论文部分内容阅读
苏联从改善混凝土性能和节约能源出发,十分重视混凝土化学外加剂的研究和应用。1976年,提出了“混凝土化学化”的口号,并指出主要方向是采用复合外加剂。现在苏联单一和复合外加剂的品种有70多个,其中单一成分的大都在复合使用。1980年,几乎所有的预制钢筋混凝土中都使用了外加剂,掺外加剂的混凝土达13000万立方米,占混凝土总量的52%。以节约水泥为主要目的,廉价(约50卢布/吨)的外加剂,如СДБ(木质素磺酸钙)、ССБ(亚硫酸盐酒精废液)最普及。由于采用
The Soviet Union paid great attention to the research and application of concrete chemical admixtures starting from improving concrete performance and saving energy. In 1976, the slogan “Chemical Concrete” was proposed and the main direction was to use composite admixtures. Currently, there are more than 70 varieties of single and compound admixtures in the Soviet Union, of which most of the single components are used in combination. In 1980, almost all of the prefabricated reinforced concrete used admixtures, and the admixture-containing concrete amounted to 13 million cubic meters, which accounted for 52% of the total amount of concrete. With the main purpose of saving cement, cheap (about 50 roubles/ton) admixtures such as СД (calcium ligninsulfonate) and ССБ (sulfite alcohol waste liquor) are the most popular. Due to adoption