Dusting the surface of the ash layer sanding, powdering, to solve this problem is the key

Gypsum plaster layer surface sand, drop powder
some small things related to big security
this problem is the key
Sanding, powdering of the wall, not only affect the aesthetic, but also if you want to tile on the wall, a long time, sand, ash caused by the wall adhesion is insufficient, it is easy to cause the tile of the empty drum, fall off, become a safety hazard, and even lead to danger.
, how to deal with the dust layer surface sand, powdering problem? As the saying goes, "know-your-own, a hundred wars are not lost", want to solve the problem, we must first find out the cause, in order to

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To sum up, causing the surface of the plaster layer sand, powdering problems, there are usually the following reasons:
01 material problem
material water preservation is poor, resulting in wall construction, water loss too fast, too much, so that the hydration of whitewashed gypsum is not sufficient.
02 construction
the construction environment temperature is too high or the phenomenon of freezing, there will be too much water loss, insufficient hydration phenomenon. Normal gypsum ash work should be carried out at temperatures of 5-35 degrees C.
03 heat source baking
If the construction process, there is a heat source directly baking the wall, there will also be local temperature is too high, resulting in the wall water loss too fast.
can be seen on the comprehensive, causing the surface of the plaster layer sand, powder problem is the key, that is, "water loss", then to solve this problem, we need to pay attention to the following four points:
01 purchase quality qualified, water preservation rate is better whitewashed gypsum.
02 construction process should be closed full window, to avoid too large temperature difference, not allowed in negative temperature construction.
03 The new ash wall does not allow direct baking by heat sources.
04 If there is a powder drop during construction, it needs to be repainted with reinforcement.