Laboratory Performance Evaluation of Warm Mix Asphalt containing High Percentages of RAP

摘要

This paper evaluated the rutting resistance, moisture susceptibility and fatigue resistanceof warm-mix asphalt (WMA) mixtures containing high percentages of reclaimed asphaltpavement (RAP) through laboratory performance tests. The WMA mixtures were plantproduced with a commonly-used foaming technology in the U.S. RAP content rangedfrom 0 up to 50%. Laboratory performance tests included asphalt pavement analyzer(APA) rutting test, Hamburg wheel tracking test, tensile strength ratio (TSR) test,Superpave indirect tension (IDT) tests and beam fatigue test. For comparison purposes,HMA mixtures containing 0% and 30% RAP were also evaluated and compared to WMA.The laboratory test results indicated that WMA with high percentage of RAP exhibitedhigher rut resistance, better moisture damage resistance, and better fatigue performance.