The accurate characterization of the in situ aging of asphalt pavement materials over the service life of the pavement is of utmost importance to the implementation of mechanistic empirical (ME) pavement design and analysis methods.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 973: Long-Term Aging of Asphalt Mixtures for Performance Testing and Prediction: Phase III Results refines the aging procedure developed in the original NCHRP Research Report 871: Long-Term Aging of Asphalt Mixtures for Performance Testing and Prediction. The updates field calibrate the original project aging model (PAM), develop procedures to estimate the PAM inputs, and develop a framework by which the predicted changes in asphalt binder properties that are due to oxidative aging can be related to corresponding changes in asphalt mixture performance.
Table of Contents
|Chapter 1 - Introduction||1-4|
|Chapter 2 - Previous Research Conducted Under the Original NCHRP Project 09-54||5-13|
|Chapter 3 - Refinement of the Climate-Based, Predefined Laboratory Aging Durations||14-28|
|Chapter 4 - Refinement of the Pavement Aging Model (PAM)||29-59|
|Chapter 5 - Development of Procedures to Estimate the PAM Inputs Using Standard Binder Aging Methods and PG||60-76|
|Chapter 6 - Development of a Framework to Predict Changes in Asphalt Mixture Performance Due to Oxidative Aging||77-119|
|Chapter 7 - Conclusions and Suggested Research||120-123|
|Appendix A - Investigation into the Effects of Asphalt Mixture Morphology on Pavement Aging||127-133|
|Appendix B - Estimation of the Material-Specific Parameters of RAP-Containing Mixtures Given Individual Virgin and RAP Parameters||134-139|
|Appendix C - Prediction of Mixture Properties Through the Rate of Change of Model Coefficients||140-169|
|References for Appendices A, B, and C||170-170|
|Attachment - Proposed Standard Method of Test for Long-Term Conditioning of Hot Mix Asphalt (HMA) for Performance Testing||171-184|
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