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混凝土外加剂有很多种类,主要按其功能分类,有高性能减水剂、高效减水剂、普通减水剂、引气减水剂、泵送剂、早强剂、缓凝剂和引气剂等。高性能减水剂是近年开发的新型外加剂,目前主要使用品种为聚羧酸盐类产品,它具有“流状”的结构特点,根据其组成的分子设计引入不同功能团,控制成分比例和反应条件可生产出具有各种不同性能和特性的高性能型、早强型、标准型和缓凝高性能型等减水剂,该类减水剂也可掺入不同组分复配而成。其减水效率高,混凝土拌合物工作性及工作性保持性较好,氯离子和碱含量较低,有效改善体积稳定性和耐久性,并与水泥适应性好,能很好地满足混凝土的施工要求,极大地降低了混凝土蜂窝、麻面等缺陷,硬化后的混凝土强度高,饰面效果好。而其生产和使用过程中不污染环境,是环保型外加剂。
There are many types of concrete admixtures, mainly classified according to their functions, there are high performance water reducer, superplasticizer, ordinary superplasticizer, air entraining water reducer, pumping agent, early strength agent, retarder and bleed air Etc. High-performance water reducer is a new type of additive developed in recent years. At present, the main types of polycarboxylates are polycarboxylates, which have the structural characteristics of “flow-like shape” and introduce different functional groups according to their molecular design, Proportional and reaction conditions produce high-performance, early-strength, standard and retarding high-performance superplasticizers with a variety of properties and characteristics, which can also be incorporated with different components to make. The water reducing efficiency is high, the workability and workability of the concrete mixture are good, the chloride ion and the alkali content are relatively low, the volume stability and the durability are effectively improved, the cementitious material has good adaptability with the cement and can well satisfy concrete The construction requirements, greatly reducing the defects of concrete honeycomb, pitted and so on, high strength concrete after hardening, finishing effect is good. And its production and use of the process does not pollute the environment, is environmentally friendly additives.