Performance of Rehabilitated Lightweight Aggregate Asphalt Concrete Pavements under Wet and Heated Model Mobile Load Simulator Trafficking: A Comparative Study with the TxMLS.

摘要

One-third-scale Model Mobile Load Simulator Mk3 (MMLS3) tests were conducted on US 281 in Jacksboro, Texas, adjacent to the full-scale Texas Mobile Load Simulator (TxMLS). The prime objectives were to investigate the moisture susceptibility and relative performance of the recently constructed Dustrol and Remixer rehabilitation surface layers and to compare rutting caused by the MMLS3 to rutting caused by the TxMLS. Nondestructive stiffness measurements with the portable seismic pavement analyzer (PSPA) and seismic analysis of surface waves (SASW) devices were also performed intermittently during MMLS3 testing to monitor changes in the in-situ asphalt concrete (AC) pavement modulus. A variety of laboratory tests-volumetrics, moisture sensitivity, shear, indirect tensile strength (ITS) and fatigue, and semicircular bending (SCB)-were also performed to supplement the field performance results.