当今发达国家，外加剂已成为混凝土第五种成分，其广泛应用被视为混凝土发展史上的第三次重大技术进展。　　有机硅合成剂(以下简称“有机硅”)作为混凝土外加剂，较好地解决了混凝土的自防水、高强、高流态、防冻、抗裂、抗碳化、减水、缓凝等世界性八大难题，已成为国家建设 In today’s developed countries, admixture has become the fifth component of concrete, and its wide application is regarded as the third major technological advance in the history of concrete. Silicone synthetic agent (hereinafter referred to as “silicone”) as a concrete admixture, a better solution to the concrete self-waterproofing, high strength, high fluidity, antifreeze, anti cracking, anti-carbonation, The problem has become a national construction