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为了改善混凝土性能,目前使用的高性能外加剂有高效减水剂、缓凝剂以及引气减水剂。从而极大地改善混凝土内部结构、提升混凝土耐久性以及减少微裂缝。高性能外加剂与外加剂的主导官能团、氢键以及特殊的化学机构有着极为密切的关系,不同的主导官能团类型可以对分散减水性、减小坍落度以及缓凝性有着不同作用。文章基于高性能外加剂官能团的分类,重点论述了高性能外加剂的结构、种类以及作用机理。
In order to improve the performance of concrete, currently used high-performance admixture superplasticizer, retarder and air-drying superplasticizer. Thus greatly improving the internal structure of concrete, improve the durability of concrete and reduce micro-cracks. High-performance admixture and admixture of the dominant functional groups, hydrogen bonds and special chemical institutions have a very close relationship between the different types of leading functional groups can be distributed on the water reduction, reduce slump and retardation have different effects. Based on the classification of functional groups of high performance admixture, the article focuses on the structure, types and mechanism of high performance admixture.