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 pre-publication draft of 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 2_Previous Research Conducted Under the Original NCHRP 09-54 Project||13-22|
|Chapter 3_Refinement of the Climate-Based Predefined Laboratory Aging Durations||23-39|
|Chapter 4_Refinement of the Pavement Aging Model (PAM)||40-71|
|Chapter 5_Development of Procedures to Estimate the PAM Inputs Using Standard Binder Aging Methods and PG||72-90|
|Chapter 6_Development of a Framework to Predict Changes in Asphalt Mixture Performance Due to Oxidative Aging||91-137|
|Chapter 7_Conclusions and Suggested Research||138-141|
|Appendix_Proposed Standard Method of Test for Long-Term Conditioning of Hot Mix Asphalt (HMA) for Performance Testing||142-153|
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