Reasons 1. Grass roots loosen and sand runoff occurs. The base is too smooth. 3. The base is polluted (dust, grease, demoulding agent, etc.). 4. Long-term immersion in the base. There is a layer of bright water scraping putty on the bottom. 6. Use inferior putty.

　　解決方案

　　Solution

　　1. 刮除剝離膩?zhàn)訉?，選用優(yōu)質(zhì)膩?zhàn)庸巍?. 對(duì)于嚴(yán)重粉末狀的施工表面，采用優(yōu)質(zhì)的墻體水泥進(jìn)行涂裝和密封;墻面固定干燥后，膩?zhàn)訉蛹纯尚迯?fù)。3、浸泡墻面，消除陽(yáng)光曬干，施工前必須涂抹防水涂料進(jìn)行膩?zhàn)訉有扪a(bǔ)。4、膩?zhàn)拥恼_選擇和搭配，膩?zhàn)拥膹?qiáng)度不匹配，即種方式的膩?zhàn)訌?qiáng)度低于第二種方式的膩?zhàn)訌?qiáng)度。

　　1. Scrape and peel off putty layer and select high-quality putty to scrape. 2. For the severely powdered construction surface, high-quality wall cement is used for painting and sealing; after the wall is fixed and dried, putty layer can be repaired. 3. Immerse the wall, eliminate sunshine drying, and apply waterproof paint to repair putty layer before construction. 4. Proper selection and collocation of putty, putty strength does not match, that is, putty strength of the first way is lower than that of the second way.