Application of WMA on Thin Overlay on Airport Cement Concrete Pavement

Abstract

Considering the hot mix asphalt compaction quality is difficult to reach and it can be destroyed easily, the warm mix asphalt is used for thin overlay of airport cement concrete pavement. The mixture proportion of warm mix asphalt was designed, the performance of the base asphalt and the modified emulsify asphalt were measured, and the optimum asphalt quantity was determined, then the performance comparison between warm mix asphalt and hot mix asphalt were analyzed. Results indicate that warm mix asphalt has the same performance with hot mix asphalt, it can also satisfy the requirement of the airport cement concrete pavement thin overlay. Finally, in order to validate the project application effect, the warm mix asphalt was used in a northwest airport cement concrete pavement thin overlay. After four years use, the construction of the pavement is in good condition, and no disease emerging, the performance can meet the using requirements of the airport.