外墻涂料“返堿”現(xiàn)象成因及解決方案

摘要 : 分析外墻涂料出現(xiàn)返堿現(xiàn)象的原因 , 指出如何預(yù)防的方法, 列舉了事例。
關(guān)鍵詞 : 外墻返堿 ; 成因 ; 解決方法
　　外墻涂料施工后墻體出現(xiàn)返堿現(xiàn)象一直是困擾施工人員的一大難題 , 這一問(wèn)題會(huì)導(dǎo)致漆膜變色、褪色、表面殘留結(jié)晶鹽。傳統(tǒng)觀點(diǎn)認(rèn)為 : 水泥或白灰基層固化不良 , 含有過(guò)高的水分 , 墻面有堿性物存在 ;施涂后將基層封閉 , 水汽不能滲出 , 形成不平衡狀態(tài) , 導(dǎo)致底層中的堿性物質(zhì)、鹽類析出 , 使涂膜喪失附著力而脫落。
通過(guò)實(shí)踐 , 筆者認(rèn)為涂料返堿
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
 

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