本附加剂主要为了提高水泥砂浆、混凝土的早期强度,由分散剂、碱金属硫酸盐、铝酸钙、石膏构成。历来在水泥中加表面活性剂,使水灰比下降,从而增加砂浆、混凝土的长期强度。然而在水泥砂浆、混凝土制品或现浇混凝土中,为了加快制备过程和加快施工,希望混凝土早强。作为改善措施,采用加入例如萘磺酸-甲醛缩合物钠盐、多环芳香族磺酸钠盐含磺酸根的三聚氰胺-甲醛缩合物减水剂等方法。但这种 This additive is mainly used to improve the early strength of cement mortar and concrete and consists of dispersant, alkali metal sulfate, calcium aluminate, and gypsum. Traditionally, surfactants have been added to cement to reduce the water-cement ratio, thereby increasing the long-term strength of mortar and concrete. However, in cement mortar, concrete products or cast-in-place concrete, in order to speed up the preparation process and speed up the construction, it is hoped that the concrete will be strong early. As a measure for improvement, a method such as adding a sodium salt of a naphthalenesulfonic acid-formaldehyde condensate, a sodium salt of a polycyclic aromatic sulfonate, a melamine-formaldehyde condensate water reducer containing a sulfonate, or the like is used. But this