University of California Pavement Research Center

This report is the third in a series that describes the results of accelerated pavement testing conducted on full-scale pavements at the Richmond Field Station (RFS). The report contains a summary of the results and associated analyses of a pavement section composed of three lifts of asphalt concrete and an untreated aggregate base layer on top of a prepared subgrade. The pavement section is termed an undrained pavement because it does not include an ATPB layer between the asphalt concrete layers and the untreated aggregate base. The pavement structure was designated Section 545. The tests on this test section have been performed as part of the Goal 5 Accelerated Test Program for the evaluation of drained and undrained pavements under conditions of water infiltration. The main objective of the test program is to develop data to quantitatively compare and evaluate the performance of reduced thickness asphalt rubber hot mix (ARHM) and full thickness of dense graded asphalt concrete (DGAC) mix on wearing courses for pavement structures with wet base conditions.

Other objectives are:

- To quantify elastic moduli of the pavement layers;

-To quantify the stress dependence of the pavement layers;

- To determine the mechanics of failure of the pavement structure;

- To evaluate the effectiveness of non-destructive and partially destructive methods for assessing pavement structural condition.