What is the reason why the sand falls on the wall? Is there a way to solve it?

One of the most worrying problems in plastering engineering is the problem of sand prevention and removal on the wall. Sometimes the whole wall has sand prevention phenomenon, and sometimes it is only a local sand prevention and deslagging problem. This kind of problem seems to be caused by insufficient labels, but it is often not that simple. . .

There are generally several reasons for the wall surface to turn over sand: first, the amount of cement is unreasonable or the cement is out of date, resulting in insufficient label; Second, uneven mixing; Third, the proportion of cement sand is incorrect; Fourth, the silt content in sand is too high; Fifth, weather factors; Sixth, additives are used too much. . . Wait a minute.

For local sand control, most of them are caused by uneven mixing, and a few are caused by sand containing impurities. If the whole wall is sand-proof, it may be because the ratio is unreasonable, the mortar is not placed on the wall at the right time, or the sand contains too much mud. When these problems are found, if the redone mortar is shoveled off, the cost will be too great, and some of them are not very serious (even one east and one west). Although it is not serious, it may still lead to acceptance failure. Or later, the putty powder was empty and delaminated, and some friends even coated it with glue interface agent, which not only failed to achieve the goal, but also led to the later use of sand control spirit, which was not worth the candle. So, how to fix it is more reliable?

Chongqing shaba building materials co., ltd

A better way to solve the problem of sand formation and loss of cement mortar wall is to directly spray sand control spirit, repair and change the strength of mortar and improve the label of cement mortar. As long as there is no cement content at all, the problem of sand removal can be basically solved.

? Of course, the sand control spirit is used to control the sand falling from the wall, strengthen the hardness of mortar and improve the label of sand-mixed wall (change the physical properties), not glue. If home improvement or later need putty, it is necessary to increase the adhesion of the putty layer. After sand control, a layer of glue interface agent can be brushed on the wall surface to increase the adhesion, so that the putty powder can be more firmly bonded to the wall base.

However, we should pay special attention to that if we want to use products such as interface agent, such as wall cement, we must make repairs after using sand-fixing agent. If we first use interface agents, such as wall cement, the wall will not be able to absorb the infiltration of sand-fixing materials, thus failing to achieve the expected results.

Shazhiling's renovation and mending of the wall rubbing layer and changing the hardness density of the wall mortar are not only suitable for the wall rubbing with desliming and sand prevention cement, the renovation of old walls, but also can be used for the wall that does not shed sand, so as to prevent and delay the aging and pulverization of the wall and reduce the risk of hollowing and delamination of the putty layer.