1, the amount of cement ash is not enough, or the quality of cement itself has quality problems, resulting in insufficient cohesive force;

2, mixture segregation, the surface is sand, no strength;

3. The water content during construction is too small, resulting in insufficient rolling and low degree of compaction;

4, health care is not in place, one is that the water is not enough, and the other is that the vehicle passes before it is mature, resulting in loose roads.

If it is only the surface layer, nothing else will, and the impact will not be too great. Rapidly spraying asphalt or cement concrete pavement.