Research on the Moisture Damage Occurred on the Asphalt Pavement

Abstract

Water is an important reason lead to the moisture damage on the asphalt pavements. In the paper, investigations and tests indicate that the poor permeability of the asphalt layer when the road opening to the traffic is a very common defect nowadays. The permeability would decrease under the hydraulic and air pressure resulted by moving vehicles, the water would directly penetrate the asphalt layer and accumulate at the interface betweens different layers. The precipitation water could also enter the pavement through the cracks and central separation belt, and accumulate as well, which lead to the development of moisture damage occurred at the bottom and upward subsequently. The intrude water also causes moisture failures in the base as well as the asphalt layer.