Asphalt concrete has rheological properties at high temperature. Especially, asphalt pavement is soft and sticky in summer. Under the action of vehicle load, depression occurs in the stressed area. After removing the vehicle load, the asphalt pavement cannot completely restore to the condition. That is, plastic deformation occurs. Under the repeated rolling of vehicles, plastic deformation accumulates and ruts are formed.
After analyzing the structure of asphalt pavement. We can know that asphalt concrete has rheological properties at high temperature. When subjected to load, there is no mechanism that can restrain aggregate movement in asphalt concrete. Therefore, this will cause the asphalt surface layer to move. This is the main reason for rutting.
Fiberglass geogrid is used in asphalt overlay, which plays a skeleton role in asphalt overlay. Use fiberglass geogrid in asphalt overlay, which plays a skeleton role in asphalt overlay. The aggregate in asphalt concrete runs through the grille to form a composite mechanical interlocking system. In this way, It can limit the movement of aggregates. And it can increase the transverse restraint force in the asphalt overlay. Each part of the asphalt surface layer restricts each other, which effectively prevents the asphalt surface layer from moving. So it can resist rutting.