外墙涂料-返碱-现象成因及解决方案.doc

外墙涂料“返碱”现象成因及解决方案

摘要 : 分析外墙涂料出现返碱现象的原因 , 指出如何预防的方法, 列举了事例。
关键词 : 外墙返碱 ; 成因 ; 解决方法
　　外墙涂料施工后墙体出现返碱现象一直是困扰施工人员的一大难题 , 这一问题会导致漆膜变色、褪色、表面残留结晶盐。传统观点认为 : 水泥或白灰基层固化不良 , 含有过高的水分 , 墙面有碱性物存在 ;施涂后将基层封闭 , 水汽不能渗出 , 形成不平衡状态 , 导致底层中的碱性物质、盐类析出 , 使涂膜丧失附着力而脱落。
通过实践 , 笔者认为涂料返碱
Exterior wall paint "back to base" phenomenon causes and solutions

Abstract: The phenomenon of exterior latex paint because there back to base, pointed out that the method of prevention, citing the examples.
Keywords: wall back to base; causes; solution
Exterior paint wall after construction there has been a troubled situation back to base construction workers a major problem, this issue will lead paint color, fading, surface residual crystalline salt. Traditional view: the grassroots of cement or mortar curing bad, with high water, the wall there are basic things; apply a defined grass-roots level will be closed and not leaking water vapor to form imbalance, leading to the bottom of the alkaline substances salt precipitation, so that the loss of adhesion of the coating off.
Through practice, I think back to base paint