Cracks of asphalt pavement is one of the common diseases in express highway, according to the causes, it can be divided into load-type cracks and non-load-type cracks in 2 categories. Load-type cracks is mainly due to ill-designed or road construction reasons, the structural layer is not strength enough, fracture strength can not meet the increasing traffic volume and axle loads generated. Non-load-type cracks mainly in two forms, one is reflected in the base cracking pavement crack formation, another is low-temperature asphalt pavement crack itself.
Depending on the asphalt pavement crack manifestations can be divided into transverse cracks, longitudinal cracks, cracks and crack networks, etc., which are divided into light, medium and heavy three cases based on the edge of the slit width and extent of the damage.
