聚羧酸在清水混凝土制备中的应用

Application of polycarboxylic acid in the preparation of as-cast finish concrete

清水混凝土是指采用现浇工艺一次成型,且在拆除浇筑模板后不再作外部抹灰等工序,以混凝土自然色作饰面的混凝土施工工艺。清水混凝土的常见病中,泌水引起的水线,以及蜂窝麻面、气孔、黑印尤为突出。聚羧酸盐减水剂具有低掺量、高减水、低收缩、流动性好等特点,使用聚羧酸盐减水剂及其复配技术可以有效地防止清水混凝土的常见病,取得工程中比较满意的效果。

As-cast Finish Concrete is a technology of concrete construction with the natural color of concrete for the facing,which once formed by cast-in-place technique,and no longer do external plastering after removing the pouring template.In the common diseases of As-cast Finish Concrete,water-line caused by bleeding,and voids and pits,pores,and black pot are particularly.With the polycarboxyate superplasticizer characteristics of low content,high water-reducing,low shrinkage and good fluidity,using polycarboxyate superplasticizer and compositional technology can effectively prevent the common diseases of As-cast Finish Concrete to achieve satisfied results,the use of polycarboxylic acid and salt water-reducing agent technology