When the cement pipe is put into practical use, if it shows cracks, it will cause great distress to the project to be constructed. People who know about cement pipes may have a certain understanding. Others will ask, why do cement pipes show cracks? Is it a problem of poor quality? Let's unravel the mystery for everyone today.
The reason for the appearance of cracks on the general appearance of cement pipe concrete is that the cracks on the concrete surface are mostly caused by shortening, which can be divided into two major categories: one is that the surface moisture of the concrete that has just been poured is evaporated and dried; Often the outside temperature is high and the relative humidity in the air is small, so its surface will be transpirational and dry, but its interior is still a plastic body, which causes cracks to occur.
The other type is caused by the temperature difference between the surface and the surface of the concrete caused by the heat of hydration during the hardening of the concrete. For the deeper concrete, during the pouring of the upper concrete, it will continuously settle due to its own weight. Then, when the concrete is initially set but not finally set, it is subject to the reinforcement or the joint bolts of the formwork, and this settlement will be blocked and cracks will occur. Once the cement pipe is really cracked, the common remedy will be to coat the cement slurry or low viscosity polymer to prevent water intrusion. If the cracks are deep or wide, pressure grouting is used to repair them.