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Archives
The treatment measures of pavement cracks
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Repair of transverse, longitudinal and reflective cracks
⑴ When the seam width is less than 2mm, it can not be processed.
The seam width of 2-5mm available modified emulsified asphalt seam, greater than 5mm available modified asphalt (such as SBS modified asphalt) seam. Before filling the seam, it is necessary to remove the broken garbage and garbage in the seam and the edge, and keep the seam dry. After filling the seam, the surface is sprinkled with coarse sand or 3-5mm stone debris. Clink this link https://lutonmachinery.com/mobile-hot-mix-plant/
Repair of network cracks
(1) If there is a weak layer or unstable structure layer, it should be eradicated; If the network cracks due to water in the structure layer, after removing the surface layer, it is necessary to set up drainage facilities to remove the seepage water from the road surface to the road. And then we lay out the new mix.
(2) If the strength meets the requirements, the mesh crack from the asphalt surface thickness is insufficient, can be used to milling mesh crack surface layer after adding new material to deal with. The overlay thickness is calculated according to the current design specification; Such as the road cover, in order to reduce the reflection crack, can take a variety of "anti" measures to deal with.
(3) Due to the instability of the roadbed, the pavement network crack, can use lime or cement treatment roadbed, or grouting reinforcement treatment, depth can be determined according to the specific situation, generally 20-40cm. Dosage of slaked lime 5%-10%, or cement 4%-6%. After the treatment of the soil subgrade is stable, the base and surface layer are redone.
(4) Due to the base weak or insufficient thickness caused by pavement network crack, according to the situation, respectively take thickening, replacement or comprehensive stability measures to strengthen. Semi-rigid materials with good water stability and little shrinkage are preferred. After the base is strengthened, the asphalt surface is paved.