How to solve the wrinkles after putty batch scraping


Release time:

2020-07-20

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Putty batch after scraping wrinkles

Putty batch of wrinkles after scraping is because the putty surface solvent (water) volatilization is too fast due to linear shrinkage, the solution is roughly three:

1. Delay the surface solvent volatilization rate, if it is
Water-based can consider adding some slow volatile water-soluble solvents, such as ethylene glycol, propylene glycol, etc;

2. Reduce the amount of film-forming materials (emulsion, resin, rubber powder, glue, etc.), and gradually change the film-forming materials in the system from continuous items to dispersed items, so as to reduce the wrinkles caused by the linear shrinkage of the surface during the drying process of putty;

3. Reasonable collocation of powder particle size, increase the grade ratio of coarse powder, so that the drying speed of the bottom layer is greater than or equal to the drying speed of the surface layer, and maximize the balance of putty layer drying to reduce wrinkles caused by linear shrinkage.


Powder drop

1. The basic wall is too dry, the wind speed is too large, and the water absorption is too strong. The water-resistant putty cannot be hydrated and solidified normally after it is put on the wall, resulting in surface pulverization. First, wet it with a rolling brush.

2. According to the normal construction process of the construction manual, this situation will not occur.

peeling

1, the grass-roots strength is too low, powder or fall off, resulting in the surface layer putty empty drum, or even peeling. More common in the water resistant putty to do in ordinary putty (containing large white powder, double fly powder, lime powder) layer and plaster layer surface.

2, the grass-roots wall is not clean, there is floating soil or other debris caused by water resistant putty can not be normal adhesion.

3. Improper maintenance of cement, demoulding of the base layer, resulting in a decrease in the adhesion of the cement surface, and the water-resistant putty cannot be attached normally.

Cracking

1. If the single drape is too thick, the water-resistant putty will crack and form micro cracks during the curing period.

2, high temperature construction, wind situation, low temperature construction.

Blistering

1, the grass-roots cement curing period is not over, alkaline is too large, resulting in water resistant putty layer in the curing period of alkaline high, after drying, leaving blistering traces.

2, the grass-roots wall is too dry, batch scraping speed is too fast, resulting in putty laminated with air to produce air drum, repeated batch scraping times to solve immediately.

Yellowing

1, and polyester paint (paint) or release agent at the same time construction, resulting in yellow putty film.

2, the grass-roots oil or other grease dirt, not clean, resulting in yellow putty film.

3. The putty film is contaminated by rust or other colored substances, which may cause the putty film to turn yellow.

4. The temperature is too low (below 5 ℃)

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