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混凝土化学外加剂的研制与使用,近年来在国内外有很大的发展。欧美日等一些国家已编有混凝土外加剂的规范和规定;还有的国家把混凝土外加剂做为混凝土原材料的第五个组份。据资料介绍,1970年美国外加剂费用为5千万美元,据苏联杂志报导,如果苏联在40％的混凝土中使用外加剂,每年可节约水泥200万吨。几个资本主义国家在混凝土中掺用化学外
The development and use of concrete chemical admixtures have seen great development at home and abroad in recent years. Some countries in Europe, America, Japan and other countries have compiled specifications and regulations for concrete admixtures; others have used concrete admixtures as the fifth component of concrete raw materials. According to information, in the United States in 1970, the cost of admixtures was 50 million U.S. dollars. According to Soviet magazine reports, if the Soviet Union used admixture in 40% of concrete, it could save 2 million tons of cement annually. Several capitalist countries mix chemical in concrete