在混凝土或砂浆中掺入少量外加剂可改善混凝土的性能,节约水泥用量,降低工程造价,缩短施工周期。因此,研究和使用外加剂是混凝土材料及工艺中一个重要的课题。外加剂在混凝土中起着重要作用,已成为配制混凝土必不可少的第五种组成材料。目前,齐齐哈尔地区常用的外加剂基本是由减水剂——木质磺酸钙、早强剂——硫酸钠,早强催化剂——三乙醇胺与 Mixing a small amount of additives in concrete or mortar can improve the performance of concrete, save cement consumption, reduce project cost, and shorten construction period. Therefore, the research and use of admixtures is an important issue in concrete materials and processes. Admixtures play an important role in concrete and have become an indispensable fifth constituent material for the preparation of concrete. At present, the commonly used admixtures in Qiqihar area are basically water-reducing agents—calcium ligninsulfonate, early strength agent—sodium sulfate, and early strength catalyst—triethanolamine and