The treatment of roadbed waterproof construction subgrade is one of the important factors that directly affect the quality of the waterproof layer of the roadway and the quality of the asphalt pavement above the waterproof layer. In recent years, it has been increasingly researched and designed by emphasis on construction,  management and maintenance. Today we introduce the most advanced shot blasting process.

Shot blasting refers to the mechanical method of projecting steel shots onto the surface to be treated at a high speed and a certain angle to achieve the effect of cleaning the treated surface. The road shot blasting machine can obtain different projectile strength by controlling the flow rate of the steel shot, the walking speed, and selecting the size and shape of the steel shot, and finally obtaining different surface treatment depths and effects.

1) The slurry and sand layer of the cement concrete surface can be removed;

2) It can open the pores and fine cracks on the concrete surface, which is beneficial to the waterproof sealant or waterproof layer to penetrate into the concrete;

3) Can expose concrete defects;

4) It is easy to control the depth and roughness of the treated surface to obtain a rough and uniform surface;

5) It can be used for surface treatment of cement concrete roadway subgrade, and can also be used for surface treatment of steel box roadway subgrade (paint removal and rust removal);

6) There is no dust during the construction process, and environmental protection construction is realized.

In recent years, especially in the past three years, the road shot blasting machine has become the most widely used method for the treatment of the roadway waterproof road surface. Especially before the steel box bridge asphalt pavement, the surface treatment in the anticorrosion construction of the steel structure The shot blasting process is almost unique.