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为提高钢筋混凝土构件和结构的质量,降低能耗,免去浇筑和振捣混凝土拌合物的重体力劳动并改善混凝土工的劳动卫生条件,当前苏联正逐步向流态混凝土(坍落度20～25cm)浇筑法过渡。在现浇结构施工中,采用流态混凝土拌合物可节约50～70%的劳动消耗。在苏联,由于注意了外加剂的研制、生产和应用,流态混凝土成型方法在近10年来得到了发展。苏联现在已有50种单一和60种复合外加剂,1985年。各种混凝土外加剂的产量达到32万 t(其中超塑化剂约3万 t),掺外加剂的混凝土占混凝土总
In order to improve the quality of reinforced concrete structures and structures, reduce energy consumption, eliminate the heavy manual work of pouring and vibrating concrete mixes, and improve the labor hygiene conditions of concrete workers, the Soviet Union is gradually moving toward flowing concrete (slump 20 ~ 25cm) casting method transition. In the construction of cast-in-place structures, the use of a fluid concrete mix can save 50 to 70% of labor consumption. In the Soviet Union, due to the attention paid to the development, production, and application of admixtures, the method of forming concrete in the form of a stream has developed in the last 10 years. The Soviet Union now has 50 single and 60 compound admixtures in 1985. The output of various concrete admixtures reached 320,000 tons (of which about 30,000 tons of superplasticizer), concrete with admixture accounted for concrete