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Title: Characterization of Slag, Fly Ash and Portland Cement for Saltstone

Abstract

Batch-to-batch variability in the chemical and physical properties of the fly ash, slag and portland cement (binders) will be an ongoing concern over the many years that salt waste from Tank 50 will be processed into grout at the Saltstone Processing Facility. This batch-to-batch variability in the properties of the binder materials translates to variability in the fresh and cured properties of Saltstone. Therefore, it is important to quantify the batch-to-batch variability of the binder materials and the resultant variation in grout properties. This report is the starting point for that process by providing the baseline (reference point) binder properties to which future batches of binder materials can be compared. For this characterization effort, properties of fly ash, slag and portland cement were obtained and documented in this report. These properties included particle size distribution by laser light scattering and dry sieving, particle size and morphology by scanning electron microscopy, true, aerated and tapped densities, chemical composition, rheological properties of the water based slurries made from individual binder material, and volatility through thermogravimetric analysis and differential thermal analysis. The properties presented in this report also provide a baseline data set to assist in problem solving efforts when or if unanticipatedmore » and/or unwanted processing events occur at the Saltstone Processing Facility.« less

Authors:
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
890223
Report Number(s):
WSRC-TR-2006-00067resub
TRN: US0604629
DOE Contract Number:
DE-AC09-96SR1850
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 36 MATERIALS SCIENCE; RADIOACTIVE WASTE FACILITIES; RAW MATERIALS; CHEMICAL PROPERTIES; PHYSICAL PROPERTIES; VARIATIONS; FLY ASH; SLAGS; PORTLAND CEMENT; SLURRIES; MATERIALS TESTING

Citation Formats

Harbour, J. Characterization of Slag, Fly Ash and Portland Cement for Saltstone. United States: N. p., 2006. Web. doi:10.2172/890223.
Harbour, J. Characterization of Slag, Fly Ash and Portland Cement for Saltstone. United States. doi:10.2172/890223.
Harbour, J. Wed . "Characterization of Slag, Fly Ash and Portland Cement for Saltstone". United States. doi:10.2172/890223. https://www.osti.gov/servlets/purl/890223.
@article{osti_890223,
title = {Characterization of Slag, Fly Ash and Portland Cement for Saltstone},
author = {Harbour, J},
abstractNote = {Batch-to-batch variability in the chemical and physical properties of the fly ash, slag and portland cement (binders) will be an ongoing concern over the many years that salt waste from Tank 50 will be processed into grout at the Saltstone Processing Facility. This batch-to-batch variability in the properties of the binder materials translates to variability in the fresh and cured properties of Saltstone. Therefore, it is important to quantify the batch-to-batch variability of the binder materials and the resultant variation in grout properties. This report is the starting point for that process by providing the baseline (reference point) binder properties to which future batches of binder materials can be compared. For this characterization effort, properties of fly ash, slag and portland cement were obtained and documented in this report. These properties included particle size distribution by laser light scattering and dry sieving, particle size and morphology by scanning electron microscopy, true, aerated and tapped densities, chemical composition, rheological properties of the water based slurries made from individual binder material, and volatility through thermogravimetric analysis and differential thermal analysis. The properties presented in this report also provide a baseline data set to assist in problem solving efforts when or if unanticipated and/or unwanted processing events occur at the Saltstone Processing Facility.},
doi = {10.2172/890223},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2006},
month = {Wed Feb 01 00:00:00 EST 2006}
}

Technical Report:

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  • A laboratory test program was undertaken to determine the effects of utilization of lignite fly ash as a substitute for various percentages of the Portland cement in concrete. Compressive and flexural strength properties were determined. The air-voids systems were examined and rapid freeze-thaw durability and resistance to deicer scaling tests performed. Reduction in mortar bar expansion and methods of determining available alkalies were also investigated. The results of the investigation indicate lignite fly ash can be used as a partial replacement for Portland cement in concrete to produce strong, durable concrete. (GRA)
  • A new kind of cement made of clinker, steel slag, fly ash, and certain admixtures has been developed. The total amount of steel slag and fly ash is 50%, and the grade of cement reaches 425 or even 525 according to Chinese national standard for composite Portland cement. The optimum formulation of such cement was studied. Besides setting time and strength, the drying shrinkage, sulfate resistance, carbonation, and restriction of expansion due to alkali-aggregate reaction were also determined.
  • The objectives of this study were to develop and analyze information to facilitate decision making in regard to by-products from the Commercial Plant. Part 1 of the study investigated the alternative marketing and commercial advantages of producing elemental sulfur or sulfuric acid, the findings to be used with results of a technical and economic analysis to determine the relative desirability of choosing either as a by-product. The principal commercial and marketing input for this portion of the study were provided by review of authoritative published material and by personnel interviews with government, trade association and commercial information sources, including amore » limited number of major consumers and producers. Compilation and analysis of statistical data and knowledgeable opinions on the following were included: production and consumption trends and future outlook; levels of current and expected future prices; end-use trends and outlook for new uses; geographic consumption patterns; export market and outlook for foreign sales; and other factors related to the present and future supply and demand and effective marketing of the by-products. Technical data were obtained from the commercial suppliers of the processes involved, supplemented by information from producers of the by-products under consideration. The predicted composition and quantity of all gaseous waste streams were used for investigation of by-product potential. Capital investment and operating costs to produce the saleable by-products investigated were developed for each production alternative considered. Operating profits were determined and comparative figures were calculated for net cash flow and return on investment.« less
  • Waste fly ash is produced by several coal-fired power generating plants in and adjacent to Arizona. A literature search, laboratory test program and analysis of test data indicate that available fly ashes can be advantageously used as admixtures in portland cement concrete for highway construction. Compressive strength, flexural strength, resistance to sulfate attack and freeze-thaw durability are included in the laboratory test series. Test data are used in the development of a mix design procedure aimed at optimizing the proportions of fly ash and portland cement.