imparting Electrical Conductivity into Asphalt Composites Using Graphite 

    E-Print Network [OSTI]

    Baranikumar, Aishwarya

    2013-07-09T23:59:59.000Z

    publications showed the potential of graphite in mitigating the sudden transition. The study presented herein investigates possibility of precisely controlling the electrical conductivity of asphalt concrete only by adding filler size graphite powder. Nine...

  1. asphalt concrete performance: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Robert L. 2014-01-01 23 Establishing material properties for thin asphalt concrete surfaces on granular bases Texas A&M University - TxSpace Summary: of MASTER OF SCIENCE...

  2. Study of properties of sand asphalt using a torsional rheometer 

    E-Print Network [OSTI]

    Kasula, Lavan Kumar Reddy

    2004-11-15T23:59:59.000Z

    The modeling of Sand Asphalt and experiments to measure their rheological properties are of vital concern to many industrial processes especially highway and roadway pavement construction industry. A variety of hot mix ...

  3. Use of VFDs on Asphalt Plant Induced Draft Fans

    E-Print Network [OSTI]

    Anderson, G. R.; Case, P. L.; Lowery, J.

    2005-01-01T23:59:59.000Z

    Studies of 10 asphalt plants in the Intermountain Region have identified average ID fan energy savings of 68% by controlling airflow using Variable Frequency Drives (VFDs) on the fan motors in place of damper control (inlet or outlet). Average...

  4. Methods for the synthesis and polymerization of .alpha.,.alpha.'-dihalo-p-xylenes

    DOE Patents [OSTI]

    Ferraris, John P. (Coppell, TX); Neef, Charles J. (Garland, TX)

    2002-07-30T23:59:59.000Z

    The present invention describes an improved method for the polymerization of .alpha.,.alpha.-dihalo-p-xylene's such as the .alpha.,.alpha.'-dihalo-2-methoxy-5-(2-ethylhexyloxy)-xylene's. The procedure for synthesis is based on the specific order of addition of reagents and the use of an anionic initiator that allows control of the molecular weight of the polymer. The molecular weight control allows processability of the polymer which is important for its utility in applications including in light-emitting-diodes, field effect transistors and photovoltaic devices.

  5. Fiber reinforcement of asphalt concrete using cow manure

    E-Print Network [OSTI]

    Bakar, Mohammed Abu

    1976-01-01T23:59:59.000Z

    . Specimens were made according to the Marshall Method of Mixture Design and tested for 1) Marshall Stability 2) Hveem Stability and 3) Hater Susceptibil- ity. Test results indicated that 4. 4 percent cow manure by volume of rhe total aggregate when used... Voids in Mineral Aggregate 11 LIST OF FIGURES Figures Page l. 2 l. 3 1. 4 1. 5 1. 6 Determination of Optimum Asphalt Content by the Marshall Method Determination of Optimum Asphalt Content by the Marshall Method Determination of Optimum...

  6. Characterization of road asphalt using Gel Permeation Chromatography

    E-Print Network [OSTI]

    Donaldson, Guy Randal

    1987-01-01T23:59:59.000Z

    inconsistent and inconsistent. Six were consistent, three were slightly inconsist nt, and three were inconsistent. To study the relationship between GPC and performance, samples from test pavements at three locations were obtained. Both original asphalts... Columns/Toluene/100 Nicroliters/ 7X 3 ' 2. Reproducibility of the Standard Asphalt in THF . ~ . . ~ . ~ . . . 500 and 50 Angstrom Columns/Toluene/100 Nicroliters/ 7X 19 3. 3. Differences in Refractive Index Detector Response. Exxon AC-10/Dumas Tank...

  7. Fatigue Resistance of Asphalt Mixtures Affected by Water Vapor Movement

    E-Print Network [OSTI]

    Tong, Yunwei

    2013-11-08T23:59:59.000Z

    aggregate contact due to dust particles on the aggregate surface. The rupture may occur because of the construction loads and operating traffic during construction, or could be environmentally induced by freeze-thaw cycling. Once a break in the film... design, environment and traffic, can be defined as progressive degradation of asphalt mixture material due to the presence of water. The occurrence of moisture damage in asphalt material is a rather complex phenomenon, which involves chemical, physical...

  8. Investigation of Conditions for Moisture Damage in Asphalt Concrete and Appropriate Laboratory Test Methods

    E-Print Network [OSTI]

    Lu, Qing

    2005-01-01T23:59:59.000Z

    of Asphalt Concrete-Physical Testing. ” Final Report, #930-of Asphalt Concrete: Chemical Testing. ” Alabama Highwayconcrete mixes, it is preferred to use a mix that would have good moisture resistance under laboratory testing

  9. Investigation of Conditions for Moisture Damage in Asphalt Concrete and Appropriate Laboratory Test Methods

    E-Print Network [OSTI]

    Harvey, John T; Lu, Qing

    2005-01-01T23:59:59.000Z

    of Asphalt Concrete-Physical Testing. ” Final Report no.of Asphalt Concrete: Chemical Testing. ” Alabama Highwayconcrete mixes, it is preferable to use a mix that would have good moisture resistance under laboratory testing

  10. A Coupled Micromechanical Model of Moisture-Induced Damage in Asphalt Mixtures: Formulation and Applications 

    E-Print Network [OSTI]

    Caro Spinel, Silvia

    2011-02-22T23:59:59.000Z

    The deleterious effect of moisture on the structural integrity of asphalt mixtures has been recognized as one of the main causes of early deterioration of asphalt pavements. This phenomenon, usually referred to as moisture damage, is defined...

  11. Experimental Study on Geocell-Reinforced Recycled Asphalt Pavement (RAP) Bases under Static and Cyclic Loading

    E-Print Network [OSTI]

    Thakur, Jitendra Kumar

    2011-01-13T23:59:59.000Z

    Recycled Asphalt Pavement (RAP) is a removed and reprocessed pavement material containing asphalt and aggregates which can be used as a base course material for pavement applications. Geocells are a three-dimensional interconnected honeycomb type...

  12. Asphalt compositions containing spurted polyolefin fibers with improved dispersibility in hydrocarbons

    SciTech Connect (OSTI)

    Jabloner, H.

    1987-07-07T23:59:59.000Z

    A cutback asphalt composition is described comprising asphalt and a hydrocarbon solvent. The improvement composition comprises a water-dispersible spurted polyolefin pulp having precipitated a natural rubber or synthetic elastomer that is swellable in hydrocarbon solvents.

  13. E-Print Network 3.0 - asphalt mix design Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and Environmental Engineering, Arizona State University Collection: Engineering 35 Bi Oil i A h ltBio-Oil in Asphalt ApplicationsApplications Summary: tons of hot mix asphalt...

  14. Evaluation of the filler effects on fatique cracking and permanent deformation of asphalt concrete mixtures 

    E-Print Network [OSTI]

    Izzo, Richard P

    1997-01-01T23:59:59.000Z

    The addition of hydrated lime to asphalt has shown to be beneficial with an improvement in the Theological properties of the binder, as well as resistance to permanent deformation (rutting) and fatigue cracking of asphalt concrete mixtures...

  15. Evaluation of the filler effects on fatique cracking and permanent deformation of asphalt concrete mixtures

    E-Print Network [OSTI]

    Izzo, Richard P

    1997-01-01T23:59:59.000Z

    The addition of hydrated lime to asphalt has shown to be beneficial with an improvement in the Theological properties of the binder, as well as resistance to permanent deformation (rutting) and fatigue cracking of asphalt concrete mixtures...

  16. Quaternary liquid-liquid equilibrium of n-heptane-toluene-o-xylene-propylene carbonate

    SciTech Connect (OSTI)

    Salem, A.B.S.H.; Hamad, E.Z.; Al-Naafa, M.A. (King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia). Chemical Engineering Dept.)

    1994-03-01T23:59:59.000Z

    Liquid-liquid equilibrium data for the system n-heptane/toluene/o-xylene/propylene carbonate were obtained at 25 OC. Experimental tie line data were measured by gas chromatographic analysis. The UNIQUAC and NRTL models were used to predict the quaternary data from the corresponding ternary data. Agreement between the predictions and the experimental data was satisfactory.

  17. Development of asphalts and pavements using recycled tire rubber. Phase 1: technical feasibility. Final report

    SciTech Connect (OSTI)

    Bullin, J.A.; Davison, R.R.; Glover, C.J. [and others

    1998-01-01T23:59:59.000Z

    This report documents the technical progress made on the development of asphalts and pavements using recycled tire rubber.

  18. A study of the mixing viscosity of asphalt in hot-mix production

    E-Print Network [OSTI]

    Khan, Md. Musharraf Hossain

    1961-01-01T23:59:59.000Z

    Gravity and Absorption of Aggregates. 36 Sieve Analysis of Combined Aggregates 37 Centrifuge Kerosene Equivalent Test Data for Estimated Optimum Asphalt Content . 38 Test Data on Molded Specimens for Optimum Asphalt Content 39 XIII . Test Data... there is available to be filled with asphalt. The Centrifuge Kerosene Equivalent (CKE) Test was performed to 11 determine the estimated optimum asphalt content as a percentage of the 10 The American Association of State Highway Officials, "Standard...

  19. Asphalt Roofing Shingles Into Energy Project Summary Report

    SciTech Connect (OSTI)

    Jameson, Rex, PE

    2008-04-28T23:59:59.000Z

    Based on a widely cited September, 1999 report by the Vermont Agency of Natural Resources, nearly 11 million tons of asphalt roofing shingle wastes are produced in the United States each year. Recent data suggests that the total is made up of about 9.4 million tons from roofing tear-offs and about 1.6 million tons from manufacturing scrap. Developing beneficial uses for these materials would conserve natural resources, promote protection of the environment and strengthen the economy. This project explored the feasibility of using chipped asphalt shingle materials in cement manufacturing kilns and circulating fluidized bed (CFB) boilers. A method of enhancing the value of chipped shingle materials for use as fuel by removing certain fractions for use as substitute raw materials for the manufacture of new shingles was also explored. Procedures were developed to prevent asbestos containing materials from being processed at the chipping facilities, and the frequency of the occurrence of asbestos in residential roofing tear-off materials was evaluated. The economic feasibility of each potential use was evaluated based on experience gained during the project and on a review of the well established use of shingle materials in hot mix asphalt. This project demonstrated that chipped asphalt shingle materials can be suitable for use as fuel in circulating fluidized boilers and cement kilns. More experience would be necessary to determine the full benefits that could be derived and to discover long term effects, but no technical barriers to full scale commercial use of chipped asphalt shingle materials in these applications were discovered. While the technical feasibility of various options was demonstrated, only the use of asphalt shingle materials in hot mix asphalt applications is currently viable economically.

  20. Recycling of plastic and rubber tire waste in asphalt pavements

    SciTech Connect (OSTI)

    Morrison, G.R.; Lee, N.K.; Hesp, S.A.M. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Chemistry

    1994-12-31T23:59:59.000Z

    This paper discusses some important issues related to the use of recycled thermoplastics and rubber tire waste in asphalt binders for hot-mix pavements. Both high temperature rheological and low temperature fracture studies are presented on recycled polyethylene, devulcanized and crumb rubber-modified asphalt binders. The results are compared to unmodified and commercially available modified binders. This research is especially timely in light of the US Intermodal Surface Transportation Efficiency Act of 1991, Section 1038 which, starting in 1995, will force state and local governments to use significant amounts of recycled rubber tire or plastic waste in federally funded highway projects. High temperature rheological measurements of the loss modulus, loss tangent and complex modulus show a significant improvement when only small quantities of crumb rubber, devulcanized crumb rubber or waste polyethylene are added to the asphalt binders. The low temperature fracture performance of the modified asphalts is greatly influenced by the interfacial strength between the dispersed and continuous phase. The fracture toughness increases dramatically, only when low molecular weight polymers are grafted in-situ onto the rubber and polymer dispersed phases in order to strength the interface. This points to a crack-pinning mechanism as being responsible for the dramatic increase in fracture toughness that is observed in this work. Single phase, devulcanized crumb rubber-asphalt systems perform quite poorly at low temperatures.

  1. Use of recycled chunk rubber asphalt concrete (CRAC) on low volume roads and use of recycled crumb rubber modifier in asphalt pavements. Final report, June 1993-June 1995

    SciTech Connect (OSTI)

    Hossain, M.; Funk, L.P.; Sadeq, M.A.; Marucci, G.

    1995-06-01T23:59:59.000Z

    The major objective of this project was to formulate a Chunk Rubber Asphalt Concrete (CRAC) mix for use on low volume roads. CRAC is a rubber modified asphalt concrete product produced by the `dry process` where rubber chunks of 1/2 inch size are used as aggregate in a cold mix with a type C fly ash. The second objective of this project was to develop guidelines concerning the use of rubber modified asphalt concrete hot mix to include: (1) Design methods for use of asphalt-rubber mix for new construction and overlay, (2) Mix design method for asphalt-rubber, and (3) Test method for determining the amount of rubber in an asphalt-rubber concrete for quality control purposes.

  2. Effect of pyrolyzed carbon black on asphalt cement. Part 2. Asphalt binder. Final report, September 1993-May 1995

    SciTech Connect (OSTI)

    Zeng, Y.; Lovell, C.W.

    1996-02-20T23:59:59.000Z

    Scrap tires derived from automobiles have become a large environmental problem in the United States. In the study, research is carried out to investigate the potential use of tire-derived pyrolyzed carbon black from scrap tires as an asphalt cement modifier. The asphlat cements used in the research were AC10 and AC20. Penetration and softening point tests were performed to obtain the consistency of the asphalt cements. The pyrolyzed carbon black, as provided by Wolf Industries, was combined with the asphalt cement in the following percentages: 5%, 10%, 15% and 20%. Penetration, softening point and ductility tests were performed to determine the temperature susceptibility of the modified binder as altered by the pyrolyzed carbon black. In order that the results are comparable to previous testing, commercial carbon black purchased from CABOT Industry was also used as a modifier in the tests. The same test procedures were applied to the asphalt cements modified by commercial carbon black. The test results contained in the report illustrate the viability of the pyrolyzed carbon black as an asphalt modifier. Recommendations are provided to facilitate further research on this particular project. A preliminary assessment of a test road using the pyrolyzed carbon is appended.

  3. A study of the effects of limestone rock asphalt screenings on the structural properties of hot-mix asphaltic concrete made with siliceous materials 

    E-Print Network [OSTI]

    Albritton, Oscar Willard

    1958-01-01T23:59:59.000Z

    LiSRagy pptt8pp py IEXAa A STUDY OF THE EFFECTS OF LIMESTONE ROCK ASPHALT SCREENINGS ON THE STRUCTURAL PROPERTIES OF HOT-MIX ASPHALTIC CONCRETE MADE WITH SILICEOUS MATERIALS A Thesis By OSCAR WILLARD. AQBRITTON Submitted to the Graduate... ON THE STRUCTURAL PROPERTIES OF HOT-MIX ASPHALTIC CONCRETE MADE WITH SILICEOUS MATERIALS A Thesis By OSCAR WILLARD ALBRITTON Approved as to Style and Content by: Chairman of Committee ead of Departme t August 1958 ACKNOWLEDGMENTS Acknowledgment is due...

  4. Mechanistic Studies of Reactions of Peroxodiiron(III) Intermediates in T201 Variants of Toluene/o-Xylene Monooxygenase Hydroxylase

    E-Print Network [OSTI]

    Lippard, Stephen J.

    Site-directed mutagenesis studies of a strictly conserved T201 residue in the active site of toluene/o-xylene monooxygenase hydroxylase (ToMOH) revealed that a single mutation can facilitate kinetic isolation of two ...

  5. Recycling asphaltic concrete with sulphur as a supplemental binder

    E-Print Network [OSTI]

    Barnett, Robert William

    1976-01-01T23:59:59.000Z

    in the United States, and the use of this secondary sulphur for construction purposes could provide not only a vast savings of natural resources and reusable materials but also aid industry in recovering the cost of environ- mental protection. The waste... industry [25, 26, 27, 28]. Research has been undertaken to investigate the use of sulphur in sand-asphalt- sulphur pavement mixes [11, 25, 29, 30]. The use of sulphur in sulphur-asphalt emulsions to serve as a binder has also been studied [26, 31, 32...

  6. Asphalt roofing industry Fourier transform infrared spectroscopy modified bitumen

    SciTech Connect (OSTI)

    NONE

    1999-07-01T23:59:59.000Z

    A Request for Emissions Testing at Four Asphalt Roofing and Processing Facilities was submitted by the US EPA Emission Standards Division (ESD), Minerals and Inorganic Chemicals Group (MICG) to the Emission Measurement Center (EMC). The Emission Measurement Center directed Midwest Research Institute (MRI) to conduct emissions testing at asphalt roofing plants. This report presents results of MRI`s FTIR and Method 25A testing conducted at US Intec in Port Arthur, Texas. The field measurements were performed in September 1997 under several test conditions for both controlled and uncontrolled emissions.

  7. Automated titration method for use on blended asphalts

    DOE Patents [OSTI]

    Pauli, Adam T. (Cheyenne, WY); Robertson, Raymond E. (Laramie, WY); Branthaver, Jan F. (Chatham, IL); Schabron, John F. (Laramie, WY)

    2012-08-07T23:59:59.000Z

    A system for determining parameters and compatibility of a substance such as an asphalt or other petroleum substance uses titration to highly accurately determine one or more flocculation occurrences and is especially applicable to the determination or use of Heithaus parameters and optimal mixing of various asphalt stocks. In a preferred embodiment, automated titration in an oxygen gas exclusive system and further using spectrophotometric analysis (2-8) of solution turbidity is presented. A reversible titration technique enabling in-situ titration measurement of various solution concentrations is also presented.

  8. A Methodology of Quantifying Precipitation Exposure for Wet-Weather Collisions and Evaluating Effectiveness of Open-Grade Asphalt Concrete as a Countermeasure

    E-Print Network [OSTI]

    Chan, Ching-Yao; Jin, Eui-Jae; Oh, Soon Mi; Ragland, David R

    2010-01-01T23:59:59.000Z

    Open-graded Asphaltic Concrete Friction Courses in Arizona.for Open-Graded Asphalt Concrete (OGAC) Wearing Courses.of Open-Grade Asphalt Concrete as a Countermeasure Ching-Yao

  9. asphalt technology development: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    asphalt technology development First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development and...

  10. asphalt based materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    asphalt based materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Establishing material...

  11. Controlling Thermal Properties of Asphalt Concrete and its Multifunctional Applications

    E-Print Network [OSTI]

    Shi, Xijun

    2014-08-10T23:59:59.000Z

    of the thermally modified asphalt mixtures on the surface temperature of pavements and bridges, a series of heat transfer analysis were conducted using the finite difference heat transfer model. In addition, a case study of a building using EPP modified cement...

  12. Measurements of moisture suction in hot mix asphalt mixes

    E-Print Network [OSTI]

    Kassem, Emad Abdel-Rahman

    2006-10-30T23:59:59.000Z

    The presence of moisture in hot mix asphalt (HMA) causes loss of strength and durability of the mix, which is referred to as moisture damage. This study deals with the development of experimental methods for measuring total suction in HMA, which can...

  13. asphalt construction premature: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    asphalt construction premature First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Moisture Diffusion in...

  14. Summary of Construction Activities and Results from Six Initial Accelerated Pavement Tests Conducted on Asphalt Concrete Pavement Section for Modified-Binder Overlay

    E-Print Network [OSTI]

    Bejarano, Manuel O.; Morton, Bruce S.; Scheffy, Clark

    2005-01-01T23:59:59.000Z

    Testing on the Asphalt Concrete FWD testing was conducted onin asphalt concrete modulus after HVS testing for Sectionsconcrete pavements under accelerated pavement testing. This

  15. The use of sulfer modified bottom ash (SMBA) as an aggregate in asphaltic mixtures

    E-Print Network [OSTI]

    Chimakurthy, Harshavardhan

    1998-01-01T23:59:59.000Z

    , bottom ash is lighter in weight and generally much cheaper than conventional quality aggregates such as limestone, sand and gravel. This research was designed to up-grade the load-bearing charactcnstics of bottom ash and maximize its usc m asphaltic... and gravel. According to a study done by Hafizuddin Ahmad in 1974, sulfur was used extensively in sand-asphalt sulfur to upgrade marginal aggregates for use in asphaltic mixtures, was developed at Texas Transportation Institute (TT1) (JO). TTI's work...

  16. Tertiary nitrogen heterocyclic material to reduce moisture-induced damage in asphalt-aggregate mixtures

    DOE Patents [OSTI]

    Plancher, Henry (Laramie, WY); Petersen, Joseph C. (Laramie, WY)

    1982-01-01T23:59:59.000Z

    Asphalt-aggregate roads crack when subjected to freezing and thawing cycles. Herein, the useful life of asphalts are substantially improved by a minor amount of a moisture damage inhibiting agent selected from compounds having a pyridine moiety, including acid salts of such compounds. A shale oil fraction may serve as the source of the improving agent and may simply be blended with conventional petroleum asphalts.

  17. The use of HPGPC for determination of MWD of asphalt cement - A spectrophotometric vs. gravimetric finish

    SciTech Connect (OSTI)

    Bishara, S.W.; McReynolds, R.L. (Kansas Dept. of Transportation, Topeka (United States))

    1990-07-01T23:59:59.000Z

    A comparison between spectrophotometric and gravimetric methods to study MWD of asphalt is presented. Spectrophotometry suffers from not detecting saturated compounds, as well as from variation of molar absorptivity during analysis. To address these shortcoming, the whole asphalt sample is fractionated, and the relative molar absorptivity determined for each fraction. Using another sample weight of the whole asphalt, the saturates are separated, and injected to get their MWD using refractive index detection. This information, when used to mathematically treat the whole asphalt distribution data, can correct the latter to include saturates as well, but can only partially account for continuous variation of the molar absorptivity.

  18. Experimental Study on Geocell-Reinforced Flexible Pavements with Recycled Asphalt Pavement (RAP) Bases under Cyclic Loading

    E-Print Network [OSTI]

    Acharya, B. S.

    2011-12-31T23:59:59.000Z

    ABSTRACT The reprocessed old hot mix asphalt (HMA) concrete also called "Recycled Asphalt Pavement (RAP)", if used to build new roads or to maintain existing roads, would have several benefits, such as preservation of natural resources for future...

  19. Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded Viscoelastic Model, Part-I: Development,

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded simulations, correspondence principle, finite-element method Abstract. Asphalt concrete pavements to climatic conditions are the major cause of such graded non-homogeneity. Current pavement analysis

  20. Microstructural Characterization of the Chemo-mechanical Behavior of Asphalt in Terms of Aging and Fatigue Performance Properties

    E-Print Network [OSTI]

    Allen, Robert Grover

    2013-03-27T23:59:59.000Z

    The study of asphalt chemo-mechanics requires a basic understanding of the physical properties and chemical composition of asphalt and how these properties are linked to changes in performance induced by chemical modifications. This work uniquely...

  1. Integrated coke, asphalt and jet fuel production process and apparatus

    DOE Patents [OSTI]

    Shang, Jer Y. (McLean, VA)

    1991-01-01T23:59:59.000Z

    A process and apparatus for the production of coke, asphalt and jet fuel m a feed of fossil fuels containing volatile carbon compounds therein is disclosed. The process includes the steps of pyrolyzing the feed in an entrained bed pyrolyzing means, separating the volatile pyrolysis products from the solid pyrolysis products removing at least one coke from the solid pyrolysis products, fractionating the volatile pyrolysis products to produce an overhead stream and a bottom stream which is useful as asphalt for road pavement, condensing the overhead stream to produce a condensed liquid fraction and a noncondensable, gaseous fraction, and removing water from the condensed liquid fraction to produce a jet fuel-containing product. The disclosed apparatus is useful for practicing the foregoing process. the process provides a useful method of mass producing and jet fuels from materials such as coal, oil shale and tar sands.

  2. Microstructural Characterization of Material Properties and Damage in Asphalt Composites 

    E-Print Network [OSTI]

    Mohammad Khorasani, Sara

    2013-05-03T23:59:59.000Z

    by NPRP grant # 08-310-2-110 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. vi TABLE OF CONTENTS Page ABSTRACT... ........................................................................................................................ 17 3D Experimental Investigation of the Microstructure of Cement Pastes Using Synchrotron X-Ray Microtomography (?CT) .......................................................... 18 Dynamic Modulus Simulation of the Asphalt Concrete Using the X...

  3. Evaluation of Rexene polymers in hot mixed asphalt concrete

    E-Print Network [OSTI]

    Rodriguez, Mary Anne Reese

    1991-01-01T23:59:59.000Z

    -- polyethylene, polypropylene, ethylene-vinyl acetate (EVA) and ethylene-propylene rubbers -- show increased stability and stiffness modulus, increased resistance to permanent deformation and lower temperature susceptibility. Carpenter and VanDam (14... five asphalt additives: block copolymer rubber, SBR latex, EVA, polyethylene and carbon black. Mixture stability, stiffness, tensile strength and resistance to fatigue, thermal cracking, permanent deformation and moisture damage were tested. Three...

  4. A novel method of bitumen extraction from asphalt pavement

    SciTech Connect (OSTI)

    Houser, T.J. (Western Michigan Univ., Kalamazoo (United States))

    1990-07-01T23:59:59.000Z

    A new method of extracting bitumen from asphalt pavement mixtures has been developed which does not require chlorinated or aromatic compounds for solvents. The preferred solvent is cyclohexane (although cyclopentane may be used) at high temperatures and pressures. The new method requires equipment that is less costly than the centrifuge method currently used and takes less time than extractions with Bioact but more time than when chlorocompounds are used.

  5. INTRODUCTION The increase in energy costs has led to a significant rise in the cost of mixtures containing asphalt cement. This resulted

    E-Print Network [OSTI]

    Harms, Kyle E.

    containing asphalt cement. This resulted in a need to search for alternatives that reduce the cost of those mixed with low percentages (1 percent below standard HMA mixtures) of paving grade asphalt cement and lower percentages of asphalt cement binder and easier compaction efforts. Asphalt treated mixtures can

  6. Effect of pavement temperature on the macrotexture of a semidense asphalt surface

    E-Print Network [OSTI]

    Boyer, Edmond

    Effect of pavement temperature on the macrotexture of a semidense asphalt surface J. Luong, M the pavement temperature could change the texture surface of the pavement. The aim of this work is to analyze the influence of the surface temperature on the macrotexture of a semidense asphalt pavement located in an urban

  7. Dynamic Effects on Moisture Transport in Asphalt Concrete M. Emin Kutay1

    E-Print Network [OSTI]

    Aydilek, Ahmet

    Dynamic Effects on Moisture Transport in Asphalt Concrete M. Emin Kutay1 and Ahmet H. Aydilek2 2007 133:7 406 CE Database subject headings: Moisture; Asphalt concrete; Dynamics; Hydraulic and Magdalena 2002 ; however, limited research has been conducted in modeling dynamic flow in porous geomedia

  8. RESEARCH REPORT 987-9 ASPHALT OVERLAY DESIGN METHODS FOR RIGID

    E-Print Network [OSTI]

    Texas at Austin, University of

    by using a fractional factorial design. An analysis of variance (ANOVA) was performed to identifyRESEARCH REPORT 987-9 ASPHALT OVERLAY DESIGN METHODS FOR RIGID PAVEMENTS CONSIDERING RUTTING's Catalog No. 5. Report Date October 1998 4. Title and Subtitle ASPHALT OVERLAY DESIGN METHODS FOR RIGID

  9. Characterization of asphalt cements modified with crumbed rubber from discarded tires. Final report

    SciTech Connect (OSTI)

    Daly, W.H.; Negulescu, I.I.

    1994-11-01T23:59:59.000Z

    The potential legislative requirement for incorporation of scrap rubber into asphalt blends mandated a thorough evaluation of the influence of scrap rubber additives on the physical properties and aging characteristics of rubber/asphalt blends. Blends with up to 20 percent ground vulcanized rubber (both crumb and 200 mesh powder particles) from recycled tires were prepared with asphalt cements of various grades (AC5 - AC30) and evaluated using DMA. Blends produced from powdered rubber particles exhibited Newtonian behavior at high temperatures; similar behavior was not observed with crumb rubber blends. The mechanical properties of asphalt-rubber blends depend upon the concentration of rubber additives, the particle dimensions, and the chemical composition of the asphalt.

  10. A study of the effects of limestone rock asphalt screenings on the structural properties of hot-mix asphaltic concrete made with siliceous materials

    E-Print Network [OSTI]

    Albritton, Oscar Willard

    1958-01-01T23:59:59.000Z

    Society for Testing Materials, Phila. , Pa. 15 PROCEDURE To limit the wide variations of aggregate grading, specifica- tions of the Texas Highway Department for a Type "D" Hot-Mix, Hot- Laid, Asphaltic Concrete were used as a guide in the design... Standards on Mineral Aggregates, Concrete, and Nonbituminous Highway Materials, American Society for Testing Materials, Phila, , Pa. Benson, Fred J, and Bh. Subbaraju, "Specific Gravity of Aggregates in Asphaltic Paving Mixtures, " Texas Engineering...

  11. Genotoxicity and apoptosis in Drosophila melanogaster exposed to benzene, toluene and xylene: Attenuation by quercetin and curcumin

    SciTech Connect (OSTI)

    Singh, Mahendra P. [Embryotoxicology Section, Indian Institute of Toxicology Research (CSIR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh (India); Mishra, M.; Sharma, A.; Shukla, A.K. [Embryotoxicology Section, Indian Institute of Toxicology Research (CSIR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh (India); Council of Scientific and Industrial Research (CSIR), New Delhi (India); Mudiam, M.K.R.; Patel, D.K. [Analytical Chemistry Section, Indian Institute of Toxicology Research, Mahatma Gandhi Marg, Lucknow 226 001, Uttar Pradesh (India); Council of Scientific and Industrial Research (CSIR), New Delhi (India); Ram, K. Ravi [Embryotoxicology Section, Indian Institute of Toxicology Research (CSIR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh (India); Council of Scientific and Industrial Research (CSIR), New Delhi (India); Chowdhuri, D. Kar, E-mail: dkarchowdhuri@rediffmail.com [Embryotoxicology Section, Indian Institute of Toxicology Research (CSIR), Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh (India); Council of Scientific and Industrial Research (CSIR), New Delhi (India)

    2011-05-15T23:59:59.000Z

    Monocyclic aromatic hydrocarbons (MAHs) such as benzene, toluene and xylene are being extensively used for various industrial and household purposes. Exposure to these hydrocarbons, occupationally or non-occupationally, is harmful to organisms including human. Several studies tested for toxicity of benzene, toluene and xylene, and interestingly, only a few studies looked into the attenuation. We used Drosophila model to test the genotoxic and apoptotic potential of these compounds and subsequently evaluated the efficiency of two phytochemicals, namely, quercetin and curcumin in attenuating test chemical induced toxicity. We exposed third instar larvae of wild type Drosophila melanogaster (Oregon R{sup +}) to 1.0-100.0 mM benzene, toluene or xylene, individually, for 12, 24 and 48 h and examined their apoptotic and genotoxic potential. We observed significantly (P < 0.001) increased apoptotic markers and genotoxicity in a concentration- and time-dependent manner in organisms exposed to benzene, toluene or xylene. We also observed significantly (P < 0.001) increased cytochrome P450 activity in larvae exposed to test chemicals and this was significantly reduced in the presence of 3',4'-dimethoxyflavone, a known Aryl hydrocarbon receptor (AhR) blocker. Interestingly, we observed a significant reduction in cytochrome P450 activity, GST levels, oxidative stress parameters, genotoxic and apoptotic endpoints when organisms were exposed simultaneously to test chemical along with quercetin or curcumin. The study further suggests the suitability of D. melanogaster as an alternate animal model for toxicological studies involving benzene, toluene and xylene and its potential in studying the protective role(s) of phytochemicals.

  12. High temperature performance of scrap tire rubber modified asphalt concrete

    SciTech Connect (OSTI)

    Coomarasamy, A. [Ministry of Transportation, Downsview, Ontario (Canada); Manolis, S.; Hesp, S. [Queen`s Univ., Kingston, Ontario (Canada)

    1996-12-31T23:59:59.000Z

    Wheel track rutting tests on mixes modified with 30 mesh, 80 mesh, and very fine colloidal crumb rubber particles show that a very significant improvement in performance occurs with a reduction in the rubber particle size. The SHRP binder test for rutting, which was originally developed for homogeneous systems only, does not predict the performance improvement for smaller rubber particles. If these new scrap rubber binder systems are to be used in pavements then rutting tests on the asphalt-aggregate mixture should be conducted in order to accurately predict high temperature performance.

  13. Multiple Roles of Component Proteins in Bacterial Multicomponent Monooxygenases: Phenol Hydroxylase and Toluene/o-Xylene Monooxygenase from Pseudomonas sp. OX1

    E-Print Network [OSTI]

    Tinberg, Christine E.

    Phenol hydroxylase (PH) and toluene/o-xylene monooxygenase (ToMO) from Pseudomonas sp. OX1 require three or four protein components to activate dioxygen for the oxidation of aromatic substrates at a carboxylate-bridged ...

  14. Correlation of the phase equilibrium data for the heptane-toluene-sulfolane and heptane-xylene-sulfolane systems

    SciTech Connect (OSTI)

    Cassell, G.W.; Hassan, M.M.; Hines, A.L. (Univ. of Missouri, Dept. of Chemical Engineering, Columbia, MO (US))

    1989-10-01T23:59:59.000Z

    Liquid-liquid equilibrium data were measured for the heptane-toluene-sulfolane system at 25{sup 0}C and for the heptane-xylene-sulfolane system at 17, 25, and 50{sup 0}C. The NRTL and UNIQUAC equations are used to correlate the experimental data and to predict the phase compositions of the ternary systems. The agreement between the predicted and the experimental results was equally good with both equations.

  15. Influence of fundamental material properties and air void structure on moisture damage of asphalt mixes 

    E-Print Network [OSTI]

    Arambula Mercado, Edith

    2009-05-15T23:59:59.000Z

    parameters were obtained using mechanical tests and surface energy measurements. The microstructure of asphalt mixes prepared in the laboratory having different air void structures was captured using X-ray CT, and image analysis techniques were used...

  16. Evaluation of healing in asphalt binders using dynamic shear rheometer and molecular modeling techniques 

    E-Print Network [OSTI]

    Bommavaram, Ramamohan Reddy

    2009-05-15T23:59:59.000Z

    A self-healing material has the inherent ability to partially reverse damage such as crack formation that might have occurred during its service. Significant evidence exists in the literature to indicate that asphalt binder is a self...

  17. A Continuum Coupled Moisture-mechanical Constitutive Model for Asphalt Concrete

    E-Print Network [OSTI]

    Shakiba, Maryam

    2013-12-09T23:59:59.000Z

    procedure and give insight into the various damage inducing mechanisms in asphalt concrete. In this dissertation, thermo-hygro-mechanical constitutive relationships are developed based on the principle of virtual power and laws of thermodynamics in order...

  18. Chip Seals for Asphalt Concrete Pavements: A Proposed Emulsion Residue Specification and Existing Pavement Texture Evaluation

    E-Print Network [OSTI]

    Hoyt, Denise

    2012-07-16T23:59:59.000Z

    Chip seals are a pavement surface treatment used for maintaining asphalt concrete pavements. National Cooperative Highway Research Program (NCHRP) Project 14-17 was performed to produce a national Chip Seal Manual which would consolidate the best...

  19. Development of superior asphalt recycling agency: Phase 1, Technical feasibility. Technical progress report

    SciTech Connect (OSTI)

    Bullin, J.A.; Glover, C.J.; Davison, R.R.; Lin, Moon-Sun; Chaffin, J.; Liu, Meng; Eckhardt, C.

    1996-04-01T23:59:59.000Z

    About every 12 years, asphalt roads must be reworked, and this is usually done by placing thick layers (hot-mix overlays) of new material on top of failed material, resulting in considerable waste of material and use of new asphalt binder. A good recycling agent is needed, not only to reduce the viscosity of the aged material but also to restore compatibility. Objective is to establish the technical feasibility (Phase I) of determining the specifications and operating parameters for producing high quality recycling agents which will allow most/all the old asphalt-based road material to be recycled. It is expected that supercritical fractionation can be used. The advanced road aging simulation procedure will be used to study aging of blends of old asphalt and recycling agents.

  20. A program to design asphalt concrete overlays to mitigate reflection cracking

    E-Print Network [OSTI]

    Satyanarayana Rao, Sindhu

    2002-01-01T23:59:59.000Z

    of the research are to understand the occurrence and behavior of reflection cracking and for devising ways of mitigating them and to put together an effective and complete package of computer programs to design asphalt concrete overlays. Another primary objective...

  1. Evaluation of healing in asphalt binders using dynamic shear rheometer and molecular modeling techniques

    E-Print Network [OSTI]

    Bommavaram, Ramamohan Reddy

    2009-05-15T23:59:59.000Z

    the parameters of characteristic healing function of asphalt binders. In the second part of this study, Molecular Modeling (MM) techniques were used to determine the interrelationship between molecular structure, surface free energy, self diffusivity, and other...

  2. Laboratory evaluation of crumb rubber asphalt concrete mixtures using the concepts of SMA mixtures 

    E-Print Network [OSTI]

    Rebala, Somasekhar Reddy

    1994-01-01T23:59:59.000Z

    Eight CRM asphalt concrete mixtures were evaluated using AAMAS characterization procedures: Four wet-process mixtures and four dry-process mixtures. These mixtures were compared to a conventional dense graded mixture. It was determined that CRM has...

  3. Automated Protocol for the Analysis of Dynamic Mechanical Analyzer Date from Fine Aggregate Asphalt Mixes 

    E-Print Network [OSTI]

    Cavalcanti De Sousa, Pedro

    2010-10-12T23:59:59.000Z

    Fatigue cracking and moisture damage are two important modes of distresses in asphalt pavements. Recently, the Dynamic Mechanical Analyzer (DMA) was used to characterize fatigue cracking and evaluate the effects of moisture ...

  4. The morphology of polymer modified asphalt and its relationship to rheology and durability

    E-Print Network [OSTI]

    Kraus, Zachary Rothman

    2008-10-10T23:59:59.000Z

    % % loglog * deg6010* deg6010 ?? , where d%A is the change in asphaltene in the asphalt (19). The other theory is that only the polar aromatics and napthene aromatics fluoresce when separated from the asphalt binder (16). Therefore as polar and napthene... aromatics change to asphaltenes with oxidative aging, the brightness would decrease. This brightness decrease would correspond to the increase in asphaltene with carbonyl area leading to a graph that looks like a chart for hardening susceptibility...

  5. An investigation of three problems concerning the analysis of airborne asphalt fumes

    E-Print Network [OSTI]

    Laird, Larry Teal

    1981-01-01T23:59:59.000Z

    AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY TEAL LAIRD Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1981 Major Subject: Industrial Hygiene AN INVESTIGATION OF THREE PROBLEMS CONCERNING THE ANALYSIS OF AIRBORNE ASPHALT FUMES A Thesis by LARRY T. LAIRD Approved as to style and content by: (Chairm of Committee) (Head of Department...

  6. Evaluation of oil shale bitumen as a pavement asphalt additive to reduce moisture damage susceptibility

    SciTech Connect (OSTI)

    Robertson, R.E.; Harnsberger, P.M.; Wolf, J.M.

    1991-01-01T23:59:59.000Z

    An unrefined shale bitumen was evaluated as an agent to reduce moisture damage susceptibility of asphalt aggregate mixtures. Some activity was observed but less than might have been expected based on the molecular weight and nitrogen content of the bitumen. The counter effects of free carboxylic acids, which are known to be variable in asphalt and which are also present in the unrefined bitumen, appear to diminish the activity of the bitumen to inhibit moisture damage. 5 refs., 1 tab.

  7. Evaluation of the effects of crumb rubber and SBR on rutting resistance of asphalt concrete

    SciTech Connect (OSTI)

    Shih, Chuang-Tsair; Tia, Mang; Ruth, B.E. [Univ. of Florida, Gainesville, FL (United States)

    1996-12-31T23:59:59.000Z

    This paper presents the results of a study to evaluate the effects of addition of crumb rubber (CR) and styrene-butadiene rubber (SBR) on the rutting resistance of asphalt concrete. These two additives were blended with an AC-20 and an AC-30 grade asphalt cements at different levels of concentrations. These modified and unmodified asphalt blends were tested at intermediate and high temperatures to evaluate their rutting resistance characteristics. They were also used to make Florida type S-I structural surface mixtures. These mixtures were made into Marshall-size specimens by using Gyratory Testing Machine (GTM) equipped with air-roller to compact and density to three compaction levels which simulate three different conditions in the pavement. The FDOT`s (Florida Department of Transportation) Loaded Wheel Tester was also used to evaluate the rutting resistance of these asphalt mixtures. The test results indicate that the modified asphalt mixtures show relatively better rutting resistance and shear resistance as compared with the unmodified asphalt mixtures.

  8. State of the practice: Design and construction of asphalt paving materials with crumb-rubber modifier. Final report

    SciTech Connect (OSTI)

    Heitzman, M.A.

    1992-05-01T23:59:59.000Z

    The document is a comprehensive overview of the terminology, processes, products, and applications of crumb rubber modifier (CRM) technology. The technology includes any use of scrap tire rubber in asphalt paving materials. In general, CRM technology can be divided into two categories--the wet process and the dry process. When CRM is incorporated into an asphalt paving material, it will modify the properties of the binder (asphalt rubber) and/or act as a rubber aggregate (rubber modified hot mix asphalt). The five concepts for using CRM discussed in the report are McDonald, PlusRide, generic dry, chunk rubber asphalt concrete, and continuous blending asphalt rubber. There are two principal unresolved engineering issues related to the use of CRM in asphalt paving materials. On the national level, the ability to recycle asphalt paving mixes containing CRM has not been demonstrated. At the State and local levels, these modified asphalt mixes must be field evaluated to establish expected levels of performance. The appendices provide guidelines for material specifications, mix design, and construction specifications. An experimental work plan for monitoring performance and a stack emission testing program are also included.

  9. Development of statistical wet weather model to evaluate frictional properties at the pavement-tire interface on hot mix asphalt concrete

    E-Print Network [OSTI]

    Bedi, Harpreet

    2001-01-01T23:59:59.000Z

    Skid resistance on wet pavements is influenced by friction at the tire-pavement interface as well as overall hot mix asphalt (HMA) performance. It is important to control aggregate, asphalt, and mix properties to achieve desirable frictional...

  10. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    and the origin of heavy oil. Nature, 426, 344-352. HEITKAMP,natural asphalts and heavy oil compounds. A major questionmainly of asphalts and heavy oils, which have saturated into

  11. Department of Energy and Mineral Engineering Spring Roller Design to Increase the Lifespan of Asphalt Compactor Wiper Blades

    E-Print Network [OSTI]

    Demirel, Melik C.

    the Lifespan of Asphalt Compactor Wiper Blades By: Thomas Krupa, Eric Resch, Phillip Yesenosky, John Marshall, Asset Kusmanov Overview Volvo CE's asphalt compactors have a polymer wiper blade that is used life. o The roller was tested five times as long as the wipers and never showed any change in diameter

  12. Development of superior asphalt recycling agents. Phase 1, Technical feasibility. Final technical progress report

    SciTech Connect (OSTI)

    Bullin, J.A.; Davison, R.R.; Glover, C.J.; Chaffin, J.; Liu, M.; Madrid, R.

    1997-07-01T23:59:59.000Z

    After an introduction and a literature survey in Chap. 1, Chap. 2 describes the tasks, together with objectives and important results obtained for each task throughout the entire project. Chaps. 3 thru 7 detail work in developing a qualitative and quantitative knowledge of asphalt oxidation, composition dependence of asphalt properties, and guidelines for producing superior asphalt binders through composition control. They also detail the development of a kinetic model for asphalt oxidative aging and present an understanding of the composition dependence of asphalt oxidation as well as other performance-related properties. Chaps. 8 and 9 compare the aging performance of recycled blends produced using commercial recycling agents and industrial supercritical fractions as rejuvenating agents. Oxidative aging of the recycled blends were evaluated along with the performance of the recycled blends in terms of the strategic highway research program performance grading procedure. Chap. 10 summarizes the work completed in the areas of processing schemes development, projection updates, and scale-up and commercialization plans.

  13. Effects of carboxylic acids on the rheological properties of crumb rubber modified asphalt

    SciTech Connect (OSTI)

    Tauer, J.E.; Robertson, R.E. [Western Research Institute, Laramie, WY (United States)

    1996-12-31T23:59:59.000Z

    The Federal mandate of 1991-1995 on the use of scrap tires in Federal roadway construction sparked a major interest in gaining a fundamental understanding of the behavior of rubber in asphalt. This study is a systematic elucidation of what chemistry controls the final crumb rubber modified asphalt (CRMA) product quality. We discovered that the type and total acid content in the asphalt are the most influential chemical factors that determine the changes in the important roadway properties of shear modulus (G*) and loss angle ({delta}) of CRMA. Low acid (<0.005 m/L) asphalts were modified with three types of carboxylic acid and each made into CRMA using typical field mixing conditions of 1 hour at 175{degrees}C. Rheological measurements were then made at various storage times up to 192 hours following storage at both 156 and 200{degrees}C. We found the changes in CRMA theological properties correspond to the acid type spiked into the asphalt.

  14. Viscoroute 2.0: a tool for the simulation of moving load effects on asphalt pavement

    E-Print Network [OSTI]

    Chabot, Armelle; Deloffre, Lydie; Duhamel, Denis

    2010-01-01T23:59:59.000Z

    As shown by strains measured on full scale experimental aircraft structures, traffic of slow-moving multiple loads leads to asymmetric transverse strains that can be higher than longitudinal strains at the bottom of asphalt pavement layers. To analyze this effect, a model and a software called ViscoRoute have been developed. In these tools, the structure is represented by a multilayered half-space, the thermo-viscoelastic behaviour of asphalt layers is accounted by the Huet-Sayegh rheological law and loads are assumed to move at constant speed. First, the paper presents a comparison of results obtained with ViscoRoute to results stemming from the specialized literature. For thick asphalt pavement and several configurations of moving loads, other ViscoRoute simulations confirm that it is necessary to incorporate viscoelastic effects in the modelling to well predict the pavement behaviour and to anticipate possible damages in the structure.

  15. Asphalt emulsion radon barrier systems for uranium mill tailings: an overview of the technology

    SciTech Connect (OSTI)

    Baker, E.G.; Hartley, J.N.; Freeman, H.D.; Gates, T.E.; Nelson, D.A.; Dunning, R.L.

    1984-03-01T23:59:59.000Z

    Pacific Northwest Laboratory (PNL), under contract to the US Department of Energy (DOE) Uranium Mill Tailings Remedial Action Project (UMTRAP) office, has developed an asphalt emulsion cover system to reduce the release of radon from uranium mill tailings. The system has been field tested at Grand Junction, Colorado. Results from laboratory and field tests indicate that this system is effective in reducing radon release to near-background levels (<2.5 pCi m/sup -2/s/sup -1/) and has the properties required for long-term effectiveness and stability. Engineering specifications have been developed, and analysis indicates that asphalt emulsion covers are cost-competitive with other cover systems. This report summarizes the technology for asphalt emulsion radon barrier systems. 59 references, 45 figures, 36 tables.

  16. Application of pyrolized carbon black from scrap tires in asphalt pavement design and construction

    SciTech Connect (OSTI)

    Park, T.; Coree, B.J. [Indiana Department of Transportation, West Lafayette, IN (United States). Division of Research; Lovell, C.W. [Purdue Univ., West Lafayette, IN (United States). School of Civil Engineering

    1995-12-31T23:59:59.000Z

    According to EPA reports (1991) of the over 242 million waste generated each year in the United State, 5% are exported, 6% recycled, 11% incinerated, and 78% are landfilled, stockpiled, or illegally dumped. A variety of uses for these tires are being studied. Among these is pyrolysis which produces 5 5% of oil, 25% of carbon black, 9% of steel, 5% of fiber and 6% of gas. Pyrolized carbon black contains 9 % of ash, 4% of sulfur, 12% of butadine copolymer and 75% of carbon black. The objective of this research is to investigate the viability of using PCB as an additive in hot mix asphalt. The use of PCB in asphalt pavement is expected not only to improve the performance of conventional asphalt, but also to provide a means for the mass disposal of waste fires.

  17. Recycled tire rubber and other waste materials in asphalt mixtures. Transportation research record

    SciTech Connect (OSTI)

    NONE

    1995-12-31T23:59:59.000Z

    The papers in this volume, dealing with various facets of recycled tire rubber and other waste materials in asphalt mixtures, should be of interest to state and local construction, design, materials, and research engineers as well as contractors and material producers. In the first papers, Rebala and Estakhri, Malpass and Khosla, and Baker and Connolly describe research related to crumb rubber modified mixtures that was done for the Texas, North Carolina, and New Jersey State Departments of Transportation. Ali et al. report on their research in Canada to determine the feasibility of sing reclaimed roofing materials in hot mix asphalt pavement. Emery discusses the evaluation of 11 Ontario rubber modified demonstration projects in terms of pavement performance, environmental impacts, and recyclability. In the last paper, Fwa and Aziz report on their work in Singapore related to the use of incinerator residue in asphalt mixtures.

  18. Studies of asphalt air blowing and development of a new short-term aging technique

    E-Print Network [OSTI]

    Vassiliev, Nicolai

    2001-01-01T23:59:59.000Z

    , Table m-2. Low temperature hardening properi. ies of air blown asphalt fractions and blends. Table III-3. Parent asphalt HS, oxidation rate, and HR . Table IV-1. Estimated time required to achieve same degrcc of aging as RTFOT for Exxon AC-10 films... of varying I. hickness . 70 Table IV-2 Effect of air blowing conditions for Exxon AC- I 0, 325 'F, 70 min. 70 Table IV-3. Condensed volatiles and RTFOT mass change . 80 Table IV-4. Reproducibility analysis. LIST OF FIGURES P ige Figure I-l. Thin film...

  19. Characterization of a Peroxodiiron(III) Intermediate in the T201S Variant of Toluene/o-Xylene Monooxygenase Hydroxylase from Pseudomonas sp. OX1

    E-Print Network [OSTI]

    Song, Woon Ju

    We report the observation of a novel intermediate in the reaction of a reduced toluene/o-xylene monooxygenase hydroxylase (ToMOH[subscript red]) T201S variant, in the presence of a regulatory protein (ToMOD), with dioxygen. ...

  20. Primary and Secondary Glyoxal Formation from Aromatics: Experimental Evidence for the Bicycloalkyl-Radical Pathway from Benzene, Toluene, and p-Xylene

    E-Print Network [OSTI]

    -Radical Pathway from Benzene, Toluene, and p-Xylene R. Volkamer,*, U. Platt, and K. Wirtz Centro de Estudios Form: May 16, 2001 A new approach is presented to study the ring-cleavage process of benzene, toluene for the troposphere. The yield of glyoxal was determined to be 35% ( 10% for benzene and about 5% higher for toluene

  1. Influence of coarse aggregate size, shape and surface texture on rutting of hot mix asphalt concrete

    E-Print Network [OSTI]

    Yeggoni, Mohan

    1993-01-01T23:59:59.000Z

    increased Hveem Stability, Marshall Stability and resistance to creep of hot mix asphalt concrete. The resilient modulus of the specimens was also enhanced by the increase in the amount of crushed aggregate in the mix at high temperatures (115'F). Fractal...

  2. The State of the Practice and Common Pitfalls for Porous Asphalt for

    E-Print Network [OSTI]

    of stormwater treatment systems · To provide resources to stormwater communities currently involved in design)-131 Porous Asphalt Pavements (2008) NAPA IS-115 Open-Graded Friction Courses (2002) 3 #12;Overview 1. State of the Practice 2. Water Quality Performance 3. Hydraulic Performance 4. Cold Climate

  3. Project Information Form Project Title Evaluation of the Combined Effect of Recycled Asphalt Pavement (RAP),

    E-Print Network [OSTI]

    California at Davis, University of

    Pavement (RAP), Recycled Asphalt Shingles (RAS), and Different Virgin Binder Sources on Performance of Research Project As virgin material sources become increasingly scarce, and the volume of pavement material for pavement construction. The California Department of Transportation (Caltrans) has recently increased

  4. Mixture design and performance prediction of rubber-modified asphalt in Ohio. Final report

    SciTech Connect (OSTI)

    Liang, R.Y.

    1997-08-01T23:59:59.000Z

    Appropriate disposal of scrap tires has been a major environmental concern over the years, mainly due to potential fire and health hazards associated with uncontrolled stockpiling. Primarily driven by this environmental concern, the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 has required each State to begin incorporating scrap tire rubber into its asphalt paving materials. Although in the revision of the original ISTEA, the mandate has been eliminated, there remains a language of encouraging the use of crumb rubbers in asphalt paving materials. Ohio Department of Transportation (ODOT) desires to develop the mix design procedure, construction practice, and performance specifications for crumb rubber modified asphalt paving materials. This research was conducted to develop the needed design and construction guidance for meeting the ODOT anticipated needs. Specifically, the objectives of this research encompass the following scope: (1) investigation of the rheological properties of asphalt-rubber binder to determine optimum content of crumb rubber, (2) development of optimum mix design for various applications, including both wet and dry mix processes, (3) characterization of mechanical properties of recommended paving mixtures, including resilient modulus, fatigue cracking behavior, low-temperature thermal cracking resistance, water sensitivity test, incremental creep test and loaded wheel track test, and (4) comparison of performance of selected paving mixes.

  5. FIELD PERFORMANCE AND LABORATORY EVALUATION OF WARM MIX ASPHALT PRODUCED WITH RUBBERIZED BITUMEN

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    FIELD PERFORMANCE AND LABORATORY EVALUATION OF WARM MIX ASPHALT PRODUCED WITH RUBBERIZED BITUMEN of rubberized bitumen has been spread out mainly due to environmental aspects, but high mixing and compaction temperatures are necessary due to the higher viscosity of this bitumen. A WMA mixture (using a surfactant

  6. Creep Compliance Analysis Technique for the Flattened Indirect Tension Test of Asphalt Concrete

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Creep Compliance Analysis Technique for the Flattened Indirect Tension Test of Asphalt Concrete: ­ Cored Sample (Cylindrical) Indirect tensile testing (IDT) (Strength/Creep) ­ AASHTO T-322 Damage under and Flattened IDT · 1000-sec creep tests on three replicates · 0, -10, and -20 deg. C · Displacement

  7. Mirzahosseini et. al. ANN-Based Prediction Model for Rutting Propensity of Asphalt Mixtures1

    E-Print Network [OSTI]

    Fernandez, Thomas

    in a repeated load permanent deformation test.21 Dynamic creep test is one of the best tools for assessing of load cycles is the most23 important output of the dynamic creep test. This curve includes primary based on volumetric proportioning of the asphalt mixture. This method does16 not include any direct test

  8. Liquid-liquid equilibria for the ternary systems sulfolane + octane + benzene, sulfolane + octane + toluene and sulfolane + octane + p-xylene

    SciTech Connect (OSTI)

    Lee, S.; Kim, H. [Seoul National Univ. (Korea, Republic of). Dept. of Chemical Engineering

    1995-03-01T23:59:59.000Z

    Sulfolane is widely used as a solvent for the extraction of aromatic hydrocarbons. Ternary phase equilibrium data are essential for the proper understanding of the solvent extraction process. Liquid-liquid equilibrium data for the systems sulfolane + octane + benzene, sulfolane + octane + toluene and sulfolane + octane + p-xylene were determined at 298.15, 308.15, and 318.15 K. Tie line data were satisfactorily correlated by the Othmer and Tobias method. The experimental data were compared with the values calculated by the UNIQUAC and NRTL models. Good quantitative agreement was obtained with these models. However, the calculated values based on the NRTL model were found to be better than those based on the UNIQUAC model.

  9. Asphalt and Asphaltic Concrete

    E-Print Network [OSTI]

    Young, A. R.

    1914-05-01T23:59:59.000Z

    , and combined curb and gutter furnished and set, the rate for resetting old curbing; the rate per cubic yard for extra concrete, if any is used; the price per cubic yard for broken stone or gravel; the rate per square yard for paving and for relaying old...- tified and given access to the same at least ten days be- fore it is required for use, and any work in which re- jected cement was used will be rejected altogether. 5. The cement shall be packed in strong bags having printed on the outside the brand...

  10. A comparison of the fracture properties of conventional and polymer-modified two-layer asphalt concrete overlay systems 

    E-Print Network [OSTI]

    Reddy, Praveena Gutha

    1996-01-01T23:59:59.000Z

    The problem of reflection cracking through the conventional asphalt concrete overlays has increased the need to find new materials which could resist cracking or fracture more effectively. It is for this reason that polymers ...

  11. Comparison of fatigue analysis approaches for predicting fatigue lives of hot-mix asphalt concrete (HMAC) mixtures

    E-Print Network [OSTI]

    Walubita, Lubinda F.

    2006-08-16T23:59:59.000Z

    Hot-mix asphalt concrete (HMAC) mixture fatigue characterization constitutes a fundamental component of HMAC pavement structural design and analysis to ensure adequate field fatigue performance. HMAC is a heterogeneous complex composite material...

  12. Fatigue resistance of hot-mix asphalt concrete (HMAC) mixtures using the calibrated mechanistic with surface energy (CMSE) measurements approach

    E-Print Network [OSTI]

    Ofori-Abebresse, Edward Kwame

    2006-10-30T23:59:59.000Z

    Fatigue cracking is one of the fundamental distresses that occur in the life of a Hot Mix Asphalt Concrete (HMAC) pavement. This load induced distress leads to structural collapse of the entire pavement ultimately and can only be remedied...

  13. Fatigue resistance of hot-mix asphalt concrete (HMAC) mixtures using the calibrated mechanistic with surface energy (CMSE) measurements approach 

    E-Print Network [OSTI]

    Ofori-Abebresse, Edward Kwame

    2006-10-30T23:59:59.000Z

    Fatigue cracking is one of the fundamental distresses that occur in the life of a Hot Mix Asphalt Concrete (HMAC) pavement. This load induced distress leads to structural collapse of the entire pavement ultimately and can ...

  14. A unified method for the analysis of nonlinear viscoelasticity and fatigue cracking of asphalt mixtures using the dynamic mechanical analyzer

    E-Print Network [OSTI]

    Castelo Branco, Veronica Teixeira Franco

    2009-05-15T23:59:59.000Z

    A UNIFIED METHOD FOR THE ANALYSIS OF NONLINEAR VISCOELASTICITY AND FATIGUE CRACKING OF ASPHALT MIXTURES USING THE DYNAMIC MECHANICAL ANALYZER A Dissertation by VERONICA TEIXEIRA FRANCO CASTELO BRANCO Submitted to the Office... VISCOELASTICITY AND FATIGUE CRACKING OF ASPHALT MIXTURES USING THE DYNAMIC MECHANICAL ANALYZER A Dissertation by VERONICA TEIXEIRA FRANCO CASTELO BRANCO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  15. A study of substitution solvents in asphalt fume extraction and the effects of heating duration and temperature 

    E-Print Network [OSTI]

    Curry, Noel Thomas

    1981-01-01T23:59:59.000Z

    may be used as substitute solvents for the solvent extraction analytical method for asphalt furres proposed by NlnSH and currently in use by OSHA. Benzene is known to orovide IC0% effic- 1 iency in asphalt fume extraction. The results..., rather than the solvents' effic- iency loss, was responsible for the differences. The importance of the data lies in the fact that the other two test solvents exhibited a consiatency equal to that of benzene. 'Ahile the exact coefficient of any...

  16. BTX Holdings Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass Conversions Inc JumpIM 2011-003 Jump to: JumpBPL Global JumpBSST

  17. An analysis of some properties of paving asphalts in Texas as they relate to pavement performance

    E-Print Network [OSTI]

    DuBose, Emmett Haygood

    1980-01-01T23:59:59.000Z

    51 73 93 115 115 DISTRESS AND CRACKING FACTORS THE PAVEMENT PERFORMANCE SYSTEM 5 CONCLUSIONS AND RECOMMENDATIONS CONCLUSIONS RECOMMENDATIONS REFERENCES . APPENDIX A: RAW DATA APPENDIX B: PAVEMENT PERFORMANCE VS. TIME CURVES APPENDIX C... harden1ng model. It had been shown in earlier research that excessive asphalt1c concrete binder hardening was a detrimental factor influencing certain types of pavement distress such as thermal cracking, raveling, fatigue cracking, and reflective crack...

  18. Thickness estimation of subsurface layers in asphalt pavement using monstatic ground penetrating radar

    E-Print Network [OSTI]

    Lau, Chun Lok

    1991-01-01T23:59:59.000Z

    for the degree of MASTER OF SCIENCE December 1991 Major Subject: Electrical Engineering THICKNESS ESTIMATION OF SUBSURFACE LAYERS IN ASPHALT PAVEMENT USING MONSTATIC GROUND PENETRATING RADAR A Thesis CHUN LOK LAU Approved as to style and content by... ACKNOWLEDGEMENTS. LIST OF FIGURES. . CHAPTER I INTRODUCTION. 1. 1 Importance of pavement profile data. 1. 2 Principle of Ground Penetrating Radar (GPR) . . . 1. 3 Subsurface layer thickness measurement method. . . . . . II GPR ANTENNA AND SYSTEM CALIBRATION...

  19. Oxidative reactions and their impact on the properties of asphalt as a pavement binder

    E-Print Network [OSTI]

    Lau, Chee Keung

    1991-01-01T23:59:59.000Z

    mechanical spectrometer was found to increase with aging time. Correlation was shown to exist between the limiting complex viscosity and the carbonyl area as determined by infrared analysis. The correlation was unique for each asphalt and was independent... of aging temperature. The carbonyl area growth rate was a strong function of the aging temperature and the temperature dependence of the rate constant followed the Arrhenius relation within the temperature range tested. The results led...

  20. Viscosity, relaxation time, and dynamics within a model asphalt of larger molecules

    SciTech Connect (OSTI)

    Li, Derek D.; Greenfield, Michael L., E-mail: greenfield@egr.uri.edu [Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881 (United States)

    2014-01-21T23:59:59.000Z

    The dynamics properties of a new “next generation” model asphalt system that represents SHRP AAA-1 asphalt using larger molecules than past models is studied using molecular simulation. The system contains 72 molecules distributed over 12 molecule types that range from nonpolar branched alkanes to polar resins and asphaltenes. Molecular weights range from 290 to 890 g/mol. All-atom molecular dynamics simulations conducted at six temperatures from 298.15 to 533.15 K provide a wealth of correlation data. The modified Kohlrausch-Williams-Watts equation was regressed to reorientation time correlation functions and extrapolated to calculate average rotational relaxation times for individual molecules. The rotational relaxation rate of molecules decreased significantly with increasing size and decreasing temperature. Translational self-diffusion coefficients followed an Arrhenius dependence. Similar activation energies of ?42 kJ/mol were found for all 12 molecules in the model system, while diffusion prefactors spanned an order of magnitude. Viscosities calculated directly at 533.15 K and estimated at lower temperatures using the Debye-Stokes-Einstein relationship were consistent with experimental data for asphalts. The product of diffusion coefficient and rotational relaxation time showed only small changes with temperature above 358.15 K, indicating rotation and translation that couple self-consistently with viscosity. At lower temperatures, rotation slowed more than diffusion.

  1. Development of asphalts and pavements using recycled tire rubber. Phase 1, Technical feasibility. Technical progress report, September 1, 1994--August 31, 1995

    SciTech Connect (OSTI)

    Bullin, J.A.; Davison, R.R.; Glover, C.J. [and others

    1996-06-01T23:59:59.000Z

    About 285 million tires are discarded every year; less than 100 million are currently being recycled, with the rest being placed in landfills and other waste sites. A solution to reduce the littering of the environment is to use ground tire rubber in road construction. Currently, about 27 million tons of asphalt are used each year in road construction and maintenance of the country`s 2 million miles of roads. If all of the waste tire rubber could be combined with asphalt in road construction, it would displace less than 6% of the total asphalt used each year, yet could save about 60 trillion Btus annually. Purpose of this project is to provide data needed to optimize the performance of rubber-asphalt concretes. The first phase is to develop asphalts and recycling agents tailored for compatibility with ground tire rubber. Chapter 2 presents results on Laboratory Testing and Evaluation: fractionate asphalt material, reblending for aromatic asphalts, verifying optimal curing parameters, aging of blends, and measuring ductilities of asphalt-rubber binders. Chapter 3 focuses on Evaluating Mixture Characteristics (modified binders). Chapter 4 covers Adhesion Test Development (water susceptibility is also covered). The final chapter focuses on the Performance/Economic Update and Commercialization Plan.

  2. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

    E-Print Network [OSTI]

    Petit, Christophe; Canestrari, Francesco; Pannunzio, Valter; Virgili, Amadeo

    2012-01-01T23:59:59.000Z

    Synthetic waxes produced by standard and registered processes may be used to manufacture Warm Mix Asphalt (WMA), which is a modified asphalt concrete produced, applied and compacted at temperatures below those typically required. This feature leads to environmental benefits, such as reduced energy consumption, gas and fume emissions, as well as to economic/operational advantages, such as lower production costs and greater hauling distances for extended construction seasons with tighter schedules. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax with a traditional Hot Mix Asphalt (HMA) specimen, in terms of shear fatigue response and both complex and stiffness moduli. The experimental results and related modeling work demonstrate that adding synthetic wax into the WMA composition does not hinder either the destructive or non-destructive performance of an HMA, and this finding is corroborated by respectively measuring fatigue life and stiffness.

  3. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

    E-Print Network [OSTI]

    Christophe Petit; Anne Millien; Francesco Canestrari; Valter Pannunzio; Amadeo Virgili

    2012-03-13T23:59:59.000Z

    Synthetic waxes produced by standard and registered processes may be used to manufacture Warm Mix Asphalt (WMA), which is a modified asphalt concrete produced, applied and compacted at temperatures below those typically required. This feature leads to environmental benefits, such as reduced energy consumption, gas and fume emissions, as well as to economic/operational advantages, such as lower production costs and greater hauling distances for extended construction seasons with tighter schedules. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax with a traditional Hot Mix Asphalt (HMA) specimen, in terms of shear fatigue response and both complex and stiffness moduli. The experimental results and related modeling work demonstrate that adding synthetic wax into the WMA composition does not hinder either the destructive or non-destructive performance of an HMA, and this finding is corroborated by respectively measuring fatigue life and stiffness.

  4. Establishing material properties for thin asphalt concrete surfaces on granular bases

    E-Print Network [OSTI]

    Rosson, Barry Thomas

    1985-01-01T23:59:59.000Z

    cross-section of a Goodyear Hi -Miler 10. 00-20 14-ply bias truck tire carcass was obtained; the input data for the Tielking tire model was developed by measuring cord locations, angles, and plies on a section of the tire; and the tire pressure.... Since little work in the past has been done in the area of thin asphalt concrete surface analysis, re-evaluation of several assumptions concerning the tire load were necessary. The truck tire pressures on Texas highways have dramatically increased...

  5. The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt

    E-Print Network [OSTI]

    Geiger, Brian James

    2011-10-21T23:59:59.000Z

    mix asphalt (HMA) were investigated in this study. Dilatometer and modified beam tests were performed to determine the possibility of new ASR occurring in reactive aggregates within the HMA or re-expansion of existing gel. The Lottman test... (XRD) was used to check for the potential presence of gel in the filler fraction of the ASR-RCAs. Micro-deval and freeze-thaw tests were evaluated for their potential to indicate the presence of excess micro-cracks or ASR gel. Expansion testing...

  6. Whole House Thermal Performance of Asphalt Shingles Exploiting Special Infrared Reflective Pigments

    E-Print Network [OSTI]

    Hahn, L.; Miller, W.; Desjarlais, A.; Jacobs, J.; Youngquist, A.

    2006-01-01T23:59:59.000Z

    -04 using cycle 4 as described in Table X2.1, Common Exposure Conditions, of the G 154 standard (ASTM 2002b). A UVB-340 lamp was used for simulating direct solar UV radiation; this lamp has no UV output below 300 nm, which is the cutoff wavelength... for this behavior is unknown; overall, however, the data clearly show that the IRR shingles perform just as well when subjected to direct solar UV radiation as standard products accepted on the open market. The IRR asphalt shingles do not lose solar reflectance...

  7. Porous Asphalt Pavement for Stormwater Management The UNH Stormwater Center Web: www.unh.edu/erg/cstev/

    E-Print Network [OSTI]

    Porous Asphalt Pavement for Stormwater Management The UNH Stormwater Center Web: www. Extended Pavement Life Due to Well Drained Base and Reduced Freeze-Thaw Disadvantages · Requires Routine. Standard Pavement Applications where Stormwater Infrastructure is Required · Materials Cost is ~20-25% More

  8. SOURCE: UNIVERSITY OF CALIFORNIA PAVEMENT RESEARCH CENTER FIGURE 1 Moisture-induced stripping in asphalt treated base layer

    E-Print Network [OSTI]

    California at Berkeley, University of

    SOURCE: UNIVERSITY OF CALIFORNIA PAVEMENT RESEARCH CENTER FIGURE 1 Moisture-induced stripping in asphalt treated base layer PAVEMENT TECHNOLOGY UPDATE This Technology Transfer Program publication is provided by the University of California Pavement Research Center. The University of California Pavement

  9. Recycling spent sandblasting grit and similar wastes as aggregate in asphaltic concrete. Technical data sheet

    SciTech Connect (OSTI)

    Heath, J.C.; Nelson, B.

    1998-12-01T23:59:59.000Z

    The Naval Facilities Engineering Service Center (NFESC), Port Hueneme, California, and Naval Facilities Engineering Command Engineering Field Activity, West, San Bruno, California, took overall leadership in identifying and testing methods to manage waste generated from a machine shop located at Hunters Point Annex, at Naval Station, Treasure Island, California. Ship cleaning and equipment maintenance resulted in the accumulation of 4,665 tons of spent sandblasting grit at the site. The spent grit, consisting of silica sand plus a small amount of slag-derived grit, had the physical characteristics of coarse-grained beach sand and also contained fragments of coatings. The spent grit had the potential for exhibiting hazardous characteristics since the coatings included lead-based primers, copper, and butyltin-containing antifouling topcoats. The most beneficial application of reusing the spent grit was to use it as a replacement for some of the fine aggregate in asphaltic concrete. A test program was established that included characterization, bench-scale testing, long-term pilot scale testing, and a full-scale demonstration. Full-scale asphalt production provided samples which proved both the chemical leaching resistance and physical performance characteristics were acceptable.

  10. Excess Foundry Sand Characterization and Experimental Investigation in Controlled Low-Strength Material and Hot-Mixing Asphalt

    SciTech Connect (OSTI)

    Paul J. Tikalsky, Hussain U. Bahia, An Deng and Thomas Snyder

    2004-10-15T23:59:59.000Z

    This report provides technical data regarding the reuse of excess foundry sand. The report addresses three topics: a statistically sound evaluation of the characterization of foundry sand, a laboratory investigation to qualify excess foundry sand as a major component in controlled low-strength material (CLSM), and the identification of the best methods for using foundry sand as a replacement for natural aggregates for construction purposes, specifically in asphalt paving materials. The survival analysis statistical technique was used to characterize foundry sand over a full spectrum of general chemical parameters, metallic elements, and organic compounds regarding bulk analysis and leachate characterization. Not limited to characterization and environmental impact, foundry sand was evaluated by factor analyses, which contributes to proper selection of factor and maximization of the reuse marketplace for foundry sand. Regarding the integration of foundry sand into CLSM, excavatable CLSM and structural CLSM containing different types of excess foundry sands were investigated through laboratory experiments. Foundry sand was approved to constitute a major component in CLSM. Regarding the integration of foundry sand into asphalt paving materials, the optimum asphalt content was determined for each mixture, as well as the bulk density, maximum density, asphalt absorption, and air voids at Nini, Ndes, and Nmax. It was found that foundry sands can be used as an aggregate in hot-mix asphalt production, but each sand should be evaluated individually. Foundry sands tend to lower the strength of mixtures and also may make them more susceptible to moisture damage. Finally, traditional anti-stripping additives may decrease the moisture sensitivity of a mixture containing foundry sand, but not to the level allowed by most highway agencies.

  11. Excess Foundry Sand Characterization and Experimental Investigation in Controlled Low-Strength Material and Hot-Mixing Asphalt

    SciTech Connect (OSTI)

    Pauul J. Tikalsky

    2004-10-31T23:59:59.000Z

    This report provides technical data regarding the reuse of excess foundry sand. The report addresses three topics: (1) a statistically sound evaluation of the characterization of foundry sand, (2) a laboratory investigation to qualify excess foundry sand as a major component in controlled low-strength material (CLSM), and (3) the identification of the best methods for using foundry sand as a replacement for natural aggregates for construction purposes, specifically in asphalt paving materials. The survival analysis statistical technique was used to characterize foundry sand over a full spectrum of general chemical parameters, metallic elements, and organic compounds regarding bulk analysis and leachate characterization. Not limited to characterization and environmental impact, foundry sand was evaluated by factor analyses, which contributes to proper selection of factor and maximization of the reuse marketplace for foundry sand. Regarding the integration of foundry sand into CLSM, excavatable CLSM and structural CLSM containing different types of excess foundry sands were investigated through laboratory experiments. Foundry sand was approved to constitute a major component in CLSM. Regarding the integration of foundry sand into asphalt paving materials, the optimum asphalt content was determined for each mixture, as well as the bulk density, maximum density, asphalt absorption, and air voids at N{sub ini}, N{sub des}, and N{sub max}. It was found that foundry sands can be used as an aggregate in hot-mix asphalt production, but each sand should be evaluated individually. Foundry sands tend to lower the strength of mixtures and also may make them more susceptible to moisture damage. Finally, traditional anti-stripping additives may decrease the moisture sensitivity of a mixture containing foundry sand, but not to the level allowed by most highway agencies.

  12. Two- and Three-Dimensional Microstructural Modeling of Asphalt Particulate Composite Materials using a Unified Viscoelastic-Viscoplastic-Viscodamage Constitutive Model

    E-Print Network [OSTI]

    You, Taesun

    2013-08-13T23:59:59.000Z

    The main objective of this study is to develop and validate a framework for microstructural modeling of asphalt composite materials using a coupled thermo-viscoelastic, thermo-viscoplastic, and thermo-viscodamage constitutive model. In addition...

  13. Use of shredded tires in the subbase layer of asphalt pavements

    SciTech Connect (OSTI)

    Papp, W.J. Jr.; Maher, M.H. [Rutgers Univ., Piscataway, NJ (United States). Dept. of Civil and Environmental Engineering; Baker, R.F. [New Jersey Dept. of Transportation, Trenton, NJ (United States)

    1997-12-31T23:59:59.000Z

    Research was conducted on the use of shredded scrap tires for use in the subbase layer of asphalt pavements. Mixtures of shredded scrap tires with virgin soil provide a means of recycling unwanted tires and conserving a finite supply of virgin soil. The mechanistic procedure for the design of pavement systems requires resilient modulus values. Plastic and elastic strains were measured using external LVDT`s and internal proximity sensors. Resilient modulus measurements were conducted on cohesionless soils mixed with various amounts of shredded tire chips. The performance f the shredded tire mixture is compared to that of the naturally occurring virgin soil used in subbase applications in New Jersey. A number of experimental issues are discussed such as: method of compaction, optimum ratio of shredded tire chips to soil, optimum size and gradation of shredded tire chips, and strength testing using California Bearing Ratio.

  14. Surfactant loss control in chemical flooding: Spectroscopic and calorimetric study of adsorption and precipitation on reservoir minerals. [Alkyl phenoxy polyoxyether type nonionic surfactants and anionic meta xylene sulfonates

    SciTech Connect (OSTI)

    Somasundaran, P.

    1993-02-01T23:59:59.000Z

    The aim of this project is to elucidate the mechanisms of adsorption and surface precipitation of flooding surfactants on reservoir minerals. Effect of surfactant structure, surfactant combinations and other inorganic and polymeric species will also be determined using solids of relevant mineralogy. A multi-pronged approach consisting of micro nano spectroscopy, microcalorimetry, electrokinetics, surface tension and wettability will be used to achieve the goals. The results of this study should help in controlling surfactant loss in chemical flooding and also in developing optimum structures and conditions for efficient chemical flooding processes. Adsorption of selected individual surfactants on oxide minerals was determined. The aim was to characterize the microstructure of the adsorbed layers. Work was began with alkyl phenoxy polyoxyether type nonionic surfactants and anionic meta xylene sulfonates.

  15. Recycled brake linings as partial aggregate substitute in asphalt paving. Construction and final report. Report for July 1992-August 1996

    SciTech Connect (OSTI)

    Miller, P.A.; Sukley, R.

    1996-09-01T23:59:59.000Z

    The purpose of this project was to evaluate the performance of asphalt containing various percentages of brake lining as an aggregate, and compare its performance to that of normal asphalt containing natural aggregate. This project is an effort to explore alternate ways to use waste product. Four test section of FB-2 Modified mix containing brake lining materials were placed in July 1992 along with one control section on SR 3022 in Mercer county. To date all sections are performing satisfactory, and Brake linings should be recommended as a viable partial replacement of aggregate in bituminous materials. This study only considered the performance of only off-spec brake linings, therefore, any performance data or enviromental effects of placement of used brake material should be addressed.

  16. Electrochemical assessment and service-life prediction of mechanically stabilized earth walls backfilled with crushed concrete and recycled asphalt pavement

    E-Print Network [OSTI]

    Esfeller, Michael Watts, Jr.

    2009-06-02T23:59:59.000Z

    Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 2006 Major Subject: Civil Engineering ELECTROCHEMICAL ASSESSMENT AND SERVICE-LIFE PREDICTION... OF MECHANICALLY STABILIZED EARTH WALLS BACKFILLED WITH CRUSHED CONCRETE AND RECYCLED ASPHALT PAVEMENT A Thesis by MICHAEL WATTS ESFELLER, JR. Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  17. Value-added utilisation of recycled concrete in hot-mix asphalt

    SciTech Connect (OSTI)

    Wong, Yiik Diew [School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Sun, Darren Delai [School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore)]. E-mail: ddsun@ntu.edu.sg; Lai, Dickson [School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore)

    2007-07-01T23:59:59.000Z

    The feasibility of partial substitution of granite aggregate in hot-mix asphalt (HMA) with waste concrete aggregate was investigated. Three hybrid HMA mixes incorporating substitutions of granite fillers/fines with 6%, 45% untreated, and 45% heat-treated concrete were evaluated by the Marshall mix design method; the optimum binder contents were found to be 5.3%, 6.5% and 7.0% of grade Pen 60/70 bitumen, respectively. All three hybrid mixes satisfied the Marshall criteria of the Singapore Land Transport Authority (LTA) W3B wearing course specification. The hybrid mix with 6% concrete fillers gave comparable resilient modulus and creep resistance as the conventional W3B mix, while hybrid mixes with higher concrete substitutions achieved better performance. X-ray diffraction (XRD) showed the distinct presence of free lime in the heat-treated concrete, while the scanning electron microscope (SEM) provided an in-depth perspective of the concrete grains in the HMA matrix. The results suggest feasible use of waste concrete as partial aggregate substitution in HMA.

  18. A study of substitution solvents in asphalt fume extraction and the effects of heating duration and temperature

    E-Print Network [OSTI]

    Curry, Noel Thomas

    1981-01-01T23:59:59.000Z

    (denoted Dl). Duration two ( D2) ran from time 60 minutes to time 90 minutes, Dl and DZ were separated by a 30 minute period in wh i ch no sampling occurred. The total time of heati ng at this temperature range was 90 minutes, which was near the limit... of the filter to hold it in position, and the cassette cap was placed on top of this. 3oth ends were then plugged. (Figure 2) After a warming period of approximately 30 minutes, the temperature of the liquid asphalt was raised to 250 C. iihen it reached...

  19. A novel technique for the production of cool colored concrete tile and asphalt shingle roofing products

    SciTech Connect (OSTI)

    Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul; Wood, Kurt; Skilton, Wayne; Petersheim, Jerry

    2009-11-20T23:59:59.000Z

    The widespread use of solar-reflective roofing materials can save energy, mitigate urban heat islands and slow global warming by cooling the roughly 20% of the urban surface that is roofed. In this study we created prototype solar-reflective nonwhite concrete tile and asphalt shingle roofing materials using a two-layer spray coating process intended to maximize both solar reflectance and factory-line throughput. Each layer is a thin, quick-drying, pigmented latex paint based on either acrylic or a poly(vinylidene fluoride)/acrylic blend. The first layer is a titanium dioxide rutile white basecoat that increases the solar reflectance of a gray-cement concrete tile from 0.18 to 0.79, and that of a shingle surfaced with bare granules from 0.06 to 0.62. The second layer is a 'cool' color topcoat with weak near-infrared (NIR) absorption and/or strong NIR backscattering. Each layer dries within seconds, potentially allowing a factory line to pass first under the white spray, then under the color spray. We combined a white basecoat with monocolor topcoats in various shades of red, brown, green and blue to prepare 24 cool color prototype tiles and 24 cool color prototypes shingles. The solar reflectances of the tiles ranged from 0.26 (dark brown; CIELAB lightness value L* = 29) to 0.57 (light green; L* = 76); those of the shingles ranged from 0.18 (dark brown; L* = 26) to 0.34 (light green; L* = 68). Over half of the tiles had a solar reflectance of at least 0.40, and over half of the shingles had a solar reflectance of at least 0.25.

  20. Asphaltenes and Asphalts, 2. Developments in Petroleum Science, 40 B edited by T.F. Yen and G.V. Chilingarian

    E-Print Network [OSTI]

    Ã?agin, Tahir

    Asphaltenes and Asphalts, 2. Developments in Petroleum Science, 40 B edited by T.F. Yen and G OF ASPHALTENES: A PREDICTIVE APPROACH BASED ON COMPUTER ASSISTED STRUCTURE ELUCIDATION AND ATOMISTIC SIMULATIONS, asphaltenes and resins [1­4]. Asphaltenes are operationally defined as the non-volatile and polar fraction

  1. Utilize Cementitious High Carbon Fly Ash (CHCFA) to Stabilize Cold In-Place Recycled (CIR) Asphalt Pavement as Base Coarse

    SciTech Connect (OSTI)

    Wen, Haifang; Li, Xiaojun; Edil, Tuncer; O'Donnell, Jonathan; Danda, Swapna

    2011-02-05T23:59:59.000Z

    The purpose of this study was to evaluate the performance of cementitious high carbon fly ash (CHCFA) stabilized recycled asphalt pavement as a base course material in a real world setting. Three test road cells were built at MnROAD facility in Minnesota. These cells have the same asphalt surface layers, subbases, and subgrades, but three different base courses: conventional crushed aggregates, untreated recycled pavement materials (RPM), and CHCFA stabilized RPM materials. During and after the construction of the three cells, laboratory and field tests were carried out to characterize the material properties. The test results were used in the mechanistic-empirical pavement design guide (MEPDG) to predict the pavement performance. Based on the performance prediction, the life cycle analyses of cost, energy consumption, and greenhouse gasses were performed. The leaching impacts of these three types of base materials were compared. The laboratory and field tests showed that fly ash stabilized RPM had higher modulus than crushed aggregate and RPM did. Based on the MEPDG performance prediction, the service life of the Cell 79 containing fly ash stabilized RPM, is 23.5 years, which is about twice the service life (11 years) of the Cell 77 with RPM base, and about three times the service life (7.5 years) of the Cell 78 with crushed aggregate base. The life cycle analysis indicated that the usage of the fly ash stabilized RPM as the base of the flexible pavement can significantly reduce the life cycle cost, the energy consumption, the greenhouse gases emission. Concentrations of many trace elements, particularly those with relatively low water quality standards, diminish over time as water flows through the pavement profile. For many elements, concentrations below US water drinking water quality standards are attained at the bottom of the pavement profile within 2-4 pore volumes of flow.

  2. Rutting Performance of Airport Hot-Mix Asphalt Characterized by Laboratory Performance Testing, Full-Scale Accelerated Pavement Testing, and Finite Element Modeling

    E-Print Network [OSTI]

    Rushing, John Ford

    2014-04-25T23:59:59.000Z

    California Bearing Ratio DoD Department of Defense DSR Dynamic Shear Rheometer ERDC U.S. Army Engineer Research and Development Center FAA Federal Aviation Administration FN flow number FT flow time HMA Hot Mix Asphalt HVS heavy vehicle simulator... aircraft continue to necessitate modifications in the procedures by which HMA mixtures are designed so that rutting does not become a prevalent distress on airport pavements. The Federal Aviation Administration (FAA) has predominantly required use...

  3. Broad specificity dioxygenase enzymes and the bioremediation of hazardous aromatic pollutants

    SciTech Connect (OSTI)

    Bonus, P.A.; Nies, L. [Purdue Univ., West Lafayette, IN (United States)

    1996-11-01T23:59:59.000Z

    The release of aromatic compounds to the environment is a major source of global pollution. In particular, the contamination of soil and groundwater with benzene, toluene, and xylenes (BTX) is the most ubiquitous form of aromatic pollution. The major source of BTX contamination is the release of gasoline and other petroleum products. This research focused on the improvement of bioremediation of BTX through a better understanding of broad specificity dioxygenase enzymes produced by soil and sediment bacteria. The investigation utilized pure bacterial strains isolated on biphenyl, naphthalene, or toluene. These isolated aerobic bacteria were then used to investigate the specificity of the initial enzymatic attack on aromatic compounds including BTX and polychlorinated biphenyls (PCBs). The enzymatic specificity and competency of the five isolates selected for study were determined through the use of growth tests and two rapid assay techniques. The growth tests were conducted on mineral agar plates or in liquid cultures, and they were used to determine substrate specificity. In addition, rapid assays for both BTX and PCBs were carried out using various growth substrates. These assays allowed further clarification of the specificity of the dioxygenase enzymes involved in aromatic degradation. Preliminary results of the PCB assay show that biphenyl and naphthalene isolated organisms grown on biphenyl, benzoate, naphthalene, and succinate maintain production of broad specificity dioxygenase enzymes able to degrade PCBs. Likewise, the BTX assay confirms that biphenyl and naphthalene selected organisms grown on their respective selection substrates completely degrade BTX including all three xylene isomers. In comparison, the toluene selected organism that was studied was unable to degrade PCBs, but it was able to degrade all BTX constituents.

  4. SOLAR HEATING OF TANK BOTTOMS Application of Solar Heating to Asphaltic and Parrafinic Oils Reducing Fuel Costs and Greenhouse Gases Due to Use of Natural Gas and Propane

    SciTech Connect (OSTI)

    Eugene A. Fritzler

    2005-09-01T23:59:59.000Z

    The sale of crude oil requires that the crude meet product specifications for BS&W, temperature, pour point and API gravity. The physical characteristics of the crude such as pour point and viscosity effect the efficient loading, transport, and unloading of the crude oil. In many cases, the crude oil has either a very high paraffin content or asphalt content which will require either hot oiling or the addition of diluents to the crude oil to reduce the viscosity and the pour point of the oil allowing the crude oil to be readily loaded on to the transport. Marginal wells are significantly impacted by the cost of preheating the oil to an appropriate temperature to allow for ease of transport. Highly paraffinic and asphaltic oils exist throughout the D-J basin and generally require pretreatment during cold months prior to sales. The current study addresses the use of solar energy to heat tank bottoms and improves the overall efficiency and operational reliability of stripper wells.

  5. Influence of vehide traffic reduction in a town centre on BTX polhition Isabelle ZDANEVITCH a

    E-Print Network [OSTI]

    Boyer, Edmond

    et Pollution de l'Air", Avignon : France (2000)" #12;1. Objectives It seems obvious that with limited centres. According to that scheine, WERIS, m association wifh the local Air Qualily Moniforing Nefwork A1 clearly indicates traffic äs the main source of atmospheric pollution. Measured benzene levels over the 3

  6. Variability of hot mix asphalt produced with reclaimed asphalt pavement

    E-Print Network [OSTI]

    Yang, Guiqin

    1999-01-01T23:59:59.000Z

    percent does not significantly influence the mix variability; it is desirable to use a large percentage of RAP in the Type S-I mix, i.e., more than 40% RAP; iii) On the average, the aggregate variability increases after transportation and stockpiling...

  7. Chemical characterization of beach asphalts

    E-Print Network [OSTI]

    May, Lloyd Alexander

    1973-01-01T23:59:59.000Z

    and flameless atomic absorption spectroscopy for vanadium, nickel, and iron. The neutron activation procedure was shown to be superior for vanadium, but no significant difference in methods was noted for nickel and iron. Other trace metals were done... by activation analysis. These include: mercury, gold, chromium, bromine, zinc, scandium, cobalt, and antimony. Use of the vanadium to nickel ratio, and of other trace element data, was discussed. As a key to understanding the nature of vanadium in crude...

  8. Winter Maintenance Guidelines for Porous Asphalt Maintenance

    E-Print Network [OSTI]

    environmental impact. · Apply deicing treatments during, and after storms as necessary to control compact snow and ice not removed by plowing. · Sand application should be limited since its use will increase the need

  9. Cracking Resistance of Asphalt Rubber Mix Versus

    E-Print Network [OSTI]

    Mobasher, Barzin

    . crack length curve for KR #12;Load vs. CMOD 0.0 0.5 1.0 1.5 2.0 Crack mouth opening, mm 0 500 1000 1500 non-linear fracture mechanics ·Compliance approach ·R-Curve approach #12;Conventional Fatigue Testing factor R-Curve approach Resistance to initiation & growth of cracks Evaluates fracture toughness

  10. Asphalt, Concrete, and Turf Maintenance and Preservation

    E-Print Network [OSTI]

    Minnesota, University of

    preventive maintenance, pavement distress and identification, and best practices for the maintenance Consultant WSB and Associates, Inc. 763-287-7184 jstewart@wsbeng.com #12;2 Preventive Maintenance Preventive maintenance and minor rehab, and is often used to repair environmental damage. Preventive maintenance narrows

  11. Anisotropic Characterization of Asphalt Mixtures in Compression 

    E-Print Network [OSTI]

    Zhang, Yuqing 1983-

    2012-10-08T23:59:59.000Z

    and physically related to anisotropic modulus ratio. The anisotropic viscoelasticity was represented by complex moduli and Poisson's ratios in separate orthogonal directions that were determined by an efficient testing protocol. Master curve models were proposed...

  12. Microstructural viscoplastic continuum model for asphalt concrete 

    E-Print Network [OSTI]

    Tashman, Laith

    2004-09-30T23:59:59.000Z

    test. A comprehensive experiment was conducted to systematically determine the model parameters and the evolution laws that describe AC hardening, anisotropy, and damage. The experiment consisted of a set of compressive triaxial strength tests...

  13. ORIGINAL CONTRIBUTION Rheological characterization of asphalt

    E-Print Network [OSTI]

    Mather, Patrick T.

    compared favorably with those obtained using conventional parallel-plate torsional flow in a commercial and are aggregates of polar aromatic compounds (Maruska and Rao 1987). Maltenes are nonpolar aliphatic hydrocarbons time (Anderson and Marasteanu 1999). Because of their codification, the conventional tests

  14. Cool Asphalt Shingles | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China U.S. DepartmentEnergy This partAs theFebruary09Contractor(DOE's)|ScottBerkeley

  15. The effects of asphalt binder oxidation on hot mix asphalt concrete mixture rheology and fatigue performance

    E-Print Network [OSTI]

    Jung, Sung Hoon

    2009-06-02T23:59:59.000Z

    .................................................. 108 Figure V-11. VE Function Map of Yoakum Mixtures .............................................. 108 Figure V-12. VE Function versus DSR Function ...................................................... 110 Figure V-13. Hirsch Model from Bryan PP2... Binder................................................. 112 xiv Page Figure V-14. Comparison between Bryan Mixture PP2 and Hirsch Model. ............. 113 Figure V-15. Comparison between Yoakum Mixture PP2 and Hirsch Model.......... 114 Figure...

  16. Identification of asphalt binder properties that affect cracking performance of hot mixed asphalt concrete pavements

    E-Print Network [OSTI]

    Hastings, Charles Patrick

    1997-01-01T23:59:59.000Z

    Specimen Failing in Indirect Tension Fatigue Cracking as a Function of Time for Texarkana Test Pavements 17 17 19 Figure 10. Figure I l. Figure 12. Texarkana EVA Test Section Texarkana Latex Test Section . Reflective Cracking as a Function... Results for Carbon Black Illustrating Increase in Molecular Size 69 Figure B5. Sherman GPC Results for Control Illustrating Increase in Molecular Size . 70 Page Figure B6. Sherman GPC Results for EVA Illustrating Increase in Molecular Size 70 Figure...

  17. Prediction of Asphalt Mixture Compactability from Mixture, Asphalt, and Aggregate Properties

    E-Print Network [OSTI]

    Muras, Andrew J.

    2010-07-14T23:59:59.000Z

    . Predicted Plot of CV Neural Net of Entire Data Set for a ............................ 50 Figure 32. Predicted Plot of CV Neural Net of Entire Data Set for AV Nini ................... 51 Figure 33. a versus Predicted a... ................................................... 24 Table 5 HMA Mixing and Compaction Temperatures ............................................. 27 Table 6 Compaction Parameters a, c, and AV Nini ................................................... 38 Table 7 Compaction Parameters m1, m2...

  18. Effect of viscosity of asphalt on stress strain and volume change characteristics of asphaltic mixtures

    E-Print Network [OSTI]

    Gandhi, Poduru Mohandas Karamchand

    1966-01-01T23:59:59.000Z

    Raages for Cannonading Vacuum Capillary Viscometers Viscosities at 140 F and 275 F Using Capillary V iscaaetar Rxpaasion of Triaxial Cell Mith Time At Various pressures 10 Typical Triaxial Test Data 11 Typical Triaxial Test Data 12 Typical... and the top loading cap was placed in position. 2. The circumferential surfaces of base plate and loading cap mre covered with high vacuum silicone grease. 3, The rubber membrane suitable for four inch diameter samples was placed over the speciamn using a...

  19. Activated carbon cleanup of the acid gas feed to Claus sulfur plants

    SciTech Connect (OSTI)

    Harruff, L.G.; Bushkuhl, S.J. [Saudi Aramco, Dhahran (Saudi Arabia)

    1996-12-31T23:59:59.000Z

    This paper presents the details of a recently developed novel process using activated carbon to remove hydrocarbon contaminants from the acid gas feed to Claus sulfur recovery units. Heavy hydrocarbons, particularly benzene, toluene and xylene (BTX) have been linked to coke formation and catalyst deactivation in Claus converters. This deactivation results in reduced sulfur recovery and increased sulfur emissions from these plants. This effect is especially evident in split flow Claus plants which bypass some of the acid gas feed stream around the initial combustion step because of a low hydrogen sulfide concentration. This new clean-up process was proven to be capable of removing 95% of the BTX and other C{sub 6}{sup +} hydrocarbons from acid gas over a wide range of actual plant conditions. Following the adsorption step, the activated carbon was easily regenerated using low pressure steam. A post regeneration drying step using plant fuel gas also proved beneficial. This technology was extensively pilot tested in Saudi Aramco`s facilities in Saudi Arabia. Full scale commercial units are planned for two plants in the near future with the first coming on-line in 1997. The process described here represents the first application of activated carbon in this service, and a patent has been applied for. The paper will discuss the pilot plant results and the issues involved in scale-up to commercial size.

  20. High Btu gas from peat. A feasibility study. Part 3. Market analysis. Task 8. Final report

    SciTech Connect (OSTI)

    Not Available

    1982-01-01T23:59:59.000Z

    The primary objective of this task, which was the responsibility of the Minnesota Gas Company, was to identify and characterize the market potential for the plant by-products - BTX (mixture of benzene, toluene and xylene), phenol, ammonia, sulfur, and sodium sulfate - and to assign value to them. Although traditionally a growth industry, the chemicals market has been generally weakened by the recession, and is experiencing back to back years of declining production. This is due to bad health of specific end uses, such as fertilizer from ammonia. In the long run, this trend is expected to moderate. It is felt that the proposed peat plant has a favorable position in the markets of each of its by-products. This is due to the synergism with nearby industries which are major consumers of these by-products. In the case of sulfur and ammonia, the Red River agricultural area is a large potential market. For sodium sulfate, phenols and perhaps BTX, the nearby paper and timber products industries are large potential markets. The values for these by-products used in the financial analysis were intentionally conservative. This is because of the uncertainty in the quantity and quality. More tests are needed in an integrated facility in order to determine these factors and the variability of each. This is particularly true of the by-product oils which could vary significantly with operating conditions and may even require alternate processing schemes. 18 references, 9 figures, 14 tables.

  1. Understanding orchestrated chemical reactions in toluene/o-xylene monooxygenase from pseudomonas sporium OX1

    E-Print Network [OSTI]

    Song, Woon Ju

    2011-01-01T23:59:59.000Z

    Chapter 1. Geometric and Functional Versatility of Carboxylate-Bridged Nonheme- Diiron Motifs: sMMO and ToMO. Several metalloenzymes utilize a carboxylate-bridged non-heme diiron motif for dioxygen activation. Despite their ...

  2. Naphthalene and o-Xylene Adsorption onto High Carbon Fly Ash

    E-Print Network [OSTI]

    Aydilek, Ahmet

    electricity, resulting in the generation of vast quantities of coal combustion by-products. One of these by for the treatment of groundwater con- taining both organic and inorganic pollutants (Guerin et al. 2002; Jenk et al. 2003; Long et al. 2008). Approximately 90% of the coal used in the United States is burned to produce

  3. Optimal synthesis of p-xylene separation processes based on crystallization technology

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    that arises in hybrid designs where the first step is commonly performed by adsorption. A novel superstructure) adsorption, or (3) a hybrid crystallization/adsorption process.1 Distillation is not a competitive technology) resulting in columns with high reflux ratios and a large number of trays. Table 1 Adsorption

  4. The atmospheric release of benzene, toluene, ethylbenzene, and xylene from contaminated soils

    E-Print Network [OSTI]

    Ramsey, Ronald Roland

    1993-01-01T23:59:59.000Z

    ,000 sites will be reported leaking by 1997. The Environmental Protection Agency (EPA) estimates that it will take 20 to 30 years and an average of $ 1 00, 000 to $400, 000 per site to remediate all sites. Many techniques have been developed...

  5. www.rsc.org/analyst The airliquid interface of benzene, toluene, m-xylene, and

    E-Print Network [OSTI]

    ANALYST FULLPAPER THE www.rsc.org/analyst The air­liquid interface of benzene, toluene, m as an Advance Article on the web 10th April 2003 The air­liquid interface and the liquid-phase of benzene-zero hyperpolarizabilities of benzene and 1,3,5-trimethylbenzene. The orientation of the aromatic rings of these compounds

  6. Effect of density on the stability of asphaltic concrete mixtures

    E-Print Network [OSTI]

    Subbaraju, Bhupatiraju

    1953-01-01T23:59:59.000Z

    Test, The Rarohall Stabi- lity Tost as8 The Califorsia Co beeiemtor Tost, fer Series I 8 as Chtai ass by 'Tbo Marshall Cosyae- tios Preoo8lro ~ ~ ~ s ~ ~ ~ ~ ~ ~ ~ ~ ~ Rela4ioaship boteeea Doss ity aas Sta- bility as RoaeereS by Tbs Rroea... Stability Tost, the Marshall Rishi lity Test as& Tho CaliforaLa Cshesie astor Test, for Series L 8 as Cbtaiaed by The Tease RLShoay Royartseat Cea- Ssotioa Pfiso8ere ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Relatioaehiy beieses Qeasity as8 8ta- bLlity as Reassros...

  7. Toward an Improved Model of Asphalt Binder Oxidation in Pavements

    E-Print Network [OSTI]

    Prapaitrakul, Nikornpon

    2011-02-22T23:59:59.000Z

    and oxygen transport model, coupled with binder reaction kinetics, provides the basis for such calculations. A one-dimensional thermal transport model, coupled with site-specific model parameters and recent improvements in the availability of required input...

  8. Relationship between composition and performance of asphalt recycling agents

    E-Print Network [OSTI]

    Peterson, Gerald Dean

    1993-01-01T23:59:59.000Z

    of oxidation. It was determined that asphaltenes had a negative effect both on the viscosity and the rate of increase of viscosity, trace metals had no obvious effect, waxes had a negative effect on viscosity, and oils had a positive effect on viscosity...

  9. Effect of airblowing on the durability of asphalt paving cements

    E-Print Network [OSTI]

    Tolson, Ronald Geoffrey

    1962-01-01T23:59:59.000Z

    to become more pronounced as the environments harden the material. The problem is to decide at what rate of shear or shearing stress should the viscosity be calculated so that changes in consistency can be most satisfactorily determined and compared... in this investigation were calcu- lated by both methods. Generally, using both methods it was found that the same trends in comparative data exist; only the magnitude of the viscosities and relative viscosities change. For simplification and to avoid confusion -2...

  10. Toxic species emissions from controlled combustion of selected paving asphalts 

    E-Print Network [OSTI]

    Mendez, Carlos Luis

    1993-01-01T23:59:59.000Z

    Table XIII. Gas Analysis Results for Material ACT-2 Using Method 1 . . . 46 Table XIV. Approximate Yield (liter/kg) of NOx from Materials AC-10A, AC-10B, AC-10C, AR4%-B, AR10%-B and AR18%-B 48 Table XV. Approximate Yield (liter/kg) of SO2 from... 53 LIST OF TABLES (Continued) Table XIX. Smoke Mass Results for Material AC-5B . . . Table XX. Smoke Mass Results for Material AR10%-B . . Table XXI. Coefficient of Variation for Materials AC-10A, AC-10B, AC-10C, AC-5B and AR10%-B. Table XXII...

  11. asphalt recycling agency: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the IEA R&D Wind's Topical expert meeting on Material recycling and life cycle analysis (LCA) of wind turbines 259 The Randomness Recycler Approach to Perfect James Allen Fill...

  12. asphalt recycling agents: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the IEA R&D Wind's Topical expert meeting on Material recycling and life cycle analysis (LCA) of wind turbines 235 The Randomness Recycler Approach to Perfect James Allen Fill...

  13. Toxic species emissions from controlled combustion of selected paving asphalts

    E-Print Network [OSTI]

    Mendez, Carlos Luis

    1993-01-01T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . . List of Materials Analyzed . Size Ranges and Effective Cut Off Diameters of the Andersen 2000 Inc. Cascade Impactor. . . . , . . . , . . . . . . . . . . . . . . . . . . 35 Gas Analysis Results for Material AC-IOA Using Method 1. . 38 Table VI. Gas... Analysis Results for Material AC-10B Using Method I . . 39 Table VII. Gas Analysis Results for Material AC-10C Using Method I . . 40 Table VIII. Gas Analysis Results for Material AC-5B Using Method I . . . 41 Table IX. Gas Analysis Results for Material...

  14. Complex Modulus Prediction of Asphalt Concrete Pavement Cores 

    E-Print Network [OSTI]

    Ling, Meng

    2013-12-02T23:59:59.000Z

    . For field cores complex modulus measuring methods, except some expensive pavement field testers, empirical and semiempirical models are widely used, but an accurate mechanical test method is more desired. In this research, Arizona, Yellowstone National Park...

  15. Settling of rubber particles in asphalt-rubber blends

    E-Print Network [OSTI]

    Wattanachai, Piyachat

    1998-01-01T23:59:59.000Z

    -rubber weights and the undissolved rubber weights of sample 10/27/97 . . . 38 II-8 Schematic of the Superpave~ test equipment. . . . . . . 40 11-9 The Superpave? performance grade specification. . . . . Ill-l The GPC chromatogram of neat Exxon AC-10... Corhett Results Asphaltenes Saturates Naphthene Aromatics Polar Aromatics Exxon AC-10 10 1% 11 6% 46. 2% 30. 7% Resin D 3. 5% 17. 8% 54. 8% 21. 6% Vacuum Tower Bottom 17. 3% 20. 2% 45. 2% 18 4o/(, SHRP ABM-1' 7. 1% 9, 0% 29 6% 52...

  16. asphalt fatigue testing: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    introduced to study both phe-nomena. The identification procedure is applied to a dual-phase steel. c 2001 Acade?mie des sciences Editions scientifiques et me?dicales Elsevier...

  17. asphalt stripping final: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a cylindrical surface, both of a finite and infinite heigth, threaded by a magnetic flux, and a straight strip which supports a potential independent of the transverse...

  18. Evaluation of Laboratory Conditioning Protocols for Warm-Mix Asphalt

    E-Print Network [OSTI]

    Yin, Fan 1990-

    2012-10-26T23:59:59.000Z

    orientation of field cores and on-site PMLC specimens were evaluated using the Dynamic Shear Rheometer (DSR) (AASHTO T315) and image analysis techniques, respectively. In addition, mixture stiffness in a wet condition was evaluated using the Hamburg Wheel...

  19. asphalt pavement materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    pavement materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Cost-Effectiveness of Crack Sealing...

  20. asphalt emulsion manufacturers: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    microfluidic devices are also used to generate picoliter-scale water-in-oil emulsions at rates as high as 10 000 drops per second. These emulsions have great potential as...

  1. Imparting Electrical Conductivity into Asphalt Composites Using Graphite

    E-Print Network [OSTI]

    Baranikumar, Aishwarya

    2013-07-09T23:59:59.000Z

    for the degree of MASTER OF SCIENCE Chair of Committee, Philip Park Committee Members, Nasir Gharaibeh Mohammad Naraghi Head of Department, John Niedzwecki August 2013 Major Subject: Civil Engineering Copyright 2013 Aishwarya Baranikumar... into a more professional researcher and further extended my desire to achieve high standards in work quality. I would like to express my thanks to my committee members, Dr. Nasir Gharaibeh and Dr. Mohammad Naraghi for their time, valuable suggestions...

  2. Study of properties of sand asphalt using a torsional rheometer

    E-Print Network [OSTI]

    Kasula, Lavan Kumar Reddy

    2004-11-15T23:59:59.000Z

    multiple natural configurations (multiple stress free states) to derive the constitutive equations. Recently an Orthogonal Rheometer was built to characterize the granular solids by Gupta and Rajagopal which was later used by Baek in the torsional mode...

  3. Complex Modulus Prediction of Asphalt Concrete Pavement Cores

    E-Print Network [OSTI]

    Ling, Meng

    2013-12-02T23:59:59.000Z

    Complex modulus is one of the key parameters in the Mechanistic-Empirical Pavement Design Guide (MEPDG). The purpose of this study is to implement an accurate and high-efficiency mechanical method to measure and calculate the complex modulus...

  4. Methodology for predicting asphalt concrete overlay life against reflection cracking

    E-Print Network [OSTI]

    Jayawickrama, Priyantha Warnasuriya

    1985-01-01T23:59:59.000Z

    of thermal expansion = change in temperature E K - (so gT) vc/h F3(c/h) +(I-u ) By defining, !40) (41) Jc/h F3(c/h) T Kt (42 ) 29 ~Summa r The proper variables to be used in a design equation and the form of the equation to be used is best... obtained are presented in this chapter. The stress intensity factor computations were carr1ed out for different crack-tip positions and for different levels of aggregate interlock act1on. These results were obtained for each of the three mechanisms...

  5. asphalt rubber mixtures: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jerry G. Murphy 2013-01-23 112 Material: Recycled Rubber from Tires, Industrial Scrap CiteSeer Summary: using the ambient desert heat (160-220F). The process was brought...

  6. asphalt roofing shingles: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and could increase the life of the roof product. However, determining the effects of climate and solar exposure on reflectance and color variability over time is of...

  7. asphalt plants truck: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    pricing. This, in turn, negatively...-product of the olefins cracking process. This off-gas is routinely used as fuel for the olefins furnaces. Supplemental fuel for the...

  8. asphalt plants: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    pricing. This, in turn, negatively...-product of the olefins cracking process. This off-gas is routinely used as fuel for the olefins furnaces. Supplemental fuel for the...

  9. Evaluation of Moisture Susceptibility of Warm Mix Asphalt

    E-Print Network [OSTI]

    Garcia Cucalon, Maria Lorena

    2013-05-03T23:59:59.000Z

    . To evaluate WMA moisture susceptibility during this critical period, standard laboratory tests were used for three field projects each with an HMA control mixtures and multiple WMA mixtures. Different specimen types were also evaluated to capture differences...

  10. Prediction of Reflection Cracking in Hot Mix Asphalt Overlays

    E-Print Network [OSTI]

    Tsai, Fang-Ling

    2011-02-22T23:59:59.000Z

    model ??????????? 138 3.29 Typical daily pavement temperature prediction using improved model ??????? 139 3.30 Schematic representation of heat transfer model of pavement ?????????????????? 141 3.31 Optimized albedo values in: (a) Summer and (b...

  11. asphalt cement: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    early stage hydration of different classes of oilwell cement Bentz, Dale P. 187 NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration Engineering Websites Summary: NISTIR...

  12. Asphalt landscape after all : residual suburban surface as public infrastructure

    E-Print Network [OSTI]

    O'Connor, Joseph Michael, M. Arch. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    The thesis proposes a hybridized commercial retail strip inserted into a residual suburban condition as a manner of investigating the latent potential of suburban logic, both its constituent elements and its formal rules ...

  13. Full-Depth Pavement Reclamation with Foamed Asphalt: Final Report

    E-Print Network [OSTI]

    Jones, David; Fu, P.; Harvey, John T; Halles, F.

    2008-01-01T23:59:59.000Z

    Standard Method of Test for Determining the Creep ComplianceStandard Method of Test for Determining the Creep ComplianceLTPP P07 (Test Method for Determining the Creep Compliance,

  14. asphalt combustion process: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    response Materials Science Websites Summary: were produced by a technique combining self-propagating high-temperature synthesis (SHS) of elementalC result in the formation of...

  15. asphalt concrete surfaces: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Polymer Eythor Thorhallsson M that was done on concrete cylinders confined with basalt fibre reinforced polymer (BFRP) and examination of its of more ductile behaviour. Key...

  16. asphalt wearing courses: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and Dissertations Summary: ??The mechanical properties and wear behaviour of B(SiC) fibre-reinforced metal matrix composites (MMCs) and aluminium alloy (2014) produced by...

  17. asphalt concrete road: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    polishing. Using available databases a detailed analysis of the different types of road surfaces has been performed to evaluate the relationship between the type of road surface...

  18. aged asphalt concrete: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Summary: extraction and recovery by testing of the fine aggregate matrix (FAM) using solid torsion bar fixture with the dynamic shear rheometer (DSR). The specific objective...

  19. asphalt rubber: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Version 7.0 University of California eScholarship Repository Summary: Oil refining Coking & coal products 2 Chemicals Pharmaceuticals Chemical fibers RubberOil refining...

  20. asphalt ballast: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    TxSpace Summary: comeback. Additionally, new controllable ballasts and automatic lighting controls make possible hybrid lighting systems that are able to provide optimal lighting...

  1. asphalt ridge deposit: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of the transient state of matter. S. M. Troshin; N. E. Tyurin 2013-01-09 294 Climate Change Science Institute at Oak Ridge National Laboratory Environmental Sciences and Ecology...

  2. Evaluation of moisture damage within asphalt concrete mixes 

    E-Print Network [OSTI]

    Shah, Brij D.

    2004-09-30T23:59:59.000Z

    as bond energy in order to predict moisture damage. Mixtures with the two types of bitumen and each aggregate with and without hydrated lime were evaluated. The hydrated lime substantially improved the resistance of the mixture to moisture damage....

  3. Evaluation of moisture damage within asphalt concrete mixes

    E-Print Network [OSTI]

    Shah, Brij D.

    2004-09-30T23:59:59.000Z

    with load cycles. The analysis demonstrates the need to consider mixture compliance as well as bond energy in order to predict moisture damage. Mixtures with the two types of bitumen and each aggregate with and without hydrated lime were... evaluated. The hydrated lime substantially improved the resistance of the mixture to moisture damage. iv To my parents. v ACKNOWLEDGMENTS I would like to extend my sincere thanks to everyone who helped...

  4. Energy Efficiency Opportunities in the Stone and Asphalt Industry

    E-Print Network [OSTI]

    Moray, S.; Throop, N.; Seryak, J.; Schmidt, C.; Fisher, C.; D'Antonio, M.

    2006-01-01T23:59:59.000Z

    transportation within and outside of the quarry is the most common method of stone transportation. In-plant, the largest use of diesel is from the haul trucks moving the shot-rock from the quarry to the primary crusher. Diesel fuel costs are significant and can... and consistent product gradation, cone crushers must be choke fed at all times. Portable Crushers. A typical quarry face will recede approximately 45 feet every year. This extra distance increases the work of the haul trucks that feed the primary crushers...

  5. Full-Depth Pavement Reclamation with Foamed Asphalt: Final Report

    E-Print Network [OSTI]

    Jones, David; Fu, P.; Harvey, John T; Halles, F.

    2008-01-01T23:59:59.000Z

    a comprehensive factorial design was prepared at the104 Table 7.1: Factorial Design for Phase 2 Laboratory122 Table 7.8: Revised Factorial Design for Stiffness

  6. New Cool Roof Coatings and Affordable Cool Color Asphalt

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many DevilsForum |EnergyNew Catalytic ConversionNew Cool Roof

  7. Nonlinear Dynamics of Longitudinal Ground Vehicle Traction

    E-Print Network [OSTI]

    Shaw, Steven W.

    asphalt b) Wet asphalt c) Gravel d) Packed Snow Nonlinear Dynamics of Longitudinal Ground Vehicle Traction

  8. Journal of Alloys and Compounds 449 (2008) 191195 Effects of plasma polymerized para-xylene intermediate layers

    E-Print Network [OSTI]

    Boo, Jin-Hyo

    2008-01-01T23:59:59.000Z

    terephthalate substrates Sunyoung Sohna, Kyuhyung Kima, Samil Khoa, Donggeun Junga,, Jin-hyo Boob a Department

  9. The Effect of Y-zeolite Acidity on m-Xylene Transformation Reactions S. Al-Khattaf*

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    of these aromatic hydrocarbons are the reforming and pyrolysis gasoline, which have a higher ratio of low-valued m

  10. Photonic crystal slot waveguide for high sensitivity on-chip near-infrared optical absorption spectroscopy of xylene in water

    E-Print Network [OSTI]

    Chen, Ray

    of ethanol, despite clean air-saturated water flowing continuously through the tank at a relative high Oil & Gas Pollution Control, China University of Petroleum-Beijing, 18 Fuxue Rd., Beijing 102249-occurring or pre-existing toxic aromatic hydro- carbons such as benzene, toluene, ethylbenzene and xy- lenes (BTEX

  11. A SPRAY REACTOR CONCEPT FOR CATALYTIC OXIDATION OF P-XYLENE TO PRODUCE HIGH-PURITY TEREPHTHALIC ACID

    E-Print Network [OSTI]

    LI, MENG

    2013-08-31T23:59:59.000Z

    analyzing and solving problems, about perseverance and staying positive when research hits a snag. Prof. Subramaniam has been and will always be a great mentor and an invaluable asset to me. Special thanks are also due to Prof. Daryle Busch, Prof. Raghunath...: T = 200 °C, P = 15 bar; Initial pX = 25 mM, Co = 12.5 mM, Mn = 12.5 mM, Br = 32.5 mM; O2:CO2 (mol:mol) = 1:1) ....................................42 Figure 2.9 Figure 2.9: Color changes of the reaction solution due to the formation of various cobalt...

  12. Dioxygen activation and substrate hydroxylation by the hydroxylase component of toluene/O-xylene monooxygenase from pseudomonas sporium OX1

    E-Print Network [OSTI]

    Murray, Leslie Justin

    2007-01-01T23:59:59.000Z

    Non-heme carboxylate-bridged diiron centers in the hydroxylase components of the bacterial multicomponent monooxygenases activate dioxygen at structurally homologous active sites. Catalysis requires the management of four ...

  13. Reflective Cracking Study: Second-Level Analysis Report

    E-Print Network [OSTI]

    Jones, David; Tsai, Bor-Wen; Ullidtz, Per; Wu, R.; Harvey, John T; Monismith, Carl L.

    2008-01-01T23:59:59.000Z

    in asphalt concrete overlays under HVS testing conditions,asphalt concrete was derived from laboratory testing at 20°Cthe asphalt concrete. Summary of Testing on the Underlying

  14. Reflective Cracking Study: Initial Construction, Phase 1 HVS Testing, and Overlay Construction

    E-Print Network [OSTI]

    Bejarano, Manuel O.; Jones, David; Morton, Bruce S.; Scheffy, Clark

    2008-01-01T23:59:59.000Z

    Testing on the Asphalt Concrete FWD testing was conducted onin asphalt concrete modulus after HVS testing on SectionsTesting on the Asphalt Concrete ..

  15. Reflective Cracking Study: Backcalculation of HVS Test Section Deflection Measurements

    E-Print Network [OSTI]

    Lu, Qing; Jones, David; Harvey, John T

    2008-01-01T23:59:59.000Z

    2 HVS testing generally damaged the asphalt concrete layers2 HVS testing generally damaged the asphalt concrete layers2 HVS testing generally damaged the asphalt concrete layers

  16. Contribution of Building Materials to Urban Wet-Weather Pollutant

    E-Print Network [OSTI]

    Clark, Shirley E.

    and to prevent stripping of asphalt from binders. · Fillers include carbon black from pyrolized tires. Asphalt · Khandal et al. (1995) investigated incorporation recycled asphalt pavement (RAP) into new

  17. The effects of maize dwarf mosaic virus strain B on sorghum

    E-Print Network [OSTI]

    Alexander, John David

    1983-01-01T23:59:59.000Z

    the tips of the leaves in sorghum. 16 9 Death due to extensive redleaf reaction in sorghum. 17 10 RTx7000 hypersensitive reaction to MDMV-B. 11 ATx623 x RTx430 differential symptom reactions. 12 SA394 differential symptom reactions. 13 RTx430... Source OKY8 BTx3197 ATLAS RIO BTx398 SA8735 N MEX 31 SC0097-14E BTx378 QL-11 SC0175-14E 8199 PIONEER BTx623 BEGARI RTx430 RTAM428 QL-3 TEXAS QL-3 INDIA RTx7000 RTx414 SA7078 RTx09 RTx412 SA394 PI35038 BTx3048 ATx623 x RTx430...

  18. ISAP 2012 Brosseaud et al: High modulus asphalt with high rate of recycling 1/13 High modulus asphalt mixes with high rate of RA: what does

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    and structural performances (infrared spectroscopy, Size Exclusion Chromatography, IATROSCAN, asphaltenes content

  19. Laboratory measured characteristics of hot-mix asphaltic concrete as related to field performance

    E-Print Network [OSTI]

    TenBrook, James Joseph

    1966-01-01T23:59:59.000Z

    Laboratory Army Corps of Engineers Study o THD 1';otorized Press Gyratory Testing 1'~machine ~'marshall Device California Ilachine 1G Field Test Sites Test Section Layout 12 Maco Section Layout 13 Paving A Test Section 14 Coring One Meek Samples 15... molded in their laboratories at the standard $0 blow compactive effort. These marshall specimens were used to provide density and stability data; and to provide a means of comparison between field and laboratory specimens. The significant conclusions...

  20. Evaluation of a biomass derived oil for use as additive in paving asphalt

    SciTech Connect (OSTI)

    Houde, J. Jr.; Clelland, I.; Sawatzky, H. [CANMET, Ottawa, Ontario (Canada)

    1995-12-31T23:59:59.000Z

    Treatment and disposal costs of sewage sludge can represent up to 50% of a municipality`s annual wastewater treatment budget. Sewage sludge (30% solids) accounts 5% of Canadian landfill by weight, and the ever increasing volume of sludge coupled with the decreasing options available for disposal creates a growing problem for major municipalities. Current disposal options are agricultural application, incineration and landfill. Concern about heavy metal migration and public pressure to find a local solution has severely curtailed the spreading of sludge on agricultural land. Incineration is the major option for larger centers but the relatively high cost for incineration, ranging from $350 to $1000/t dry sludge, has caused a great deal of interest in methods of improving the cost effectiveness of incineration or in new equivalent technologies. The high cost and more stringent environmental regulations for incinerating municipal sludges have led to developing more efficient sludge management technologies that are not agricultural based. This paper describes applications of oils from sludge processing.

  1. Investigation of Rheological and Nano-Rheological Properties of Asphalt Binders

    E-Print Network [OSTI]

    Kabir, Pooyan

    2014-08-04T23:59:59.000Z

    absorption. The amount of 0.2-0.3 grams of binders were spread on a 0.5×3 (cm2) area to prepare the samples. 2.2.2 Equipment The Bruker Dimension Icon AFM and the data processing unit were used to measure mechanical properties at room temperature (25 °C...

  2. Laboratory evaluation of crumb rubber asphalt concrete mixtures using the concepts of SMA mixtures

    E-Print Network [OSTI]

    Rebala, Somasekhar Reddy

    1994-01-01T23:59:59.000Z

    , = 60 psi (414 kpa)) for Control and Crumb-Rubber Mixtures. . . . . . . . . 42 44 74 TABLE 5. 2 Compressive Strain at Failure for CRM and Dense Graded Mixtures 104'F 80 TABLE 5. 3 Number of Repetitions to Failure for Control and Crumb...

  3. Compaction Effects on Uniformity, Moisture Diffusion, and Mechanical Properties of Asphalt Pavements

    E-Print Network [OSTI]

    Kassem, Emad Abdel-Rahman Ahmed

    2011-08-08T23:59:59.000Z

    in gyratory specimens were related to the mixture mechanical properties measured using the Overlay and Hamburg tests. The second part of this study focused on studying the relationship between air void distribution and moisture diffusion. A laboratory test...

  4. Evaluation of the influence of various parameters on the healing potential of an asphalt concrete mix

    E-Print Network [OSTI]

    Telikicherla, Sriram Kumar

    1992-01-01T23:59:59.000Z

    OF CONTENTS . V1 VI1 LIST OF TABLES . LIST OF FIGURES. . . . . . . . . , CHAPTER I INTRODUCTION . II LITERATURE REVIEW 1. Significance of Rest Periods . 2. Chemical Healing Mechanism III MATERIALS AND TESTING PROCEDURES 10 15 1. Materials . . 15... and Discussion of Healing Tests 29 30 54 TABLE OF CONTENTS (continued) CHAPTER VI STATISTICAL ANALYSES OF HEALING DATA . . Page 94 1. Regression Analysis 2. Multiple Comparison Tests VII CONCLUSIONS AND RECOMMENDATIONS 95 108 117 1. Conclusions 117...

  5. A Coupled Micromechanical Model of Moisture-Induced Damage in Asphalt Mixtures: Formulation and Applications

    E-Print Network [OSTI]

    Caro Spinel, Silvia

    2011-02-22T23:59:59.000Z

    the microstructure of the mixture at different intensities and rates. Although there have been important advancements in identifying and characterizing this phenomenon, there is still a lack of understanding of the damage mechanisms occurring at the microscopic level...

  6. Structural Characterization of Micromechanical Properties in Asphalt Using Atomic Force Microscopy

    E-Print Network [OSTI]

    Allen, Robert Grover

    2012-02-14T23:59:59.000Z

    -nuclear aromatics and hetero-aromatic molecules (asphaltenes), viscous naphtheno-aromatic hydrocarbons (heavy oils) and heterocyclic and polar compounds (resins). The initial relative amount and arrangement of 9 asphaltenes, resins and oils are highly... between the PDM morphology and the colloidal system where the asphaltenes are stabilized by polar aromatics in a sea of naphthene aromatics and saturated compounds. This does not necessarily invalidate the model but suggests that it is possibly too...

  7. Automated Protocol for the Analysis of Dynamic Mechanical Analyzer Date from Fine Aggregate Asphalt Mixes

    E-Print Network [OSTI]

    Cavalcanti De Sousa, Pedro

    2010-10-12T23:59:59.000Z

    of this study was to develop software to analyze the data from DMA test. Such software will enable engineers and researchers to perform the complex analysis in very short time. This is Microsoft Windows ® based software, executable in any hardware configuration...

  8. The effect of aging techniques on asphalt low-temperature properties

    E-Print Network [OSTI]

    Knorr, Daniel Brainard

    2001-01-01T23:59:59.000Z

    . . . . . . . . . 62 m-Value as a Function of Aging Time for AAF-I Stiffness as a Function of Aging Time for AAF-I . . . . 63 . . . . 63 xu FIGURE III-22 H1-23 m-Value as a Function of Aging Time for Exxon AC-20 . . . . . Stiffness as a Function of Aging Time... for Exxon AC-20 . . . . . Page . . . . 64 Comparison of m-Value Grade and S Grade for Materials at Various Aging Times. . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 III-25 Comparison of m...

  9. The effect of air blowing on the properties of rubber-modified asphalt binder

    E-Print Network [OSTI]

    Bauer, Shauna Erin

    1997-01-01T23:59:59.000Z

    . . . . . . . . H-2 The LSI and HSD mixing blades. . 19 21 H-3 Schematic of the Superpave? procedure. 28 HI-1 Complex viscosity data for Exxon AC-10 blends (10% TG-10WT) with varying A/N ratios . 32 HI-2 Carbonyl areas of Exxon AC-10 blends (10% TG-10WT...) with varying A/N ratios. 32 IH-3 Complex viscosity data for Exxon AC-10 blends (10% RS-80) with varying A/N ratios . . 35 HI-4 Carbonyl areas of Exxon AC-10 blends (10% RS-80) with varying A/N ratios. 35 HI-5 Complex viscosity data for Fina Demex Resin...

  10. Impact of aging on asphalt pavement performance, ductility and DSR measurements

    E-Print Network [OSTI]

    Al-Azri, Nasser Ahmed

    2002-01-01T23:59:59.000Z

    . . . . . . . . . . . . 39 111-6 The Eslimated Ductility Values of Texas, SH 21 Cores. . . . . . 41 111-7 Field and Lab-aged Exxon AC-20 Hardening Rate. . . . . . . . 43 LIST OF FIGURES FIGURE Page G' versus tI'/G' at (15 'C and 0. 005 rad/s) (Ruan, 2002). . . , 12... Susceptibility of Exxon AC-20 Obtained for Lab- and Field-Aged Binder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 The G' Versus tI*/G' of Lab- and Field-Aged Fxxon AC-20...

  11. The effects of lime and amines on the aging of asphalts and recycling agents

    E-Print Network [OSTI]

    Wisneski, Mary Luvola

    1995-01-01T23:59:59.000Z

    amounts of quick lime (CaO) and hydrated lime (Ca(OH),) on SHRP AAA-I and SHRP AAF-1. The second experiment was to determine the effects of three different amines and various amounts of CaO on aged SHRP AAA-I and SHRP AAF-I rejuvenated with ABM-F2, YBF-F2...

  12. Application of surface energy measurements to evaluate moisture susceptibility of asphalt and aggregates

    E-Print Network [OSTI]

    Zollinger, Corey James

    2005-08-29T23:59:59.000Z

    Conditions 64 17 DMA Linear Viscoelastic Phase Angle in Both Dry and Wet Conditions ......... 64 18 Mixture Rankings according to Average Fatigue Life in Both Dry and Wet Conditions.........................................................................................66 19 Mixture Rankings according to Reduction in Dynamic Modulus (G*/Go) at Fatigue Life in Both Dry and Wet Conditions.................................. 68 20 Average E1 and m Values...

  13. Analytical-Numerical Methodology to Measure Undamaged, Fracture and Healing Properties of Asphalt Mixtures

    E-Print Network [OSTI]

    Koohi, Yasser 1980-

    2012-08-29T23:59:59.000Z

    ....................................................................................................... 66? Methodology .................................................................................................... 67? Finite Element Duplication of the Test ........................................................ 68? Development of the Crack... the Crack .................................................................. 117? Results for the Fracture and Healing Properties ......................................... 118? Concluding Remarks...

  14. Laboratory evaluation of selected fabrics for reinforcement of asphaltic concrete overlays

    E-Print Network [OSTI]

    Pickett, David L

    1981-01-01T23:59:59.000Z

    Toughness, G Analysis of Crack Growth Coefficients, a and b Analysis of Tensile Work Coefficients, c and d Analysis of Peak Load Versus Cycle Number Data Finite Element Analysis Fracture Mechanics Applications Summary . CHAPTER VII. CONCLUSIONS... an overlay test Log C versus Log N for Sample 110 Log E versus Log N for Sample 110 Log C versus Log N for Sample 101 Log E versus Log N for Sample 101 Ratio of stress intensity factor to peak load versus relative crack l. ength (43) Fracture mechanics...

  15. Development of a long-term durability specification for polymer modified asphalt

    E-Print Network [OSTI]

    Woo, Won Jun

    2009-06-02T23:59:59.000Z

    through MnRoad)............................................................................................... 42 Figure II-18. ?* Hardening Rate for ER Aged Binders (Lion through Valero)........ 42 Figure II-19. GPC Chromatograms for Koch PG 64...-22............................................ 44 Figure II-20. GPC Chromatograms for Koch PG 70-22............................................ 44 Figure II-21. GPC Chromatograms for Koch PG 76-22............................................ 45 Figure II-22. GPC Chromatograms for Mn...

  16. The effect of asphalt deposition on permeability in miscible flooding with liquified petroleum gas (LPG

    E-Print Network [OSTI]

    Pinson, Arthur Edward, Jr

    1962-01-01T23:59:59.000Z

    'teen milliliters of oil was mixed thoroughly with 85 milliliters of petroleum ether and centrifuged at 1750 rpm for 450 seconds. The results of the precipitation tests are shown in Table III. The petroleum ether used was 67. )fo N-Pentane and. $2. 7%%d Di.... 48 0. 114 21 ' 8 24. 7 36 ' 6 41. 4 39. 0 37. 7 37-3 ?Hawkins and Talco at 80'F, others at 74 F TABLE III PRECIPITATION BEHAVIOR OP OILS MIXED WITH PETROLEUM ETHER OILS Denton 75%%d Denton/25% "Heavy" 50% Denton/50%%d "Heavy" 25...

  17. Laboratory Evaluation of Hot-Mix Asphalt Concrete Fatigue Cracking Resistance

    E-Print Network [OSTI]

    Jamison, Brandon Parker

    2012-02-14T23:59:59.000Z

    that the crack initiates in the center of the specimen, including Walubita et al. (5), Mohammad et al. (10), and Mull et al. (21). Notch depths vary depending on many factors such as specimen thickness, diameter, loading rate, test temperature, and mix type...

  18. Study of the asphalt pavement damage through nondestructive testing on overweight truck routes

    E-Print Network [OSTI]

    Ramos-Aparicio, Sonia Ines

    2004-09-30T23:59:59.000Z

    -in-motion (WIM) data for fiscal year 2003 and Rhonda Christensen and Betty Hohensee who provided the lane distribution data at the WIM site along SH 4/48. I would like to express my gratitude to Gerry Harrison and Lee Gustavus, research technicians.... It was not possible to see the ground water table from the GPR data collected with the 200 MHz antenna. Researchers note that Pharr District personnel drilled a hole on the shoulder near the location of a weigh-in-motion (WIM) site along SH48. No water table...

  19. The development of a computerized analysis for asphaltic-concrete-mechanical-characterization data

    E-Print Network [OSTI]

    Fleisher, Harvey Oscar

    1972-01-01T23:59:59.000Z

    method consists of dividing the specimen dry weight in air by the measured dimensional volume of the specimen. The equation for this is G = W /(2. 54) (V) (5) where G = average bulk specific gravity based upon specimen m lineal dimensions, W... the bulk specific gravities found from Eqs (5) and (6). Thus, V = 100I 1 ? (G /G )] vm m t where V vm G t percentage of air voids of average bulk volume based upon specimen lineal dimensions, and maximum theoretical specific gravity based upon...

  20. Whole House Thermal Performance of Asphalt Shingles Exploiting Special Infrared Reflective Pigments 

    E-Print Network [OSTI]

    Hahn, L.; Miller, W.; Desjarlais, A.; Jacobs, J.; Youngquist, A.

    2006-01-01T23:59:59.000Z

    are formulated with certain cool color pigments that are highly reflective in the near-infrared (NIR) portion of the solar spectrum. Brady and Wake (1992) found that 10-µm particles of TiO 2, when combined with colorants such as red and yellow iron oxides...-04 using cycle 4 as described in Table X2.1, Common Exposure Conditions, of the G 154 standard (ASTM 2002b). A UVB-340 lamp was used for simulating direct solar UV radiation; this lamp has no UV output below 300 nm, which is the cutoff wavelength...

  1. Characterization of aggregate resistance to degradation in stone matrix asphalt mixtures

    E-Print Network [OSTI]

    Gatchalian, Dennis

    2006-04-12T23:59:59.000Z

    breakdown, as can be seen on Figure 2.1 through comparing the gradation after compaction with that before compaction. Figure 2.1: Influence of Compaction on Change in Gradation (after Xie and Watson 2004). 14 The L.A. abrasion value and F... on Aggregate Breakdown (after Xie and Watson 2004). LA Abrasion value, % 15 Figure 2.3: Influence of F&E Content on Aggregate Breakdown (after Xie and Watson 2004). Methods for Characterization of Aggregates for SMA Mixtures An important...

  2. An evaluation of permanent deformation properties of crumb rubber modified (CRM) asphalt concrete mixtures

    E-Print Network [OSTI]

    Makunike, Danai Ellarin

    1995-01-01T23:59:59.000Z

    applications, while the remainder is dumped in stockpiles as scrap. Tire stockpiles pose an environmental threat as fire and health hazards. As a result, government agencies have taken action to mandate the recycling of waste tire rubber by state transportation...

  3. Water Quality and Hydrologic Performance of a Porous Asphalt Pavement as a Storm-Water

    E-Print Network [OSTI]

    examined the functionality of a porous pavement storm-water management system in coastal New Hampshire headings: Stormwater management; Runoff; Porous media; Pavements; Cold regions; Best Management Practice; Water quality; Water treatment. Author keywords: Storm-water management; Runoff; Porous pavements; Cold

  4. The contribution of asphalt road surfaces to fire risk in tunnel fires: Preliminary findings 

    E-Print Network [OSTI]

    Carvel, Ricky O; Torero, Jose L

    2006-04-19T23:59:59.000Z

    Most fire experiments carried out in tunnels to date have focussed on the burning behaviour and smoke production of liquid pool fires and vehicle fires. Other combustible surfaces, commonly found in tunnels, have not ...

  5. Studies of asphalt air blowing and development of a new short-term aging technique 

    E-Print Network [OSTI]

    Vassiliev, Nicolai

    2001-01-01T23:59:59.000Z

    lower temperature variation in the oil bath and better film agitation in the flask. At 163 'C (325 'F) for a sample weight of 200 g it takes 160 minutes to achieve the aging effect closest to that of the TFOT and 210 minutes to compare... on the operating temperature and was less at higher temperatures. A total of 300 g of heated material was placed in a 1 qt (07946 Ll can and air-blown with constant agitation by a mixer attached to a motor at 1550 RPM. An insulated heating tape was used to heat...

  6. The application of triaxial compression tests to the design of sand-asphalt paving mixtures 

    E-Print Network [OSTI]

    Ritter, Leo J

    1940-01-01T23:59:59.000Z

    of Changes in Sand. Orading upon the JLngle of Internal Friction III. Effect of the Initial Void Ratio upon ths ' ingle of Internal friction (Pine Sand. ) . . . . . . . Page 31 35 IV. Xffect oi Dust on the Angle of Internal Jriction in Sand Nixes... after Failure . . , 24 S. Nffsct of Changes in Sand. Grading on the Angle of Internal Friction . . . . . . '. . . . . . . . . . . . . . . . . 32 Relation between ths Angle of Internal Friction ank Initial Yolk Ratio (Fine Sank...

  7. Did you pave the road to project completion with gold, asphalt, or mud?

    SciTech Connect (OSTI)

    Wilberg, M.; Simpson, W.

    1994-12-31T23:59:59.000Z

    The Simpson-Wilberg Technique for Expert Decision Tree Modeling (patent case number S-83,506) establishes and identifies the proper requirements governing effective business and operating practices through the use of knowledge-based engineering (KBE). The new application, Project Control Expert System (ProCon X) was created by the Simpson-Wilberg technique as a tool for project definition planning and control. ProCon X guides the project manager through an interview session asking project characteristic questions and establishes the proper project criteria. The criteria produced define the rigor applied to the project activities, i.e., level of work breakdown structure (WBS), type of scheduling, amount of cost estimating, etc. In this paper the use of the Simpson-Wilberg technique will be illustrated for solving the problems of identifying proper project criteria for project management. This technique has been used for other applications outside the project management field and can be used in any field with a need for consistent application of rules and procedures routinely used for business and operating practices.

  8. asphalt-rubber rotational viscosity: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at birth. A fraction of the gravitational binding energy of collapse is stored in the free energy of differential rotation. This energy source may be tapped by viscous...

  9. An evaluation of permanent deformation properties of crumb rubber modified (CRM) asphalt concrete mixtures 

    E-Print Network [OSTI]

    Makunike, Danai Ellarin

    1995-01-01T23:59:59.000Z

    that are associated with permanent deformation. These include Hveem stability, air voids, permeability, creep response, and compressive strength. Three CRMAC mixtures were used, each containing different amounts of RAP. The study aimed at defining how these properties...

  10. The effect of construction variables on the dynamic modulus of asphalt treated base courses 

    E-Print Network [OSTI]

    Moeller, William Ernest

    1970-01-01T23:59:59.000Z

    were taken the confining pressure was raised to 20 psi and the procedure repeated. The same sequence was repeated for a confining prossnre of 40 psi. 37 Unconfined Comcression Test The unconfined compression test has long been used in the testing... the recorder load versus time plot. No other instrumentation was utilized in this test. The Texas High?ay Department procedure for unconfined compression testing of bituminous mixtures specifies a specimen temperature of 140 F and a rate of loading...

  11. Analysis of aggregate imaging system (AIMS) measurements and their relationship to asphalt pavement skid resistance

    E-Print Network [OSTI]

    Luce, Anthony David

    2009-05-15T23:59:59.000Z

    ................................................................................. 5 Overview ................................................................................................. 5 Pavement Skid Resistance........................................................................ 5 Pavement Texture Components of Skid... of AIMS Units Using Average Texture Levels 4 and 5 ....................................................................................... 55 Sphericity Comparison ............................................................... 57 Comparison...

  12. The application of triaxial compression tests to the design of sand-asphalt paving mixtures

    E-Print Network [OSTI]

    Ritter, Leo J

    1940-01-01T23:59:59.000Z

    ~ort Mk e) 31 ff 1 Straia es Stress o Corrected Area . Corrected irea; ~(1 S orp-PS Al iy I ~ ' ~ ~ . ~ I:I: I ' ~, 'I:I I, ~ I . . I Sik ~~~RIJ%~ %XKmIml~~~ ~~ ~~~~KHWRRK45GRR~~ ~~RW2%%~RR%H~% ~~~~~~~RER~~~~ BK~~~RKWRRXB~ ~~~S...

  13. The Effects of Using Alkali-Silica Reaction Affected Recycled Concrete Aggregate in Hot Mix Asphalt 

    E-Print Network [OSTI]

    Geiger, Brian James

    2011-10-21T23:59:59.000Z

    occurring in reactive aggregates within the HMA or re-expansion of existing gel. The Lottman test and micro-calorimeter were used to determine the moisture susceptibility of HMA made with ASR-RCA. A differential scanning calorimeter (DSC...

  14. New Cool Roof Coatings and Affordable Cool Color Asphalt | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOilNEW HAMPSHIRE BUILDSEnergy|NaturalSystemCommercial

  15. An investigation of factors that significantly affect pavement maintenance costs in Texas

    E-Print Network [OSTI]

    Fogle, Kendall Lee

    1998-01-01T23:59:59.000Z

    in the state of Texas; four were developed for two-lane U.S. highways (asphalt, concrete, resurfaced, and thin asphalt pavements) and three were developed for interstate highways (asphalt, concrete, and resurfaced pavements). Many factors were considered...

  16. The Phase One I-710 Freeway Rehabilitation Project: Initial Design (1999) to Performance after Five-Plus Years of Traffic (2009)

    E-Print Network [OSTI]

    Monismith, Carl L.; Harvey, John T; Tsai, Bor-Wen; Long, Fenella; Signore, J.

    2009-01-01T23:59:59.000Z

    Open-graded Porous Friction Asphalt Concrete (PBA-6a*)additional asphalt concrete and the porous friction course.concrete with asphalt rubber binder (RAC-O). The thickness including the open-graded porous

  17. aquifer idaho national: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and educators from all Idaho state universities; staff 30 Idaho Asphalt Conference October 24, 25, 2012 Attendee List Engineering Websites Summary: 52nd Idaho Asphalt...

  18. Collecting Construction Equipment Activity Data from Caltrans Project Records

    E-Print Network [OSTI]

    Kable, Justin M

    2008-01-01T23:59:59.000Z

    existing pavement into a haul truck. Asphalt pavers are usedlay asphalt, on-road diesel trucks haul soil around the job

  19. Atmos. Chem. Phys., 13, 87978811, 2013 www.atmos-chem-phys.net/13/8797/2013/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    , acrolein, benzene, toluene and xylenes are also emitted. Positive matrix factorization (PMF) was applied

  20. ForReview.Confidential-ACS Catalytic Transformation of 1,3,5 -Trimethyl Benzene over USY Zeolite

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    and trimethylbenzenes (TMB) coming from the reforming and pyrolysis of gasoline, into benzene and xylenes via

  1. Thermochemical conversion of waste materials to valuable products

    SciTech Connect (OSTI)

    Saraf, S. [Engineering Technologies, Lombard, IL (United States)

    1997-12-31T23:59:59.000Z

    The potential offered by a large variety of solid and liquid wastes for generating value added products is widely recognized. Extensive research and development has focused on developing technologies to recover energy and valuable products from waste materials. These treatment technologies include use of waste materials for direct combustion, upgrading the waste materials into useful fuel such as fuel gas or fuel oil, and conversion of waste materials into higher value products for the chemical industry. Thermal treatment in aerobic (with oxygen) conditions or direct combustion of waste materials in most cases results in generating air pollution and thereby requiring installation of expensive control devices. Thermochemical conversion in aerobic (without oxygen) conditions, referred to as thermal decomposition (destructive distillation) results in formation of usable liquid, solid, and gaseous products. Thermochemical conversion includes gasification, liquefaction, and thermal decomposition (pyrolysis). Each thermochemical conversion process yields a different range of products and this paper will discuss thermal decomposition in detail. This paper will also present results of a case study for recovering value added products, in the form of a liquid, solid, and gas, from thermal decomposition of waste oil and scrap tires. The product has a high concentration of benzene, xylene, and toluene. The solid product has significant amounts of carbon black and can be used as an asphalt modifier for road construction. The gas product is primarily composed of methane and is used for heating the reactor.

  2. A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration 

    E-Print Network [OSTI]

    Ravindran, Parag

    2009-06-02T23:59:59.000Z

    . In proportion to the quantity of its usage and in acknowledgment of modeling complexity, the material has been interrogated by many researchers using a variety of mechanical tests, and a plethora of linear viscoelastic models have been developed. Most models...

  3. INTRODUCTION Asphalt is a mixture of a wide variety of chemical compounds that include aliphatic hydrocarbons and highly fused

    E-Print Network [OSTI]

    Harms, Kyle E.

    hydrocarbons and highly fused aromatic ring systems.They are classified as asphaltenes (medium molecular weight

  4. A comparison of the fracture properties of conventional and polymer-modified two-layer asphalt concrete overlay systems

    E-Print Network [OSTI]

    Reddy, Praveena Gutha

    1996-01-01T23:59:59.000Z

    -4a. Crack Length vs. Load Cycle for Sample 2C A-4b. Energy Dissipated vs. Load Cycle for Sample 2C . . . 71 71 72 72 73 73 A-5a. Crack Length vs. Load Cycle for Sample 3C A-5b. Energy Dissipated vs. Load Cycle for Sample 3C 74 74 A-6a... for Sample 4C . . . . . . . . . . A-8b. Energy Dissipated vs. Load Cycle for Sample 4C 76 77 77 A-9a. Crack Length vs. Load Cycle for Sample 5B 78 A-9b. Energy Dissipated vs. Load Cycle for Sample 5B . ? Page A-10a. Crack Length vs. Load Cycle...

  5. Application of Direct Tension Testing to Laboratory Samples to Investigate the Effects of Hot Mix Asphalt Aging

    E-Print Network [OSTI]

    Padigala, Meghana 1989-

    2012-12-07T23:59:59.000Z

    to design mixtures taking this phenomenon into account and achieving maximum durability is an important and complex issue. This study was aimed at characterizing the effects of oxidative aging on durability in terms of mixture fatigue resistance...

  6. A study of sand-asphalt mixtures: a constitutive model based on a thermomechanical framework and experimental corroboration

    E-Print Network [OSTI]

    Ravindran, Parag

    2009-06-02T23:59:59.000Z

    TABLE OF CONTENTS CHAPTER Page I INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1 B. Focus of Research . . . . . . . . . . . . . . . . . . . . . . . 2 C. Outline... of Dissertation . . . . . . . . . . . . . . . . . . . . 4 II CONTINUUM PRELIMINARIES . . . . . . . . . . . . . . . . . 6 A. Notation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 B. Kinematics . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 C...

  7. Full-Depth Pavement Reclamation with Foamed Asphalt: First-Level Analysis Report on HVS Testing on State Route 89

    E-Print Network [OSTI]

    Theyse, Hecter; Long, Fenella; Jones, David; Harvey, John T

    2006-01-01T23:59:59.000Z

    University of California Pavement Research Center. UCPRC-RR-forms part of Partnered Pavement Research Center Strategicthe experiment layout, pavement design, test duration,

  8. 1 INTRODUCTION Flexural fatigue is one of the main failure modes in asphalt mixtures and flexible pavement

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    pavement structures. This means good prediction of a pavement's fatigue life will help to develop and im- prove pavement design procedures. Fatigue resistance and stiffness are two required parameters for pavement design necessary to dimension the pavement structure (layer thickness). European standards (EN

  9. Geocell-Reinforced Unpaved and Paved Roads with Recycled Asphalt Pavement (RAP) Bases: Experimental Study and Damage Model Development

    E-Print Network [OSTI]

    Thakur, Jitendra Kumar

    2013-08-31T23:59:59.000Z

    by increasing the percentage of resilient deformation and reducing the permanent deformations and the vertical stresses transferred to the subgrade. A thin (about 50 mm) HMA surface significantly improved the performance of RAP bases. The thicker geocell...

  10. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    by adding Synthetic Wax C. Petita , A. Milliena , F. Canestrarib , V. Pannunziob , A. Virgilib a Université.petit@unilim.fr , Phone : +33555934519 Abstract Synthetic waxes produced by standard and registered processes may be used. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax

  11. A Model for the Nonlinear Mechanical Behavior of Asphalt Binders and its Application in Prediction of Rutting Susceptibility

    E-Print Network [OSTI]

    Srinivasa Parthasarathy, Atul

    2013-04-30T23:59:59.000Z

    . Wekumbura et al. /Materials and Structures 38 (2005) 755-760 288 A 13. v ? =" 11)0 58 I 0 . ~ r 9 0 .~ s 4 , , , ,~ :~ o.~" "*%~ . . . . . . 2s 4 I 0.01 1 t Is\\] 100 10000 Fig. 3 - Stress growth coefficient. 4% EVA-PMA, T=60~ y = 0.01s 4.... The magnitude of the stress growth coefficient is many times higher in the SBS-PMA than in the EVA-PMA. Typical overshoots are observed in both PMAs. At the highest shear ate (5s4), the EVA-PMA exhibits a small undershoot before reaching the asymptotic value...

  12. Probabilistic analysis of air void structure and its relationship to permeability and moisture damage of hot mix asphalt

    E-Print Network [OSTI]

    Castelblanco Torres, Adhara

    2006-04-12T23:59:59.000Z

    of the studies primarily focused on relating permeability to the average percent air voids in the mix. Such relationships cannot predict permeability accurately due to the different distributions of air void structures at a given average percent of air voids...

  13. Contributions to an Improved Oxygen and Thermal Transport Model and Development of Fatigue Analysis Software for Asphalt Pavements

    E-Print Network [OSTI]

    Jin, Xin

    2012-02-14T23:59:59.000Z

    Page 3-1 Schematic heat transfer model of pavement .............................................. 49 3-2 Comparison of sinusoidal model calculation with measured air temperature profile... are unavailable, data can be predicted using models. Several models for this purpose had been presented in literature ( 10~13). One method ( 10) uses a heat transfer model with a surface periodic temperature boundary condition assuming that daily and annual...

  14. The distribution of estuarine benthic invertebrates in the vicinity of a natural asphalt oil seep in Luguna de Tamiahua, Mexico

    E-Print Network [OSTI]

    Yuill, Richard Matthew

    1973-01-01T23:59:59.000Z

    of Transect D 87 Diversities, Maximum Diversities, and Equitabilities for the. Stations of Transect E 88 ix LIST OF FIGURES Figure Title Page A. Laguna de Tamiahua. B. Study area with approximate location of transects The mud-flat and tar seep during... 12 Salicor&cia B~ielovii on s dry mud-flat near th shore& April, 1972 70 13 ~Sartlna ~sartinae along an intermf t'tent run- of f "stream, " Octob" r, 1972 70 14 Sectional mean number of individuals per station for ~G1~ clnde sp. 76 15 Sectional...

  15. Journal of Testing and Evaluation, Nov. 2005, Vol. 33, No. 6 Paper ID JTE12579

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    -Edge Notched Beam Test for Asphalt Concrete Mixtures ABSTRACT: This paper describes the development of a fracture test for determining the fracture energy of asphalt concrete. The test will be used in combination to be within a range typical for asphalt concrete fracture testing. KEYWORDS: asphalt concrete, fracture

  16. CRACK SPACING IN STRAINED FILMS B.B. Guzina1

    E-Print Network [OSTI]

    Guzina, Bojan

    , similar transverse cracking patterns are a feature of asphalt concrete pavements systems in cold climates

  17. 2 0 0 9 B i a n n u a l R e p o R t university of new Hampshire

    E-Print Network [OSTI]

    Porous Asphalt 16 Pervious Concrete 18 Subsurface Gravel Wetland 20 Bioretention Systems 22 Tree Box

  18. Development of a Hydrogasification Process for Co-Production of Substitute Natural Gas (SNG) and Electric Power from Western Coals

    SciTech Connect (OSTI)

    Sun, Xiaolei; Rink, Nancy

    2011-04-30T23:59:59.000Z

    This report presents the results of the research and development conducted on an Advanced Hydrogasification Process (AHP) conceived and developed by Arizona Public Service Company (APS) under U.S. Department of Energy (DOE) contract: DE-FC26-06NT42759 for Substitute Natural Gas (SNG) production from western coal. A double-wall (i.e., a hydrogasification contained within a pressure shell) down-flow hydrogasification reactor was designed, engineered, constructed, commissioned and operated by APS, Phoenix, AZ. The reactor is ASME-certified under Section VIII with a rating of 1150 pounds per square inch gage (psig) maximum allowable working pressure at 1950 degrees Fahrenheit ({degrees}F). The reaction zone had a 1.75 inch inner diameter and 13 feet length. The initial testing of a sub-bituminous coal demonstrated ~ 50% carbon conversion and ~10% methane yield in the product gas under 1625{degrees}F, 1000 psig pressure, with a 11 seconds (s) residence time, and 0.4 hydrogen-to-coal mass ratio. Liquid by-products mainly contained Benzene, Toluene, Xylene (BTX) and tar. Char collected from the bottom of the reactor had 9000-British thermal units per pound (Btu/lb) heating value. A three-dimensional (3D) computational fluid dynamic model simulation of the hydrodynamics around the reactor head was utilized to design the nozzles for injecting the hydrogen into the gasifier to optimize gas-solid mixing to achieve improved carbon conversion. The report also presents the evaluation of using algae for carbon dioxide (CO{sub 2}) management and biofuel production. Nannochloropsis, Selenastrum and Scenedesmus were determined to be the best algae strains for the project purpose and were studied in an outdoor system which included a 6-meter (6M) radius cultivator with a total surface area of 113 square meters (m{sup 2}) and a total culture volume between 10,000 to 15,000 liters (L); a CO{sub 2} on-demand feeding system; an on-line data collection system for temperature, pH, Photosynthetically Activate Radiation (PAR) and dissolved oxygen (DO); and a ~2 gallons per minute (gpm) algae culture dewatering system. Among the three algae strains, Scenedesmus showed the most tolerance to temperature and irradiance conditions in Phoenix and the best self-settling characteristics. Experimental findings and operational strategies determined through these tests guided the operation of the algae cultivation system for the scale-up study. Effect of power plant flue gas, especially heavy metals, on algae growth and biomass adsorption were evaluated as well.

  19. Phytoremediation of hydrocarbon-contaminated soils: principles and applications

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    Toluene Ethylbenzene CH2CH3 ii) Common Oxygenates MTBE O C CH3CH3 CH3 m-Xylene CH3 CH3 p-Xylene CH3 CH3 CH Ethylbenzene CH2CH3CH2CH3CH2CH3 ii) Common Oxygenates MTBE O C CH3CH3 CH3 m-Xylene CH3 CH3 CH3 CH3 p-Xylene CH3 Ethylbenzene CH2CH3 ii) Common Oxygenates MTBE O C CH3CH3 CH3 m-Xylene CH3 CH3 p-Xylene CH3 CH3 CH3CH2OH

  20. Plasma desorption mass spectrometry of organics at low temperatures

    E-Print Network [OSTI]

    Shirey, Eldon Lynn

    1993-01-01T23:59:59.000Z

    , cyclohexane, cyclohexene, 1,3-cyclohexadiene, benzene, toluene, ortho- xylene, meta-xylene, and para-xylene. PDMS is best carried out on solids; accordingly, the samples were frozen. The experiments were run using a time-of-flight mass spectrometer with a 252...

  1. Reflective Cracking Study: First-level Report on HVS Testing on Section 586RF - 45 mm MB15-GOverlay

    E-Print Network [OSTI]

    Jones, David; Wu, R; Harvey, John T

    2008-01-01T23:59:59.000Z

    of the asphalt concrete layer. Testing was stopped when thetesting being performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the results of the fifth HVS reflective cracking testing

  2. Reflective Cracking Study: First-Level Report on HVS Testing on Section 589RF - 45 mm MB4-G Overlay

    E-Print Network [OSTI]

    Jones, David; Harvey, John T; Wu, R; Lea, J.

    2008-01-01T23:59:59.000Z

    of the asphalt concrete layer. Testing was stopped when thetesting being performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the results of the second HVS reflective cracking testing

  3. Reflective Cracking Study: HVS Test Section Forensic Investigation

    E-Print Network [OSTI]

    Jones, David; Steven, B.; Harvey, John T

    2008-01-01T23:59:59.000Z

    the asphalt concrete. Summary of Testing on the Underlyingtesting performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the forensic investigation of the HVS rutting and reflective cracking testing

  4. Reflective Cracking Study: First-level Report on HVS Testing on Section 591RF - 45 mm MAC15TR-GOverlay

    E-Print Network [OSTI]

    Jones, David; Wu, R.; Harvey, John T

    2008-01-01T23:59:59.000Z

    of the asphalt concrete layer. Testing was stopped when thetesting being performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the results of the sixth HVS reflective cracking testing

  5. DEVELOPMENT OF A RAPID TEST TO DETERMINE MOISTURE SENSTIVITY OF HMA (SUPERPAVE) MIXTURES

    E-Print Network [OSTI]

    Shiwakoti, Harihar

    2007-12-14T23:59:59.000Z

    Exiting test methods to determine moisture sensitivity in hot mix asphalt are time consuming and inconsistent. This research focused on wheel tracking devices to develop a rapid test method to evaluate moisture sensitivity. The Asphalt Pavement...

  6. Terrain Trafficability Characterization with a Mobile Robot

    E-Print Network [OSTI]

    Borenstein, Johann

    for a turn is lower when driving over sand or wet grass than when driving on packed dirt or asphalt tests we collected data on a variety of different terrains, such as gravel, sand, asphalt, grass

  7. I n q u I r y, D I s c o v e r y I n e n g I n e e r I n g a n D s c I e n c e c o l l e g e o f e n g I n e e r I n g a n D s c I e n c e fa l l 2 0 0 9

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    , design and test the use of recycled scrap tires in rubberized asphalt and other civil infrastructure applications. Rubberized asphalt that uses scrap tires is cost effective and has a long-term life cycle

  8. Bitumen composition

    SciTech Connect (OSTI)

    Halasz, A.; Spinell, G.; Doolittle, D.H.

    1989-11-07T23:59:59.000Z

    This patent describes a bitumen composition. It comprises: asphalt and from about 1 wt.% to about 10 wt.%, based on asphalt, of an {alpha} -olefin polymer having a molecular weight within the range from about 750 to 5000.

  9. www.ext.vt.edu Produced by Communications and Marketing, College of Agriculture and Life Sciences, Virginia Polytechnic Institute and State University, 2013

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    created during mixing. PPs include pervious concrete, porous asphalt, and inter- locking concrete pavers) is a modified form of asphalt or concrete with a top layer that is pervious to water due to voids intentionally

  10. Taking LID to the Streets: A Case Study of Stormwater Management on Leland Avenue in San Francisco, California

    E-Print Network [OSTI]

    Thong, Michelle

    2011-01-01T23:59:59.000Z

    with a variety of materials, including porous concrete,porous asphalt and concrete block pavers. For systems that

  11. Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands

    E-Print Network [OSTI]

    Akbari, Hashem

    2008-01-01T23:59:59.000Z

    porous pavement is formed of asphalt or cement concrete (Brown, 1996) or which is loosely packed so that water

  12. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    2010. Biodegradation of MTBE by Achromobacter xylosoxidansaromatic hydrocarbons and MTBE (Eixarch and Constanti, 2010,

  13. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    by a high content of asphaltenes, composed mainly ofenrichment of resins and asphaltenes during the subsequent

  14. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    the petroleum in conventional oil reserves and interest inpetroleum in conventional oil reserves (Head et al. , 2003).in conventional oil reserves and the use of petroleum-

  15. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    and characterization of long-chain-alkane degrading Bacillus thermoleovorans from deep subterranean petroleum reservoirs.characterization of microbial assemblages associated with high- temperature petroleum reservoirs.

  16. Establishment of a laboratory mix-design method for open-graded friction courses using sulfur-extended asphalt (SEA) binders

    E-Print Network [OSTI]

    Ho, Kee-Kwong

    1981-01-01T23:59:59.000Z

    ) Nard, Arable. reristance ta ab stion snd st Ipp(m. sharp angular an4 polish slats t Nlnlwwa 755 c shed. Slntee stone o cr shed gra el 1th 905 by weight havtng at le4st olla fr4ct red fa San? as Califot'Ria speciflcatloas. Crushed gravel, slag...

  17. The importance of the glass transition temperature in relation to the low-temperature fracture resistance of asphalt and sulphlex pavement binders

    E-Print Network [OSTI]

    Smith, Douglas Lee

    1985-01-01T23:59:59.000Z

    excessive expansion of these parts would distort test results. The tubes and plungers were made of vitreous silica, often called fused quartz or quartz glass because the clear vitreous silica is made by melting large crystals of quartz (35). This material... of the desired material is compared to a reference material to determine if a thermal transition such as melting, boiling, dehydration, or crystallization takes place. Second order transitions such as the glass transition may also be determined based...

  18. An NMR (nuclear magnetic resonance) investigation of the chemical association and molecular dynamics in asphalt ridge tar sand ore and bitumen

    SciTech Connect (OSTI)

    Netzel, D.A.; Coover, P.T.

    1987-09-01T23:59:59.000Z

    Preliminary studies on tar sand bitumen given in this report have shown that the reassociation of tar sand bitumen to its original molecular configuration after thermal stressing is a first-order process requiring nearly a week to establish equilibrium. Studies were also conducted on the dissolution of tar sand bitumen in solvents of varying polarity. At a high-weight fraction of solute to solvent the apparent molecular weight of the bitumen molecules was greater than that of the original bitumen when dissolved in chloroform-d/sub 1/ and benzene-d/sub 6/. This increase in the apparent molecular weight may be due to micellar formation or a weak solute-solvent molecular complex. Upon further dilution with any of the solvents studied, the apparent molecular weight of the tar sand bitumen decreased because of reduced van der Waals forces of interaction and/or hydrogen bonding. To define the exact nature of the interactions, it will be necessary to have viscosity measurements of the solutions. 30 refs., 3 figs., 3 tabs.

  19. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    1994. EFFECTIVENESS OF BIOREMEDIATION FOR THE EXXON-VALDEZBiotechnology and bioremediation: successes and limitations.microbial diversity for bioremediation and environmental

  20. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    and microbial enhanced oil recovery for extracting andand microbial enhanced oil recovery for extracting andand microbial enhanced oil recovery for extracting and

  1. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    F. 1999. Biological decontamination of oil spills in coldmost significant means of decontamination as the ability offor environmental decontamination has been growing, and has

  2. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    underground storage tanks in the US have leaked gasoline andunderground storage tanks in the US have leaked gasoline and

  3. Application of Metagenomics for Identification of Novel Petroleum Hydrocarbon Degrading Enzymes in Natural Asphalts from the Rancho La Brea Tar Pits

    E-Print Network [OSTI]

    Baquiran, Jean-Paul Mendoza

    2010-01-01T23:59:59.000Z

    gas, liquid crude oil, shale oil, tars and bitumen (Scragg,gas, liquid crude oil, shale oil, tars and bitumen (Scragg,

  4. A Methodology of Quantifying Precipitation Exposure for Wet-Weather Collisions and Evaluating Effectiveness of Open-Grade Asphalt Concrete as a Countermeasure

    E-Print Network [OSTI]

    Chan, Ching-Yao; Jin, Eui-Jae; Oh, Soon Mi; Ragland, David R

    2010-01-01T23:59:59.000Z

    for multilane roads. Accident Analysis and Prevention. Vol.in rainy weather. Accident Analysis and Prevention. Vol. 20,time-series model. Accident Analysis and Prevention. Vol.

  5. Eshan V. Dave,1 Andrew F. Braham,2

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    of a Flattened Indirect Tension Test for Asphalt Concrete ABSTRACT: The indirect tension test (IDT) is frequently is proposed for indirect tension testing of asphalt concrete. In place of the standard loading heads of three asphalt concrete mixtures in two flattened configurations. This integrated modeling and testing

  6. PRP is a dedicated academic and research initiative incorporating research, education, and training activities in the fields of

    E-Print Network [OSTI]

    Neimark, Alexander V.

    , and reflective cracking · Tire/pavement interaction (acoustics) and modeling · Remaining service life evaluation · Conventional and polymer-modified asphalt · Innovative materials in hot mix asphalt · Recycled materials and runways. Examples include: · Northeast pooled fund study on high recycled asphalt pave- ment (RAP) mixes

  7. Genetic analysis of the Sorghum bicolor stay-green drought tolerance trait

    E-Print Network [OSTI]

    Harris, Karen Ruth

    2009-05-15T23:59:59.000Z

    yellow seeds. In addition, a subset of the regions containing favorable alleles for stay- green from the genotype BTx642 were over represented in stay-green breeding lines. Nearly isogenic lines containing favorable alleles from BTx642 for Stg1, Stg2..., Stg3, and Stg4 in a RTx7000 (senescent) background were characterized and each NIL was shown to exhibit a stay-green phenotype. Based in part on this information, fine-mapping of Stg1 was undertaken by crossing the Stg1 NIL to RTx7000. Overall...

  8. Multiple Objective Stormwater Management For the Coliseum Complex

    E-Print Network [OSTI]

    Jones, Jesse; Kraai, Rachel

    2009-01-01T23:59:59.000Z

    methyl tertiary butyl ether (MTBE) remain in the soil around5.2 ppb xylenes, and 160 ppb MTBE remain in the groundwater

  9. Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry - An ENERGY STAR(R) Guide for Energy and Plant Managers

    E-Print Network [OSTI]

    Neelis, Maarten

    2008-01-01T23:59:59.000Z

    Ethylene dichloride 1 MTBE 2 Vinylchloride 3 Ethylbenzene 1Methyl- Tertiary-Butyl-Ether (MTBE) or Ethyl-Tertiary-Butyl-Styrene Vinylchloride MTBE Benzene, Toluene, Xylene Acetone

  10. Measurement and Characterization of Unregulated Emissions from...

    Broader source: Energy.gov (indexed) [DOE]

    Diesel PM Polycyclic organic Matter (POM) Formaldehyde Acetaldehyde 1,3-Butadiene Acrolein Benzene Toluene Ethylbenzene Xylene Polycyclic Aromatic Hydrocarbons (PAHs) Diesel...

  11. Approved for public release; distribution is unlimited. ERDC/TN APCRP-CC-15

    E-Print Network [OSTI]

    US Army Corps of Engineers

    ) and will provide an alternative to acrolein (2-propenal) and xylene (1,2-, 1,3-, and 1,4-dimethyl benzene), which

  12. EARLY PREVENTIVE EFFECTS OF RISEDRONATE IN A RAT MODEL WITH MASSIVE BONE LOSS DUE TO ORCHIDECTOMY AND

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    and disuse induced osteoporosis. ORX and BTX models were combined to see if their effects were cumulative on trabecular bone mass and bone architecture. KEY WORDS: Osteoporosis Orchidectomy Disuse Risedronate Bone-remodeling rate is observed in women after menopause or surgica

  13. Economic aspects of black bases in Texas

    E-Print Network [OSTI]

    Schoen, Wayne Ayron

    1976-01-01T23:59:59.000Z

    tensile test) versus asphalt content f or sandstone samples (not vacuum saturated). 15'3 Modulus of elasticity (by splitting tensile test) versus asphalt content for sandstone samples (after vacuum saturation) . 100 101 Effect of vacuum saturation... on modulus of elasticity (by splitting tensile test) on sandstone samples. . . . . . . . . . . . . . Modulus of elasticity (by splitting tensile test) versus asphalt content for limestone samples (not vacuum saturated). 165 166 102 Modulus of elasticity...

  14. aged material evaluations: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and evaluated its performance when used in split mastic asphalt (SMA) mixture using Marshall Characteristic and dynamic charateristics (resilient modulus). As many as 90...

  15. Techniques and Technologies for Field Detection of Asbestos Containing Materials

    Broader source: Energy.gov [DOE]

    Asbestos has been used in numerous applications at DOE sites including sprayed-on fireproofing, asphalt and vinyl floor tile, and asbestos-cement(transite) siding.

  16. Microsoft Word - san-miguel-mora-counties-fact-sheet.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assistance economic development programs: * Art Essentials * Blowin in the Wind * Concrete, Aggregate, and Asphalt Testing, LLC * Consider the Lilies Floral Boutique *...

  17. Characterization of Effective Built-in Curling and Concrete Pavement Cracking on the Palmdale Test Sections

    E-Print Network [OSTI]

    Rao, Shreenath; Roesler, Jeffery R.

    2005-01-01T23:59:59.000Z

    of Concrete and Implications for Choice of Testing Standard.J. R. Non-Destructive Testing of Concrete Pavements forAsphalt Concrete Accelerated Pavement Testing American

  18. Reflective Cracking Study: Summary Report

    E-Print Network [OSTI]

    Jones, David; Harvey, John T; Monismith, Carl L.

    2008-01-01T23:59:59.000Z

    1 HVS testing consisted of dense-graded asphalt concrete (Concrete Task Group (RACTG) was established to oversee the study, which included evaluation of pilot projects, laboratory testing,

  19. Improving the Carbon Dioxide Emission Estimates from the Combustion of Fossil Fuels in California

    E-Print Network [OSTI]

    de la Rue du Can, Stephane

    2010-01-01T23:59:59.000Z

    product consumption Nat Gas NGL Additives Crude Tot Pet.Pet Coke Lubricants Asphalt Waxes Special Naphtha Petrochem feedstocks Other Petro Prods Coal Net reconciliation error Total Consumption

  20. Truck Pavement Interactions: Requisite Research

    E-Print Network [OSTI]

    Monismith, C.L.; Lysmer, J.; Sousa, J.; Hedrick, J.K.

    1988-01-01T23:59:59.000Z

    Dynamic Loads on Highway Pavements - Part I Vehicle Re-of Asphalt Concrete Pavements," Paper presented at 67thregulation. or Truck Pavement Interactions: Requisite

  1. Caltrans Partnered Pavement Research Program (PPRC) Summary Report: Four Year Period: 2000–2004

    E-Print Network [OSTI]

    Harvey, John T; Monismith, Carl L.; Nokes, William; Coetzee, N. F

    2006-01-01T23:59:59.000Z

    from Six Initial Accelerated Pavement Tests Conducted on theBinder–Asphalt Concrete Pavement Section. Draft Report.Report prepared for the Pavement Research Center by

  2. Unintended Impacts of Increased Truck Loads on Pavement Supply-Chain Emissions

    E-Print Network [OSTI]

    Sathaye, Nakul; Horvath, Arpad; Madanat, Samer

    2009-01-01T23:59:59.000Z

    Inflation Pressure  on Pavement Response.  Transportation Model for Predicting Pavement Serviceability.   Journal of 2007) Recycling Asphalt Pavements ? A Strategy Revisited.  

  3. Data:5907426e-b60a-4078-9391-a516a97258f8 | Open Energy Information

    Open Energy Info (EERE)

    or for service to construction projects of types other than the foregoing, to rock crushers, asphalt plants, carnivals, fairs, or other non-permanent connections. Such...

  4. Opportunities for Saving Energy and Improving Air Quality in Urban Heat Islands

    E-Print Network [OSTI]

    Akbari, Hashem

    2008-01-01T23:59:59.000Z

    concrete and cement concrete porous pavements. White cementconcrete, cement concrete, and porous paver. In general, aof porous pavement is formed of asphalt or cement concrete (

  5. What You Need to Know About the Extended Federal Tax Credits...

    Office of Environmental Management (EM)

    product categories. Biomass stoves HVAC systems Insulation Roofing (metal & asphalt) Water heaters (non-solar) Windows and doors. The products above must be installed in an...

  6. Ann. Occup. Hyg., Vol. 53, No. 6, pp. 551560, 2009 The Author 2009. Published by Oxford University Press

    E-Print Network [OSTI]

    California at Berkeley, University of

    not elevated among millers). Results from linear mixed-effects models of levels of U-Nap, U-Phe, OH-Phe, and OH; exposure; PAH; urine INTRODUCTION Asphalt (also referred to as bitumen) is a by-product of petroleum refining that is widely used to pave roads. Road-paving workers are exposed to emis- sions from hot asphalt

  7. Road Materials and Pavement Design, 2013 Vol. 14, No. S2, 5778, http://dx.doi.org/10.1080/14680629.2013.812838

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Road Materials and Pavement Design, 2013 Vol. 14, No. S2, 57­78, http://dx.doi.org/10.1080/14680629.2013.812838 IlliTC ­ low-temperature cracking model for asphalt pavements Eshan V. Davea *, William G. Buttlarb for asphalt pavements located in regions with cold climate; however, most pavement design methods do

  8. Summary of Concrete Overlays Existing concrete pavement

    E-Print Network [OSTI]

    Summary of Concrete Overlays Existing concrete pavement with surface distresses Prepared surface Monolithic pavement with new concrete surface Existing asphalt pavement with surface distresses Milled pavement with asphalt surface distresses Milled and cleaned surface New 2­5 in. (5.1­12.7 cm) bonded

  9. By-Products Utilization

    E-Print Network [OSTI]

    Wisconsin-Milwaukee, University of

    Center for By-Products Utilization APPLICATION OF SCRAP TIRE RUBBER IN ASPHALTIC MATERIALS: STATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. PRODUCING CRUMB RUBBER MODIFIER (CRM) FROM USED TIRES . . . . . 3 2.1 PRODUCTION OF CRM THE UNIVERSITY OF WISCONSIN - MILWAUKEE #12;APPLICATION OF SCRAP TIRE RUBBER IN ASPHALTIC MATERIALS: STATE

  10. Hunting for that one special brick? This is the

    E-Print Network [OSTI]

    Li, Yang V.

    evolved over time. According to Boll, the bricks were originally made to be very porous and therefore their streets and sidewalks with asphalt or concrete. Boll expressed his admiration for the strength and many brick in a street, a brick street requires less maintenance than an asphalt road or concrete sidewalk

  11. Stormwater Management and the Future of Water Resources: Nutrient Controls and

    E-Print Network [OSTI]

    Facility at UNH Tc ~ 19 minutes Watershed Boundary Tree Filter Porous Asphalt Bioretention Retrofit UNHSC Separator Subsurface Infiltration Filter Unit Porous Asphalt Retention Pond Stone Swale Gravel Wetland Sand Filter Bioretention Unit Tree Filter Pervious Concrete Isolator Row Veg Swale #12;2008 Review of EPA

  12. WINTER PERFORMANCE ASSESSMENT OF PERMEABLE PAVEMENTS

    E-Print Network [OSTI]

    WINTER PERFORMANCE ASSESSMENT OF PERMEABLE PAVEMENTS A COMPARATIVE STUDY OF POROUS ASPHALT, PERVIOUS CONCRETE, AND CONVENTIONAL ASPHALT IN A NORTHERN CLIMATE BY KRISTOPHER M. HOULE BS, Worcester the University of New Hampshire, the Northern New England Concrete Promotion Association (NNECPA), the Northeast

  13. 2010 International Low Impact Development Conference San Francisco, CA

    E-Print Network [OSTI]

    that of the UNHSC Porous Asphalt Parking Lot 4" #12;UNHSC Porous Asphalt Lot UNHSC Porous Concrete Lot 11 Permeable;Introduction to Porous (Permeable) Pavements 5 #12;What are Permeable Pavements? Designed transportation or soil Permeable Pavement Types: Permeable Blocks (Pavers) Synthetic Geomatrix Pervious Concrete

  14. Recycling of pavement materials

    E-Print Network [OSTI]

    O'Neal, Randy Jim

    1976-01-01T23:59:59.000Z

    wife, Faula, whose pat cence, love, encourage? ment, and understanding made this thesis possihle. TABLE OE CONTENTS INTRODUCTION LITERATURE REVIEW Unstabilized Base Courses Stabilized Base Courses Wisconsin Portland Cement Concrete Michigan... District of Columbia California Wisconsin Texas Asphalt Concrete Massachusetts California Michigan Iowa Texas Indiana Nevada Utah Texas EXPERIMENTAL PROJECTS Portland Cement Concrete Page 10 12 12 17 20 22 24 25 Asphalt Concrete...

  15. Nitrogen utilization efficiency in sorghum cultivars

    E-Print Network [OSTI]

    Reed, Stewart Thomas

    1990-01-01T23:59:59.000Z

    . Genotypes. M35-1 Rio. IS9530 ATx623xRTx430. 16 20 23 26 29 34 40 45 55 67 67 70 70 75 CHAPTER ATx3197xRTx7000. Tx2817. SC56-14E SC326-6 SC279-14E CSM-63. SC283-14E BTx378. R8505. R8507. Page 78 78 81 86 86 91 91 96 99...-14E SC326 ? 6 SC279-14E CSM-63 SC283-14E IS9530 RIO BTx378 R8505 R8507 ATx623xRTx430 ATx3197xRTx7000 Zerazera Caudatum-Nigricans Nigricans Conspicuum Marget Conspicuum Caffrorum Kaf ir Zerazera/durra F, hybrid F, h brid 2-dwarf...

  16. Apical dominance in sorghum: the effects of modification of theactivities of auxins, cytokinins and gibberellins on tillering of two sorghum cultivars

    E-Print Network [OSTI]

    Isbell, Verne Ray

    1979-01-01T23:59:59.000Z

    and gibberellins were in- vestigated primarily with SM 100, a cul tivar possessing weak apical dominance, Likewise, the effects of possible promotive hormones (e. g. cytokini ns and gibberel lins ) were s tudied, primarily with BTx 378 (Redlan), a cultivar.... Applications of naphthyleneacetic acid (NAA) caused a marked reduction in tillerino in SM 100, but benzyladenine (BA) pro- moted tillering, especially during the first 4 weeks of seedling growth. Gibberellic acid (GA-) produced a dual response, enhancing...

  17. SIGMA-ALDRICH MATERIAL SAFETY DATA SHEET

    E-Print Network [OSTI]

    Choi, Kyu Yong

    (Polish) * Methyl toluene * NCI-C55232 * RCRA waste number U239 * Violet 3 * Xiloli (Italian) * Xylene fumes under fire conditions. Specific Method(s) of Fire Fighting: Use water spray to cool fire-exposed

  18. TRAFFIC-RELATED AIR POLLUTION. A PILOT EXPOSURE1 ASSESSMENT IN BEIRUT, LEBANON2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the use of biomarkers of exposure to benzene and BD. Personal benzene, toluene,30 ethylbenzene, and xylene as biomarker of exposure to BD in humans. Traffic policemen, who are exposed to46 hal-00914713,version1-25Jan

  19. () Trichloromethane ()1,1,2,2-1,1,2,2-Tetrachloroethane

    E-Print Network [OSTI]

    Huang, Haimei

    acetate () Ethylene glycol monobutyl ether () Ethylene glycol monomethy ether ()- O-dichlorobenzene ( ) Xylenes(o-,m-,p- isomers) () Cresol - 19 - #12;() Chlorobenzene () Amyl acetate () Isoamyl acetate () Isobutyl acetate () Isopropyl acetate () Ethyl acetate () Propyl acetate () Butyl acetate () Methyl acetate

  20. Attenuation of dilute aromatic hydrocarbon transport by a block copolymer in a compacted vertisol

    E-Print Network [OSTI]

    Akin, James Browning

    2001-01-01T23:59:59.000Z

    with benzene, toluene, ethylbenzene, and xylenes. Leachate from permeameters packed with soil containing more than 1% (wt) polymer had BTEX concentrations below the drinking water standard for 3 or more pore volumes. The findings of this research were applied...

  1. Tracking a defined route for O2 migration in a dioxygen-activating diiron enzyme

    E-Print Network [OSTI]

    Song, Woon Ju

    For numerous enzymes reactive toward small gaseous compounds, growing evidence indicates that these substrates diffuse into active site pockets through defined pathways in the protein matrix. Toluene/o-xylene monooxygenase ...

  2. Structural investigations of hydroxylase proteins and complexes in bacterial multicomponent monooxygenase systems

    E-Print Network [OSTI]

    McCormick, Michael S. (Michael Scott)

    2008-01-01T23:59:59.000Z

    Bacterial multicomponent monooxgenases (BMMs) such as toluene/o-xylene monooxygenase (ToMO), phenol hydroxylase (PH), and soluble methane monooxygenase (sMMO) catalyze hydrocarbon oxidation reactions at a carboxylatebridged ...

  3. Evaluation of Gel Permeation Chromatography as an analytical tool for aspect cement testing

    E-Print Network [OSTI]

    Holmgreen, Richard J

    1985-01-01T23:59:59.000Z

    : . Dona S a (Chairman f Committee) Dr. D. N. Litt e (Member) Jer y A. Bullin ember) Dr. Dona d McDonald (Head of Department) May 1985 ABSTRACT Evaluation of Gel Permeation Chromatography as an Analytical Tool for Asphalt Cement Testing (Nay..., Common to Dickens and Dumas 35 36 37 39 15 Chromatograms of Virgin Asphalt E, AC-10, Common to Dickens and Dumas 40 16 Chromatograms of' Virgin Asphalt 8, AC-20, Common to Dickens and Lufkin 41 F iciure 17 18 19 20 21 22 23 24 25 26 27...

  4. Evaluation of methods of mixing lime in bituminous paving mixtures in batch and drum plants 

    E-Print Network [OSTI]

    Button, Joseph Wade

    1984-01-01T23:59:59.000Z

    ) Joseph Wade Button, B. S. , Texas ASM University Co-Chairmen of Advisory Committee: Mr. Bob M. Gallaway and Dr. Dallas N. Little A field test was conducted to evaluate the use of hydrated lime as an antistrip additive in hot mix asphalt concrete.... Lime was added in the pugmill of the batch plant, on the cold feed belt, and through the fines feeder of the drum mix plant. The asphalt and aggregates used were characterized in the laboratory. Asphalt concrete mixture tests included laboratory...

  5. Use of pyrolyzed carbon black as an additive (part 3. Air-cooled furnace slag). Final report

    SciTech Connect (OSTI)

    Lee, K.H.; Lovell, C.W.; Salgado, R.

    1996-11-20T23:59:59.000Z

    Scrap tires, generated at the rate of over 242 million each year in the United States, are recognized as one of the most significant environmental problems. Most of these scrap tires have been disposed of in landfills, stockpiles, and illegal dumps (EPA 1991). There is a need to find more useful, environmentally friendly applications for these tires. Extensive researches have been conducted in the past years on the utilization of the scrap tires. The use of scrap tires for asphalt pavement, which is complicated by the complex behavior of asphalt, has received major attention. This research aims to describe the performance of mixtures of asphalt using pyrolyzed carbon black as an additive.

  6. WUFIINSTRUCTORS Andr Desjarlais is the Group Leader for the

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    IBP WUFIINSTRUCTORS André Desjarlais is the Group Leader for the Building Envelope and Materials Construction Association, Asphalt Roofing Manufacturers Association, and the Building Environment and Thermal Envelope Council. Areas of expertise include building envelope and material energy efficiency, moisture

  7. The effect of tree shade on home summer electrical consumption

    E-Print Network [OSTI]

    Rudie, Raymond Joseph

    1982-01-01T23:59:59.000Z

    materials. As compared to a rural soil surface (i. e. natural or disturbed soil surfaces either vegetated or bare), typical city surfaces such as concrete and asphalt have greater densities and higher heat capacities (Duckworth and Sandberg 1954) which...

  8. Caltrans Partnered Pavement Research Program (PPRC) Summary Report: Four Year Period: 2000–2004

    E-Print Network [OSTI]

    Harvey, John T; Monismith, Carl L.; Nokes, William; Coetzee, N. F

    2006-01-01T23:59:59.000Z

    conducted. HVS testing for concrete pavements has includedand Testing of Fast-Setting Hydraulic Cement Concrete inConcrete and Asphalt-Rubber Hot Mix Overlays at Moderate Temperatures--Accelerated Pavement Testing

  9. Reflective Cracking Study: First-level Report on HVS Testing on Section 588RF - 90 mm AR4000-DOverlay

    E-Print Network [OSTI]

    Jones, David; Wu, R; Harvey, John T

    2008-01-01T23:59:59.000Z

    testing being performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the results of the fourth HVS reflective cracking testingconcrete. It describes the results of the fourth HVS reflective cracking testing

  10. Reflective Cracking Study: First-Level Report on HVS Testing on Section 590RF - 90 mm MB4-G Overlay

    E-Print Network [OSTI]

    Jones, David; Tsai, Bor-Wen; Harvey, John T

    2008-01-01T23:59:59.000Z

    testing being performed to validate Caltrans overlay strategies for the rehabilitation of cracked asphalt concrete.concrete. It describes the results of the first HVS reflective cracking testingconcrete. It describes the results of the first HVS reflective cracking testing

  11. Development of methods to quantify bitumen-aggregate adhesion and loss of adhesion due to water 

    E-Print Network [OSTI]

    Bhasin, Amit

    2007-09-17T23:59:59.000Z

    , mixture design parameters, loading conditions and environmental factors. Traditional methods to assess moisture sensitivity of asphalt mixes rely on mechanical tests that evaluate the mix as a whole. These methods do not measure material properties...

  12. Agents of seed dispersal : animal--zoochary / Wind--anemonochory

    E-Print Network [OSTI]

    Lysakowski, Lukasz Kamil, 1974-

    2004-01-01T23:59:59.000Z

    Agents of seed dispersal is a project designed to address the increase of environmental degradation, which occurs as a result of the perpetual spread of the asphalt and concrete of the contemporary urban situation. Agents ...

  13. Evaluation of an alternative bituminous material as a soil stabilizer

    E-Print Network [OSTI]

    Kim, Yong-Rak

    1999-01-01T23:59:59.000Z

    . Consequently, development of a new stabilization material, which is environmentally safe and non-flammable, is desired for replacing cutback asphalts. In this study a petroleum-resin-based (PRB) material was tested to investigate its physical and mechanical...

  14. CX-012613: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Repair/Reseals Concrete and Asphalt Covers at R- Reactor Seepage Basin CX(s) Applied: B1.3Date: 41801 Location(s): South CarolinaOffices(s): Savannah River Operations Office

  15. Bituminous pavement recycling Aravind K. and Animesh Das

    E-Print Network [OSTI]

    Das, Animesh

    Bituminous pavement recycling Aravind K. and Animesh Das Department of Civil Engineering IIT Kanpur Introduction The bituminous pavement rehabilitation alternatives are mainly overlaying, recycling and reconstruction. In the recycling process the material from deteriorated pavement, known as reclaimed asphalt

  16. Investigation of the June 29, 2012, Fall from a Fixed Ladder...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    the fixed ladder and fell from a height of approximately 15-feet landing on asphalt pavement. Investigation of the June 29, 2012, Fall from a Fixed Ladder at Building 830, at the...

  17. TERRAIN ESTIMATION USING INTERNAL SENSORS Debangshu Sadhukhan, Carl Moore, Emmanuel Collins

    E-Print Network [OSTI]

    Collins, Emmanuel

    was successful in identifying gravel, packed dirt, and grass. KEY WORDS Mobile robot, terrain identification. For our research "sensing terrain" means determining the type of terrain, i.e.: gravel, sand, asphalt, mud

  18. 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4 www.schulich.ucalgary.ca FOR IMMEDIATE RELEASE

    E-Print Network [OSTI]

    Calgary, University of

    Jadzinski (1st Prize) Paving Asphalt Modification with Tire Crumb Rubber with and without used lubricating oil Ameli Pereira (2nd Prize) Comparison of Direct Tension Test and the Ontario Ministry

  19. Evaluation of an alternative bituminous material as a soil stabilizer 

    E-Print Network [OSTI]

    Kim, Yong-Rak

    1999-01-01T23:59:59.000Z

    characteristics as an alternative bituminous soil stabilizer in terms of replacing the cutback asphalts because the PRB material has been proved an environmentally safe material. Based on various laboratory tests, including an unconfined compressive strength test...

  20. University of New Hampshire Stormwater Center

    E-Print Network [OSTI]

    3 Highlights 4 Field Research Site 8 Focus Area 10 Stormwater Treatment System Data Porous Asphalt 12 Pervious Concrete 14 Permeable Interlocking Concrete Pavement 16 Subsurface Gravel Wetland 18

  1. Low impact development practices terms and definitions developed by Regional language bank partners 2010

    E-Print Network [OSTI]

    Tullos, Desiree

    are permeable pavers, pervious concrete, porous asphalt and gravel. 11. stormwater runoff using rain gardens, planters, swales, porous pavement, tree canopy and other methods. #12;10. porous pavement - Surface to walk, drive or park

  2. LEED Study Session Session #3: Buildings

    E-Print Network [OSTI]

    Zaferatos, Nicholas C.

    that allow water to penetrate and infiltrate the soil below. o Pervious (no fines) concrete o Porous Asphalt Sites Credit 6: Stormwater Management #12;Pervious Paving What is it? Newer, porous paving systems

  3. The development of correlations between HMA pavement performance and aggregate shape properties 

    E-Print Network [OSTI]

    McGahan, Jeremy

    2006-04-12T23:59:59.000Z

    The physical characteristics of aggregates (form, angularity, and texture) are known to affect the performance of hot mix asphalt (HMA) pavements. Efforts to develop relationships between these aggregate characteristics ...

  4. Recycled Unbound Base Pooled Fund Study

    E-Print Network [OSTI]

    Minnesota, University of

    Recycled Unbound Base Pooled Fund Study Tuncer B. Edil Recycled Materials Resource Center Geological Engineering Program University of Wisconsin-Madison #12;·! Recycled Concrete Aggregate (RCA absorption ­! Un-Hydrated cement increases strength and durability ·! Recycled asphalt pavement (RAP

  5. Application of the Modified Methylene Blue Test to Detect Clay Minerals in Coarse Aggregate Fines

    E-Print Network [OSTI]

    Pitre, Brandon

    2012-12-04T23:59:59.000Z

    mix asphalt (HMA) and Portland cement concrete (PCC) mixes was also conducted. In one phase of the study, known amounts of standard clay minerals were introduced to the mixes, and performance testing was carried out. This was done in hopes...

  6. Cleaning up the Streets of Denver

    SciTech Connect (OSTI)

    Stegen, R.L.; Wood, T.R.; Hackett, J.R. [Parsons, 1700 Broadway, Suite 900, Denver, Colorado 80290 (United States); Sogue, A. [City and County of Denver, 201 West Colfax, Denver, Colorado 80202 (United States)

    2006-07-01T23:59:59.000Z

    Between 1913 and 1924, several Denver area facilities extracted radium from carnotite ore mined from the Paradox basin region of Colorado. Tailings or abandoned ores from these facilities were apparently incorporated into asphalt used to pave approximately 7.2 kilometers (4.5 miles) of streets in Denver. A majority of the streets are located in residential areas. The radionuclides are bound within the asphalt matrix and pose minimal risk unless they are disturbed. The City and County of Denver (CCoD) is responsible for controlling repairs and maintenance on these impacted streets. Since 2002, the CCoD has embarked on a significant capital improvement project to remove the impacted asphalt for secure disposal followed by street reconstruction. To date, Parsons has removed approximately 55 percent of the impacted asphalt. This paper discusses the history of the Denver Radium Streets and summarizes on-going project efforts. (authors)

  7. Accelerated Wear Tests on Common Floor-covering Materials.

    E-Print Network [OSTI]

    Stewart, B. R.; Kunze, O. R.; Hobgood, Price.

    1958-01-01T23:59:59.000Z

    *'r** qd** ""~c- web*- !,* . flccelerated Wear Tests e" f loor-couering materials AGRICULTURAL EXPERIMENT STATION R. D. LEWIS, DIRECTOR, COLLEGE STATION. TEXAS SUMMARY I .. - " : 5: Accelerated wear tests made on six common floor covering... materials indicated there are variations in the changes of appearance and wear in these materials. Solid sheet vinyls and rubber tiles showed significantly less wear than asphalt tiles, vinyl- asbestos tiles, linoleums and cork. Asphalt tiles showed...

  8. Extension and replacement of aspalt cement with sulphur

    E-Print Network [OSTI]

    Pickett, Daniel Ernest

    1977-01-01T23:59:59.000Z

    supply of sulphur, it would be advantageous to reduce the dependence of the paving industry upon asphalt cement while utilizing effectively the readily available sulphur. An investigation was made of the use of elemental sulphur as a partial... purpose: an outlet would be pro- vided for the current oversupply of sulphur, and the dependence of the paving industry upon the use of asphalt cement would be reduced. Another potential benefit is the possibility of improved performance of pavements...

  9. Economic aspects of black bases in Texas 

    E-Print Network [OSTI]

    Schoen, Wayne Ayron

    1976-01-01T23:59:59.000Z

    such that an optimal asphalt content for each aggregate type could be determined. Test method Tex-126-E requires that the 6-inches in diameter by 8-inches in height samples be failed in unconfined compression and from these results an optimum asphalt content... procedure and two would not. The purpose of the vacuum saturation procedure was to determine the effect of water on the black base mixtures. At present, an acceptable national standard vacuum saturation procedure does not exist. Therefore, a test...

  10. The effects of height genes and gibberellic acid on root and shoot development of Sorghum bicolor (L.) Moench

    E-Print Network [OSTI]

    Wright, Steven Alan

    1978-01-01T23:59:59.000Z

    after emergence (days). Fige 6 ~ Each tracing is a composite of all roots formed by two SM100 plants up to and including the indicated number of days after emergence (days). Fig. 7. Each tracing is a composite of all roots formed by two FC 8962(TM... for the kafir varieties FC 8962(TM) and BTx616. 63 Fig. 13 Plant height, leaf area, root length, and ratio of leaf area to root length (LA/RL) for SA1170 and SM100 plants grown in hydro- ponic culture during the summer. . . . . . . . . . . . . . 66 Fig. 14...

  11. Hydrocarbon Processing`s HPI construction boxscore update

    SciTech Connect (OSTI)

    NONE

    1996-02-01T23:59:59.000Z

    Data are compiled for oil and gas industry construction projects worldwide, listing country (and state or province, when appropriate), company, location of the project, purpose, plant capacity, estimated cost, current status, licensor, engineering firm, and construction company. Projects include carbon monoxide, urea, ammonia, isomerizer, hydrogen, alkylation, TAME, desalter, hydrotreating, sulfur, waste gas cleanup, catalytic reformer, ethylene recovery, natural gas helium, nitrogen removal, NGL recovery, cumene, dewaxer, polystyrene, vinyl chloride, synthesis gas, formaldehyde, FCC cracker, isobutylene, H{sub 2}S removal, cogeneration, methanol, delayed coker, gas oil treater, NGL fractionation, BTX, information systems, control systems, waste water cleanup, glycol treater, acid gas removal, LPG, MTBE, caustic cleanup, visbreaker, naphtha treater, and others.

  12. Factors affecting the porridge quality of sorghum and pearl millet

    E-Print Network [OSTI]

    Kante, Assa

    1987-01-01T23:59:59.000Z

    ), and hybrids ATx623 * CSM63 (red glumes) and ATx623 * CSM63 (black glumes). Also used was CSM63, a local variety in Mali, which is an early cycle in the USA, and BTx623 as a typical USA sorghum. All of the sorghum cultivars were from the Sorghum Food Type... from very corneous (SC303, 1. 0 and SC605, 1. 3) to floury (SC90, 3. 8, RS610, 3. 6, and ATx623 * CSM63 red and black glumes, 4. 0). Akingbala (1982) reported that grain hard- ness was correlated with grain texture, which was confirmed in this study...

  13. Investigation of cracking and leaking of nuclear reactor pools

    E-Print Network [OSTI]

    Cooper, William Bernard

    1965-01-01T23:59:59.000Z

    *ion of the pool was lined with a 0. 2y in, aluminum I'xxer which hss since corroded. snd. pitted. allowing the dent nex slimed watel' used xxx the pool to come into dix'ec't contact with the concx etc pool wall. Pigure Hc, LacBtx one oi l&BkBg?e A mare detai3... good, Job i'or several years without, renovation, [0] This type of reactor has, however, developed. some maJor problems that have?or will, require r'enovation ~ Figure l. Nuclear Science Center Reactor Facie. ity at, Texas A& University...

  14. The determination of area source emission factors using whole air sampling

    E-Print Network [OSTI]

    Shannon, Harriet Patricia

    1992-01-01T23:59:59.000Z

    , Tedlar bags have been shown to be transparent to ground level radiation . They are also 18 difficult to clean and are subject to sample loss through permeation . Studies have shown that toluene and xylenes 14 show an appreciable loss if exposed... rates from a land treatment facility. The observed solvent concentrations ranged from 3. 2, to 0. 1 gg/m for benzene, 5. 0 to 1. 1 ug/m for toluene, and 9. 2 3 3 to 0. 7 pg/m for xylene. Monitoring results were compared 3 to concentrations predicted...

  15. LEACHING BEHAVIOR OF PETROLEUM CONTAMINATED SOILS STABILIZED WITH HIGH CARBON CONTENT FLY ASH

    E-Print Network [OSTI]

    Aydilek, Ahmet

    . Approximately 90% of the coal used in United States is burned to produce electricity. As a result, the power and o-xylene, and a tertiary model non-aqueous phase liquid were used as the pollutants in batch for alternative approaches, such as soil stabilization by addition of a binder to adsorb the pollutant(s) while

  16. NOTE: This chemical resistant chart is presented as a guide only. This does not consider permeability of glove, chemical combinations, temperature, length of time that glove is in contact with the chemical and thickness of

    E-Print Network [OSTI]

    Slatton, Clint

    Hexane NR E E NR Hydraulic Fluid Petro. Based P E F G Hydraulic Fluid Ester Based P P P P Hydrazine 65% G NR E E F Turbine Oil P G E F Turpentine P E G P Vegetable Oil P E E F Xylene NR G P NR *Basic

  17. 1,2,4-Trimethylbenzene Transformation Reaction Compared with its Transalkylation Reaction with Toluene over USY Zeolite Catalyst

    E-Print Network [OSTI]

    Al-Khattaf, Sulaiman

    1,2,4-Trimethylbenzene Transformation Reaction Compared with its Transalkylation Reaction. This shows that toluene would rather accept a methyl group to transform to xylene than lose a methyl group for transformation of TMB. Cejka et al.3 studied the effect of the structure of large-pore zeolites of beta, Y, L

  18. Biodegradation 10: 331340, 1999. 2000 Kluwer Academic Publishers. Printed in the Netherlands.

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    patterns when microbes are exposed to different BTEXN mix- tures. For example, toluene, which is generally. Abstract This work investigated the biodegradation capabilities of indigenous microorganisms exposed specificity of 55 strains. Toluene was the most commonly degraded compound, followed by p-xylene, m

  19. Statement for the Committee on Health, Education, Labor, and Pensions United States Senate June 15, 2010

    E-Print Network [OSTI]

    Bandettini, Peter A.

    and exposed communities, and a report on NIEHS's early and ongoing role in helping to protect oil spill and more toxic components, such as benzene, toluene, and xylene. These and other volatile organic compounds effects such as cancer, birth defects, and neurological effects. Oil that has been exposed to air

  20. Indoor Air Quality Survey of Boston Nail Salons

    E-Print Network [OSTI]

    Fraden, Seth

    ) suggest that spontaneous abortion in workers exposed to toluene may occur nearly 3 times more than salon owners and workers Nail salon employees are of reproductive age and are exposed to chemicals and Health Xylene, toluene, acetone, and methyl ethyl ketone in nail polishes and hardeners are neurological

  1. Statement for the Energy and Commerce Committee Subcommittee on Health United States House of Representatives

    E-Print Network [OSTI]

    Bandettini, Peter A.

    and exposed communities, and a report on NIEHS's early and ongoing role in helping to protect oil spill and more toxic components, such as benzene, toluene, and xylene. These and other volatile organic compounds effects such as cancer, birth defects, and neurological effects. Oil that has been exposed to air

  2. Review Paper/ Crude Oil at the Bemidji Site: 25 Years of

    E-Print Network [OSTI]

    and water flow, vapor diffusion, and the progression of biodegradation. Pore-scale capillary pressure large residual oil saturations. Hydrocarbon attenuation and plume extent was a function of groundwater of ground- water contamination by benzene, toluene, ethylbenzene, and xylenes (BTEX) (Council

  3. Self-Assembled Nanostructures of Rod-Coil Diblock Copolymers with Different Rod Lengths

    E-Print Network [OSTI]

    Wan, Xin-hua

    melts1-5 or in a selective solvent.5-9 As the former is yet to be fully exploited, the latter, the self of the block copolymers in p-xylene, which is a good solvent for the PS coils and a selective solvent for the PMPCS rods, was studied by dynamic and static laser light scattering (LLS) and transmission electron

  4. Carbon-Oxygen Bond Activation in Esters by Platinum(0): Cleavage of the Less Reactive Bond

    E-Print Network [OSTI]

    Jones, William D.

    esters in the presence of trialkylphosphines to give -allyl addition products.2 Acetate and benzoate-O oxidative addition to give -allyl products. Vinyl esters (acetate and benzoate) were also reported of the solution. Reaction with Allyl Acetate. Treatment of 1 with 10 equiv of allyl acetate in p-xylene-d10 at 160

  5. Flux Measurements of Volatile Organic Compounds from an Urban Tower Platform in Houston, Texas: Trends and Tracers

    E-Print Network [OSTI]

    Hale, Martin C

    2014-05-08T23:59:59.000Z

    , and xylenes (BTEX) from winter 2009 compared to spring 2013. Median concentrations over the four-year period fell between 20 to 34 percent, comparable to long-term VOC reduction trends observed in other major metropolitan areas. Emissions of these species fell...

  6. ORIGINAL PAPER Biostimulation of anaerobic BTEX biodegradation

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    -methanogenic biostimulation could enhance source zone bioremediation of ground- water aquifers impacted by biodiesel blends of biodiesel could lead to a higher frequency of ground- water contamination by accidental and incidental- zene and xylenes isomers) or PAHs (polycyclic aromatic hydrocarbons), which can become co-occur- ring

  7. Water Research 38 (2004) 25292536 The use of isotopic and lipid analysis techniques linking

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    2004-01-01T23:59:59.000Z

    , ethylbenzene and xylenes (i.e., BTEX) are common ground water pollutants that threaten water suppliesWater Research 38 (2004) 2529­2536 The use of isotopic and lipid analysis techniques linking used recently as an environmental forensics tool to demonstrate microbial degradation of pollutants

  8. Liquid-liquid equilibria for ternary systems containing hydrocarbons and propylene carbonate

    SciTech Connect (OSTI)

    Annesini, M.C.; Gironi, F.; Marrelli, L.

    1985-04-01T23:59:59.000Z

    Experimental data of liquid-liquid equillibrium at 20/sup 0/C are reported for six ternary systems containing propylene carbonate with n-hexane-benzene, n-hexane-ethylbenzene, n-heptane-toluene, n-heptane-ethylbenzene, n-octane-o-xylene, and n-octane-ethylbenzene. The data are correlated by means of NRTL and UNIQUAC models and relative parameters are given.

  9. Unusual Function of Modified Polyolefins for Manipulating Magnetic Nanostructures

    E-Print Network [OSTI]

    Guo, John Zhanhu

    (CO)5 or Co2(CO)8] in the presence of PP-g-MA in solvent xylene. By simply changing the backbone length. Among many developed approaches (high-temperature reduction, evapo- ration­condensation, melting-dependent physicochemical properties. The morphology (size and shape) control of magnetic NPs by many small molecular

  10. M(^\\/71\\ Ris-M-2739 3 Determination of "Tc in

    E-Print Network [OSTI]

    . The evaporation rates of Ru04 and Tc04~ are determined at 100°C in 0.1 N H2S04. A higher decontamination factor 2/xylene extraction at controlled valence are used for decontamination of ruthenium, »°n>Ag and other nuclides Experimental S Procedure 6 Principle 6 Determination of die chemical yield of"Tc and decontamination factor for

  11. EuropeanCommunities,2007 First results from the new JRC greenhouse gas monitoring site at Ispra, Italy

    E-Print Network [OSTI]

    ) and the biomass burning tracer acetonitrile. Additional air quality measurements (e.g. carbon monoxide, N2O, CO and the biomass burning tracer acetonitrile (CH3CN) during the 2007/08 winter we are able on acetonitrile as a tracer for biofuel burning emissions and benzene, toluene, and xylenes as tracers for fossil

  12. Demonstrating the efficacy of bioventing using radiotracers

    SciTech Connect (OSTI)

    Baker, R.S. [ENSR Consulting and Engineering, Acton, MA (United States); Ghaemghami, J.; Simkins, S.; Mallory, L.M. [Univ. of Massachusetts, Amherst, MA (United States)

    1994-12-31T23:59:59.000Z

    Direct evidence to support the effectiveness of bioventing was obtained in columns simulating unsaturated zone dynamics. Fine sandy loam from the capillary fringe of a site contaminated with toluene and xylenes was packed into glass columns. Radiolabeled [U-ring-{sup 14}C] toluene and [U-ring-{sup 14}C] m-xylene were separately added to gamma-irradiated control columns and identical nonsterile columns. Toluene (or m-xylene) and CO{sub 2} present in air drawn through the soil were continuously captured in organic vapor and NaOH traps, respectively. The addition of a radiotracer to all columns permitted an accounting of the contaminant mass balance among volatilized, biodegraded, residual, and leached fractions. During two trials involving {sup 14}C-toluene and {sup 14}C-m-xylene, 46 to 57% and 40 to 46%, respectively, of the added {sup 14}C was oxidized to {sup 14}CO{sub 2} in the nonsterile columns, demonstrating that bioremediation had been effective. Volatilization of 75% of added {sup 14}C-toluene and 54% of added {sup 14}C-m-xylene occurred in the sterile controls, whereas the nonsterile columns experienced volatile losses of less than 0.4% and 0.7%, respectively. As virtually no volatile hydrocarbons were detected in the offgas over the course of the bioventing tests from the nonsterile columns, despite the high airflow rate (15 to 20 pore volumes d{sup {minus}1}), offgas treatment may prove unnecessary during bioventing of some field sites.

  13. e-mail: huscap@lib.hokudai.ac.jp : 4025 1. A Composite Construction Material that Solidifies in

    E-Print Network [OSTI]

    Ishii, Hitoshi

    in asphalt mixtures during the wheel tracking test at high temperatures, Construction and Building Materials pavements due to exposure to organic compounds in a cold region, Construction and Building Materials, vol-mail: huscap@lib.hokudai.ac.jp : 4025 #12;HUSCAP 1. A Composite Construction Material that Solidifies in Water

  14. Technical Report Documentation Page 1. Report No.

    E-Print Network [OSTI]

    Texas at Austin, University of

    manufacturing companies. Toner, the dry ink used in laser printers and copiers, can be blended in to asphalt specifications for use in copiers or printers and consequently becomes a waste product of the manufacturing process. This manufacturing waste along with the spent toner from copiers and printers is dumped

  15. Technical Report Documentation Page 1. Report No.

    E-Print Network [OSTI]

    Texas at Austin, University of

    of toner is produced for copiers and printers by toner manufacturing companies. Toner, the dry ink used in laser printers and copiers, can be blended in to asphalt to improve strength and temperature resistance and consequently becomes a waste product of the manufacturing process. This manufacturing waste, along

  16. RIS-M-2273 WEATHERING AND DECONTAMINATION OF RADIOACTIVITY DEPOSITED ON

    E-Print Network [OSTI]

    the decontamination of Rubidium86 (representing Cesium134 and 137) Barium-Lanthanum 140 and Ruthenium103 deposited for calculating doses to the population in the land contamination project (Risø-R-462). INIS descriptors: REACTOR ACCIDENTS; EXTERNAL IRRADIATION; GAMMA RADIATION; FISSION PRODUCTS; ROADS; ASPHALTS; SURFACE CONTAMINATION

  17. Structural Change, Impacts and Opportunities For Concrete Pavement

    E-Print Network [OSTI]

    Formed Asia (excluding Japan) = 20% world Oil Demand OPEC Induced Energy Crisis New Reality: Emphasis on LDC's & Demand Side Old Reality: Emphasis on OPEC & Supply Side #12;Asphalt &Oil Price Correlation (excluding Japan) = 20% world Oil Demand Old Reality: Emphasis on OPEC & Supply Side New Reality: Emphasis

  18. Disk-shaped Compact Tension Test for Plain Concrete A. Amirkhanian1

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Disk-shaped Compact Tension Test for Plain Concrete A. Amirkhanian1 , D. Spring1 , J. Roesler1 , K cracking prediction of concrete pavement systems. The single-edge notched beam test has been used energy in asphalt concrete using the disk-shaped compact tension (DCT) test. The benefit of this specimen

  19. Society for Range Management and Weed Science Society of America, "Working landscapes providing for the future", February 711 2010, Denver, Colorado. p80.

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    , and Balbach H Dispersal of plant propagules by vehicles. Secondary dispersal of plant propagules by vehicles is generally perceived to be important in the spread of invasive species, though with only to vehicles will depend on a number of factors including type of ground surface (asphalt, gravel, or unpaved

  20. Montana Weed Control Association Annual Meeting. January 11th 2011, Great Falls, MT.

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Seed movement by vehicles: how many, how far, and under what conditions? Movement of seeds by vehicles is generally thought to increase the spread of invasive plant species, but few studies have vehicles when driven a range of distances on different surfaces (asphalt, unpaved and offroad) under wet

  1. RUNOFF QUALITY FROM ROOFING MATERIALS DURING EARLY LIFE Shirley E. Clark, Brett V. Long, Christina Y.S. Siu, Julia M. Hafera, Kelly A Steele

    E-Print Network [OSTI]

    Clark, Shirley E.

    Y.S. Siu, Julia M. Hafera, Kelly A Steele Penn State Harrisburg Middletown, PA 17057 Corresponding Harrisburg campus. The cedar shakes and asphalt shingles were installed in August 2005 (the data reported materials were purchased from Lowes Home Improvement Stores in Harrisburg, PA. The pans containing the green

  2. Energy sources for a secure (?) and clean (?) energy future

    E-Print Network [OSTI]

    Hughes, Larry

    , International Energy Outlook 2008 #12;Where will the oil come from? · By 2015 the world will need another four: ­ Pesticides ­ Plastics ­ Cosmetics ­ Asphalt Source: IEA, Key World Energy Statistics, 2006 #12;Oil production 2005 2006 2007 Billion(109)barrels Production Consumption Source: BP Statistical Review of World Energy

  3. VILKNER, Glass Concrete with Carpet Fibers, 1/10 Fax: +1 212 854 7267

    E-Print Network [OSTI]

    Meyer, Christian

    , such as mass concrete or asphalt. A well-known success story is the use of fly ash, a byproduct of coal an environmental burden. 1. Introduction In the light of continuously growing disposal costs today's waste streams are being studied with increasing care for their recycling potential. A straight forward approach to dispose

  4. Lignite pellets and methods of agglomerating or pelletizing

    DOE Patents [OSTI]

    Baker, Albert F. (Pittsburgh, PA); Blaustein, Eric W. (Pittsburgh, PA); Deurbrouck, Albert W. (Pittsburgh, PA); Garvin, John P. (Pittsburgh, PA); McKeever, Robert E. (Pittsburgh, PA)

    1981-01-01T23:59:59.000Z

    The specification discloses lignite pellets which are relatively hard, dust resistant, of generally uniform size and free from spontaneous ignition and general degradation. Also disclosed are methods for making such pellets which involve crushing as mined lignite, mixing said lignite with a binder such as asphalt, forming the lignite binder mixture into pellets, and drying the pellets.

  5. February 4, 2013 Gary Krueger

    E-Print Network [OSTI]

    Netoff, Theoden

    February 4, 2013 Gary Krueger Remediation Division Minnesota Pollution Control Agency 520 Lafayette LLC intend to develop the AUF to support the recently permitted sand and gravel mining operations at the UMA. The AUF will include a sand and gravel processing area, asphalt, concrete and recycled aggregate

  6. 7. Low temperature cracking in HMA Pavement Cracking Al-Qadi, Scarpas & Loizos (eds)

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    7. Low temperature cracking in HMA 367 #12;#12;Pavement Cracking ­ Al-Qadi, Scarpas & Loizos (eds, Storrs, Connecticut, USA ABSTRACT: Low temperature cracking remains one of the major pavement distresses in asphalt concrete pavements in cold regions. An integrated laboratory testing, field performance data

  7. A four-point bending test for the bonding evaluation of composite pavement

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A four-point bending test for the bonding evaluation of composite pavement M. Hun1 , A. Chabot1 , F investigate the crack initiation and propagation at the interface between layers of composite pavements affects the durability of composite pavements made with asphalt and cement materials. Two main problems

  8. OKLAHOMA DEPARTMENT OF TRANSPORTATION PAVEMENT AND BRIDGE DECK SMOOTHNESS REQUIREMENTS

    E-Print Network [OSTI]

    OKLAHOMA DEPARTMENT OF TRANSPORTATION SUMMARY OF PAVEMENT AND BRIDGE DECK SMOOTHNESS REQUIREMENTS), HMA (hot mix asphalt), PCCP (P.C. concrete pavement) and Bridge Decks. Areas where 1/8 to 1/2 inch per written specifically for Pavement Smoothness which is summarized below and is also attached for your

  9. Surface Loading of a Multilayered Viscoelastic Pavement: Semianalytical Solution

    E-Print Network [OSTI]

    Pan, Ernie

    Surface Loading of a Multilayered Viscoelastic Pavement: Semianalytical Solution Ewan Y. G. Chen1 response of a linear viscoelastic pavement. The material parameters of the asphalt concrete analytically. Therefore, responses of the viscoelastic pavement are finally expressed analytically in the time

  10. 1 INTRODUCTION A typical flexible pavement system includes four

    E-Print Network [OSTI]

    Zornberg, Jorge G.

    1 INTRODUCTION A typical flexible pavement system includes four distinct layers: asphalt concrete course in order to reduce costs or to minimize capil- lary action under the pavement. Figure 1: Cross-section of flexible pavement system (Muench 2006) Pavement distress may occur due to either traffic or environmental

  11. Conservation of Heat Energy at Hot Petroleum Products Terminals 

    E-Print Network [OSTI]

    Powell, J. C.; Graham, R. M.

    1981-01-01T23:59:59.000Z

    Exxon operates several terminals which store asphalt and heavy fuel oil. Due to the rising cost of fuels, Exxon initiated a study to identify economic investments which would reduce the fuel needed to heat these products. First, fuel usage at four...

  12. INTRODUCTION Current roadway quality control and quality acceptance (QC/QA) procedures for the Louisiana Department ofTransportation and Development

    E-Print Network [OSTI]

    Harms, Kyle E.

    , and air voids in hot mix asphalt (HMA) pavements and thickness and compressive strength for Portland-place determination of pavement properties, resulting in an increase in sampling frequency to supplement coring obtained from cores and cylinders to field properties obtained from LWD and PSPA. OBJECTIVE

  13. COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement

    E-Print Network [OSTI]

    COLORADO DEPARTMENT OF TRANSPORTATION Sustainability of Concrete Pavement I-225 - Mississippi to 6 · 2 Mile Reconstruction Existing: · 4 Lane Divided Highway · 8" Concrete Pavement (Recycled on-site) · 4" Asphalt Overlay (Recycled off-site) Project Design: · 6 Lane Divided Highway · 13" Concrete

  14. By-Products Utilization

    E-Print Network [OSTI]

    Wisconsin-Milwaukee, University of

    Center for By-Products Utilization PROPERTIES OF CONCRETE CONTAINING SCRAP TIRE RUBBER in a variety of rubber and plastic products, thermal incineration of waste tires for production of electricity rubber in asphalt mixes, (ii) thermal incineration of worn-out tires for the production of electricity

  15. APPROVED STRATEGIC PLAN University Transportation Center for

    E-Print Network [OSTI]

    Engineering CSD Center for Structural Durability ETG Education Task Group FAA Federal Aviation Administration FHWA Federal Highway Administration FTA Federal Transit Administration HMA Hot-Mix Asphalt ISR Technologies Administration U.S. Department of Transportation Washington, D.C. 20590 Submitted By Michigan

  16. Terrain Characterization and Classification with a Mobile

    E-Print Network [OSTI]

    Borenstein, Johann

    , commonly known categories, such as gravel, sand, or as- phalt. Terrain characterization, on the other hand aims at associating terrain with well-defined categories, such as gravel, sand, or dirt. A related for a turn is lower when driving over sand or wet grass than when driving on packed dirt or asphalt. In order

  17. How do we create a m re sustainable

    E-Print Network [OSTI]

    for cold climates, and in- vestigating the use of recycled asphalt materials and other industrial by-products including shingles and tires. With diminishing available sources of high quality virgin aggregate, developing the use of lower quality aggregate sources and recycled aggregate materials in the con- struction

  18. Technical Report Documentation Page 1. Report No.

    E-Print Network [OSTI]

    . Recipient's Catalog No. 5. Report Date April 2006 4. Title and Subtitle FIBERS FROM RECYCLED TIRE of Texas Project Title: Fibers From Recycled Tire as Reinforcement in Hot Mix Asphalt URL: http disposed of in landfills or incinerated. Two types of recycled tire fibers were evaluated to determine

  19. ROOFING PROJECT ODORS How Can EHS Help?

    E-Print Network [OSTI]

    Stephens, Graeme L.

    ROOFING PROJECT ODORS How Can EHS Help? We can work with occupants to act as a liaison with Facili- ties Management and the contractor to identify ways to reduce odors. Contact us at 491­ 6745. Roof work is a necessary part of building preservation. Roofing odors are generated during these projects when hot asphalt

  20. Greenland Meadows LID Case Study: Economics

    E-Print Network [OSTI]

    Greenland Meadows LID Case Study: Economics Utilizing an LID approach that featured porous asphalt and a gravel wetland, a cost-competitive drainage system was designed for a large retail development. Greenland in Greenland, N.H. The development is located on a 56-acre parcel and includes three, one-story retail

  1. USE OF DISTRIBUTED FIBER OPTIC SENSORS TO DETECT DAMAGE IN A Xavier Chapeleau

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    USE OF DISTRIBUTED FIBER OPTIC SENSORS TO DETECT DAMAGE IN A PAVEMENT Xavier Chapeleau 1 , Juliette strains and crack initiation. These first tests demonstrate that distributed fiber optic sensor based, by monitoring strain profiles in the bituminous layers. KEYWORDS: Distributed fiber optic sensor, asphalt

  2. Characterization and potential utilization of Whiterocks (Utah) tar sand bitumen

    SciTech Connect (OSTI)

    Tsai, C.H.; Deo, M.D.; Hanson, F.V.; Oblad, A.G. (Lab. of Coal Science, Synthetic Fuels and Catalysis, Dept. of Fuels Engineering, Univ. of Utah, Salt Lake City, UT (US))

    1991-01-01T23:59:59.000Z

    This paper reports on the native Whiterocks (Utah) tar sand bitumen that was separated into several boiling range fractions for detailed analysis and characterization. The lighter fraction (477-617 K) was evaluated for use as a transportation fuel and the residues ({gt}617 K and {gt}728 K) were evaluated for use as road asphalts. The 617 K plus residue from the Whiterocks bitumen can be classified as a viscosity grade AC-10 asphalt whereas the 728 K plus residue failed to meet asphalt specifications. Apart from the asphalt specification tests, several sophisticated techniques were used to characterize these fractions. The detailed structure of the low molecular weight portions of Whiterocks bitumen (477-617 K and 617-728 K) was determined by combined GC-MS. Several physical properties were also measured to evaluate the potential of the 477-617 K fraction as a high density/energy aviation turbine fuel. This lower molecular weight fraction of the bitumen contained predominantly naphthenic hydrocarbons and lesser concentrations of aromatic hydrocarbons. This was confirmed by the FTIR spectra and by the GC-MS analyses. As a result, the 477-617 K fraction appeared to be an excellent candidate as a feedstock for the production of high density, aviation turbine fuels following mild hydrotreating.

  3. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 47, NO. 5, MAY 1999 851 Low Grazing Incidence Millimeter-Wave Scattering

    E-Print Network [OSTI]

    Sarabandi, Kamal

    analytically. The University of Michigan 94-GHz polarimetric radar system was used to perform polarimetric- neering and Computer Science, The University of Michigan, Ann Arbor, MI 48109 USA. Publisher Item are characterized experimentally. Ice and water over asphalt and concrete surfaces are modeled by homoge- neous

  4. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 11, NOVEMBER 1997 1679 Modeling and Measurements of Scattering from

    E-Print Network [OSTI]

    Sarabandi, Kamal

    . The University of Michigan polarimetric 94-GHz radar system was deployed for characterizing the polarimetric and Computer Science, The University of Michigan, Ann Arbor, MI 48109 USA. Publisher Item Identifier S 0018 with asphalt road surfaces, possibly covered with ice or water, at millimeter-wave frequencies is studied

  5. Collision and Extension in Buton, Sulawesi, Indonesia Supervisors: Robert Hall & Lloyd White

    E-Print Network [OSTI]

    Royal Holloway, University of London

    are overlain by deep water Neogene sediments, and there are asphalt deposits and oil and gas seeps probably://searg.rhul.ac.uk). References Davidson, J.W., 1991. The geology and prospectivity of Buton Island, Southeast Sulawesi, Indonesia.B., Silver, E.A., 1991. Geology of a Miocene collision complex, Buton, eastern Indonesia. Geological Society

  6. Conservation of Heat Energy at Hot Petroleum Products Terminals

    E-Print Network [OSTI]

    Powell, J. C.; Graham, R. M.

    1981-01-01T23:59:59.000Z

    Exxon operates several terminals which store asphalt and heavy fuel oil. Due to the rising cost of fuels, Exxon initiated a study to identify economic investments which would reduce the fuel needed to heat these products. First, fuel usage at four...

  7. Multiscale Modeling and Simulation of Fluid Flows in Inelastic Media

    E-Print Network [OSTI]

    Popov, Peter

    in porous media (e.g. soil), Elasticity equations in heterogeneous media (concrete, asphalt), etc porous media s The Fluid-Structure interaction (FSI) problem at the microscale and numerical methods with computational solutions s Numerical upscaling of flow in deformable porous media #12;- p. 3/42 Why homogenize

  8. Katherine Rowe September 29, 2006

    E-Print Network [OSTI]

    Rosemond, Amy Daum

    pavements, namely porous asphalt, porous concrete, and numerous modular paver systems. Both a construction particles allows water to drain through quickly. Porous concrete also consists of an open-graded coarseKatherine Rowe ECOL 8710 September 29, 2006 Short Memo: Aspects & Impacts of Porous Pavements

  9. National Concrete Pavement Technology Center

    E-Print Network [OSTI]

    .5 " concrete overlay with 1" asphalt interlayer (non porous surface mix) ·Pours- one 22' pass and one 16' ftNational Concrete Pavement Technology Center Concrete Overlay Technology TTCC/NC2 Meeting Savannah patches in 2008 Shortcut (2) to CD Drive.lnk #12;Need to Move Concrete Overlays Forward Concrete Overlay

  10. 1 INTRODUCTION AND MOTIVATION The Indirect Tension Test is frequently used in the

    E-Print Network [OSTI]

    Paulino, Glaucio H.

    Highway Research Program (SHRP), in the mid-1990's, a test protocol was developed for evaluating creep on the same sample, with the non-destructive creep test run before the destructive strength test Tension Test (IDT) is frequently used for evaluation of asphalt material viscoelas- tic creep properties

  11. Automated speed enforcement study finds public support in Minnesota

    E-Print Network [OSTI]

    Minnesota, University of

    -temperature cracking than current methods that examine creep and strength properties. After using the DCT test professor Mihai Marasteanu has been working to develop new testing methods and specification criteria, the research team developed a new test for asphalt mixtures based on fracture mechanics principles. The test

  12. Heat island mitigation benefits from the collaboration between researchers and stakeholders, interdisciplinary methods, and neighborhood-scale strategies that account for

    E-Print Network [OSTI]

    York (NYC), the heat island impacts interact with aging energy and water infrastructure heat cooling and increase the amount of energy that is absorbed and stored in the city; ii) low-albedo surfaces, such as dark rooftops and asphalt roadways; iii) reduced skyview from within urban canyons, which

  13. CX-012380: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Establishment of a MOX Laydown Yard in an Existing Asphalt Parking Lot South of Building 782-3A CX(s) Applied: B1.15 Date: 05/22/2014 Location(s): South Carolina Offices(s): Savannah River Operations Office

  14. Short Elliott Hendrickson Inc., 3535 Vadnais Center Drive, St. Paul, MN 55110-5196 SEH is an equal opportunity employer | www.sehinc.com | 651.490.2000 | 800.325.2055 | 651.490.2150 fax

    E-Print Network [OSTI]

    Netoff, Theoden

    , 2009 UMore Air Quality Impact Study Projected Air Quality Impacts from Concrete and Asphalt Plants an Air Quality Impact Study to assess the air quality impacts associated with the project. The Air for the project and identified issues and alternatives to be examined in depth in the EIS. Air quality impacts

  15. An innovative nanosensor for weigh-in-motion applications B. Ghaddab1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , such as difficult deployment, high cost and short lifetime. A very promising route toward low-cost, large surface on a thin piezoresistive layer of carbon-clay nanoparticles deposited within asphalt, promise for very low-cost fabrication process and study its sensitivity to a compressive force. Keywords: Weigh-in-motion, sensor

  16. Development of methods to quantify bitumen-aggregate adhesion and loss of adhesion due to water

    E-Print Network [OSTI]

    Bhasin, Amit

    2007-09-17T23:59:59.000Z

    in wet and dry conditions plays an important role on the moisture sensitivity of the asphalt mix. A part of this research work was to develop the Wilhelmy plate method and the Universal Sorption Device to measure the surface free energy components...

  17. Nutrient Removal Mechanisms in a Cold Climate Gravel Wetland

    E-Print Network [OSTI]

    Nutrient Removal Mechanisms in a Cold Climate Gravel Wetland Alison Watts, Robert Roseen, Kim Farah and development of stormwater treatment systems Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 603.862.4024 http://www.unhsc.unh.edu #12;POROUS ASPHALT Watershed Boundary #12;#12;Gravel Wetland Effluent sampling

  18. Comparison of Maintenance Cost, Labor Demands, and System Performance for LID and Conventional

    E-Print Network [OSTI]

    operations and maintenance. Due to increasing require- ments for more effective treatment of runoff for porous asphalt, a vegetated swale, bioretention, and a subsurface gravel wetland, to $11­$21=kg=year TSS and personnel hours) and higher water quality treatment capabilities as a function of pollutant removal

  19. An evaluation of the potential end uses of a Utah tar sand bitumen. [Tar sand distillate

    SciTech Connect (OSTI)

    Thomas, K.P.; Harnsberger, P.M.; Guffey, F.D.

    1986-09-01T23:59:59.000Z

    To date the commercial application of tar sand deposits in the United States has been limited to their use as paving materials for county roads, parking lots, and driveways because the material, as obtained from the quarries, does not meet federal highway specifications. The bitumen in these deposits has also been the subject of upgrading and refining studies to produce transportation fuels, but the results have not been encouraging from an economic standpoint. The conversion of tar sand bitumen to transportation fuels cannot compete with crude oil refining. The purposes of this study were two-fold. The first was to produce vacuum distillation residues and determine if their properties met ASTM asphalt specifications. The second was to determine if the distillates could serve as potential feedstocks for the production of aviation turbine fuels. The bitumen used for this study was the oil produced during an in situ steamflood project at the Northwest Asphalt Ridge (Utah) tar sand deposit. Two distillation residues were produced, one at +316/sup 0/C and one at +399/sup 0/C. However, only the lower boiling residue met ASTM specifications, in this case as an AC-30 asphalt. The original oil sample met specifications as an AC-5 asphalt. These residue samples showed some unique properties in the area of aging; however, these properties need to be investigated further to determine the implications. It was also suggested that the low aging indexes and high flow properties of the asphalts may be beneficial for pavements that require good low-temperature performance. Two distillate samples were produced, one at IBP-316/sup 0/C and one at IBP-399/sup 0/C. The chemical and physical properties of these samples were determined, and it was concluded that both samples appear to be potential feedstocks for the production of aviation turbine fuels. However, hydrogenation studies need to be conducted and the properties of the finished fuels determined to verify the prediction. 14 refs., 12 tabs.

  20. Pipe inspection using the pipe crawler. Innovative technology summary report

    SciTech Connect (OSTI)

    NONE

    1999-05-01T23:59:59.000Z

    The US Department of Energy (DOE) continually seeks safer and more cost-effective remediation technologies for use in the decontamination and decommissioning (D and D) of nuclear facilities. In several of the buildings at the Fernald Site, there is piping that was used to transport process materials. As the demolition of these buildings occur, disposal of this piping has become a costly issue. Currently, all process piping is cut into ten-foot or less sections, the ends of the piping are wrapped and taped to prevent the release of any potential contaminants into the air, and the piping is placed in roll off boxes for eventual repackaging and shipment to the Nevada Test Site (NTS) for disposal. Alternatives that allow for the onsite disposal of process piping are greatly desired due to the potential for dramatic savings in current offsite disposal costs. No means is currently employed to allow for the adequate inspection of the interior of piping, and consequently, process piping has been assumed to be internally contaminated and thus routinely disposed of at NTS. The BTX-II system incorporates a high-resolution micro color camera with lightheads, cabling, a monitor, and a video recorder. The complete probe is capable of inspecting pipes with an internal diameter (ID) as small as 1.4 inches. By using readily interchangeable lightheads, the same system is capable of inspecting piping up to 24 inches in ID. The original development of the BTX system was for inspection of boiler tubes and small diameter pipes for build-up, pitting, and corrosion. However, the system is well suited for inspecting the interior of most types of piping and other small, confined areas. The report describes the technology, its performance, uses, cost, regulatory and policy issues, and lessons learned.