Before the construction of the project, it is necessary to ensure that the rural grass-roots level is dry, firm and free of loose materials such as oil pollution. For example, the old powder, caulking mortar and paper reinforcement powder approved by the original rural grass-roots level must be cleaned completely; the time interval between two scraps shall be identified before one scraping, and one scraping shall be conducted after one scraping; the reasons for clean and tidy cleaning behind the old wall, horizontal porosity and looseness of the rural foundation shall be solved by clear and loose position, and one brush structure integration agent, with more porosity It is to select putty powder to scrape thin batch and add filling porosity treatment. If foam is caused after drying, the soil will be scraped thick again after the foam. In addition, the humidity of the wall environment is too high, and the putty is easy to generate bubbles. The consistency of putty powder mortar is too low, and the batch scraping is also easy to generate bubbles and shrinkage. Please pay attention to the adjustment of viscosity when the painter mixes the putty powder. After the construction of emulsion paint, polish the wall as much as possible one week later, otherwise it is easy to cause the internal wall putty to be powdered.

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