This technical memorandum provides guidelines for accessing the data stored in the University of California Pavement Research Center’s Moisture Sensitivity database. The memo also documents the structure of the database developed during the Partnered Pavement Research Center study, “Investigation of Conditions for Moisture Damage in Asphalt Concrete and Appropriate Laboratory Test Methods.” The database presented does not allow addition of new data, although it can be upgraded to include this function if Caltrans considers collecting similar information in the future.

Document summarizes a procedure to establish pay factors for asphalt concrete pavement construction using performance models for fatigue and rutting based on the analysis of accelerated pavement tests from the Caltrans Heavy Vehicle Simulator (HVS) and the WesTrack accelerated pavement performance test program. Results of the performance-based approach are compared with pay factors determined by the current Caltrans procedure using percent defective and experience-based weighting factors.