Study on the Causes of Highway Pavement Cracks in Desert Environment

According to relevant statistics, more than 90% of domestic high-grade asphalt pavement is semi-rigid base pavement, and cracking a congenital stubborn disease common. In Tengger Desert section Wuma expressway, the temperature difference large, shrinkage dry difficult avoid, resulting in decline structure strength. Once cracked, equivalent flexible structure; residual fatigue strength greatly reduced; long-term service performance can not be guaranteed; durability poor, damage layer deep; repair cycle long; maintenance costs are relatively high. This paper analyzes causes cracks harsh environment hinterland Desert, studies its mechanism treatment scheme.