In-depth study of cold in-place recycled-pavement performance. Volume 1. Final report. Rept. for Dec 88-Oct 90
Oregon has developed a mix design procedure for cold in-place recycled (CIR) asphalt concrete pavements. The procedure involves estimation of an initial emulsion content based on gradation of recycled asphalt pavement (RAP), asphalt content of RAP, and penetration and viscosity of recovered asphalt. When an estimated emulsion content is determined, Marshall-sized specimens are prepared for a range of emulsion contents with the range centered on the estimated emulsion content. Hveem and Marshall stability, resilient modulus, and index of retained modulus (IRM) tests are performed on the specimens and a design emulsion content is selected based upon these results. Because of variations in RAP properties, continual need for field adjustments, and the difficulty of interpreting mix property test results, only the estimation part of the procedure is currently implemented. The paper describes the mix design procedure and presents lab results demonstrating the difficulty of choosing emulsion content based on Hveem and Marshall stability, resilient modulus and IRM. Data comparing design emulsion content with actual emulsion contents used in the field are presented. Selection of water content is discussed. Test results of mix properties monitored over time are presented, demonstrating the curing of the emulsion. Performance data for CIR pavements constructed from 1984 through 1988 are presented as well as initial results of an attempt to use lime during recycling to correct a stripped pavement. A construction and inspection manual is presented as a separate document.
- Research Organization:
- Oregon State Univ., Corvallis, OR (United States). Dept. of Civil Engineering
- OSTI ID:
- 5414435
- Report Number(s):
- PB-91-201434/XAB; TRR--90-23
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320604* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
ASPHALTS
BITUMENS
BUILDING MATERIALS
COLLOIDS
CONCRETES
CURING
DESIGN
DEVELOPED COUNTRIES
DISPERSIONS
DOCUMENT TYPES
EMULSIONS
FEDERAL REGION X
FIELD TESTS
MANUALS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MIXTURES
MOISTURE
NORTH AMERICA
OREGON
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PAVEMENTS
PERFORMANCE
QUANTITY RATIO
RECYCLING
STABILITY
TAR
TESTING
USA
VISCOSITY