Crack router machine can be used for repair the crack on the asphalt pavement. Asphalt pavement is the most common pavement structure in China. Due to the difference of asphalt concrete material and the influence of design and construction level, asphalt pavement often has eight common diseases such as cracks, rutting, loosening, frost heaving, subsidence, overcooling, . The emergence of these diseases seriously affected the driving speed, traffic safety, increased vehicle wear and tear, shortening the life of asphalt pavement.
Cracks, as one of the common disease, it can be repaired by crack router machine together with the crack sealing machine. Asphalt pavement in the early stages, will inevitably produce various forms of cracks. Early cracks will not affect the use of asphalt pavement performance, but with the invasion of rain and the role of external forces, will gradually produce structural damage to asphalt pavement. Cracks from the manifestations are divided into horizontal cracks, longitudinal cracks and mesh cracks three.
The causes about crack router machines are as follows: 1. transverse cracks, often due to the role of temperature stress, pavement fatigue cracks. This kind of temperature crack often starts from the surface with the highest rate of temperature change and extends down quickly, and the aging of the asphalt occurs with time. The crack resistance of the asphalt surface decreases year by year and the temperature crack increases. 2. longitudinal cracks, mainly due to uneven foundation and fill, especially in the widening of the old roadbed, because the soil step treatment is not standardized, layered filling thickness and compaction degree of lax control. 3, the network cracks, mostly due to the early surface cracks through the surface water infiltration, erosion, pump slurry, resulting in a seam as the center of the subsidence deformation, while generating new cracks and even broken damage.
