Plaster plaster is an air-set material and can not be used in long-term contact with water。The prepared plaster paste should be used up before the initial setting of the paste。If the slurry has been initially coagulated, can not be used with water mixing, should be scrapped, adding water mixing will lead to powder, no strength, empty drum。Therefore, when using, we should pay attention to control the allocation of plaster paste。In addition, it should be noted that other cement mortar and lime mortar can not be mixed in the construction of plaster plaster。

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