在混凝土中掺外加剂是改善、提高混凝土性能和节约能源的有效途径。一些工业发达国家,如北欧各国,日本、美国、西德、苏联等国家有50%以上的水泥掺加外加剂。外加剂几乎成了配制混凝土的第五组份。我国当前仅有10%左右的混凝土掺外加剂,与先进国家相比,差距较大,其中水泥制 Adding admixtures in concrete is an effective way to improve and improve concrete performance and save energy. Some industrialized countries, such as the Nordic countries, Japan, the United States, West Germany, the Soviet Union and other countries have more than 50% cement admixtures. The admixture has almost become the fifth component of the formulated concrete. In China, only about 10% of concrete admixtures are present at present, and there is a big gap compared to advanced countries, of which cement is