How to avoid whitewashing plaster cracking, you know?

Whitewashing gypsum is also called plaster, not only and easy, strong bonding force, but also fast hardening, but also has fire protection, light, insulation and other characteristics, so it is now widely used in construction. However, some teachers were troubled by the cracking of the whitewashed plaster. Today we're going to have a chat about how to deal with

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first, take a look at the reasons for the cracking of the whitewashed plaster:
because of the slow water absorption of concrete, there is moisture when the plaster layer is bonded to the wall, causing the ash surface to crack. Some teachers will be in the construction, in the aeration of concrete walls coated with a layer of interface agent, so as to solve the problem of bonding, but still can not solve the phenomenon of cracking.
, if the grass-roots clean-up before the dust is not clean, not thorough, will also cause empty drum cracking. In addition, before the ash is not watered, each layer of whitewashed plaster is too thick, the second time between the plastering distance from the first time the ash is too short, the loose material of the concrete surface is not treated on the plaster, affecting the bonding force between the whitewashed gypsum and the wall, the aeration of the concrete surface is not cleaned, do not water on the ash, after the ash is not maintained and so on, will cause the plaster to appear empty drum, cracking and so on.
, how to avoid whitewashing plaster cracking?
01 Material Use Precautions
whitewashed gypsum is an air-hard material and cannot be used in long-term contact with water. Well-made whitewashed gypsum paste, pay attention to the slurry before the initial condensation. If the slurry has begun to condense, can no longer add water stirring use, should be scrapped, and then add water stirring will lead to powdering, no strength, empty drum. Therefore, when using, pay attention to control the amount of whitewashed gypsum slurry. In addition, it should be noted that when painting gypsum ash construction, there can be no other cement mortar and lime mortar mixed into the mixed use.
02 Precautions during construction
Before using whitewashed gypsum construction, to thoroughly clean the wall surface of the grass surface of the floating ash, oil stains, loose particles and so on, to ensure that the whitewashed gypsum and the grass-roots bonding is good, to prevent the appearance of empty drum phenomenon.
Grass-roots absorption of water in the whitewashed gypsum slurry, will also make the whitewashed gypsum cracking phenomenon, so in the construction process, according to the grass-roots materials, construction environment and temperature differences, to properly and uniformly spray water, to ensure that the grass-roots to meet the construction requirements of the humidity, and then dust. Dusting should ensure that there is no water on the grassy surface of the wall.
, pay attention to the construction temperature of the whitewashed gypsum, and according to the temperature situation when the deployment of the whitewashed gypsum slurry pay attention to the ratio of powder to water.
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