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近些年来,我国外加剂的研究和生产都取得了很大进展。《混凝土减水剂质量标准和试验方法》JGJ 56—84和混凝土外加剂应用技术规范的制定和颁发,外加剂品种和产量的增加,提高了外加剂在混凝土中的使
In recent years, great progress has been made in the research and production of China’s admixtures. The formulation and issuance of the technical standards for concrete water reducer quality standards and test methods JGJ 56-84 and concrete admixtures, and the increase in the variety and output of admixtures have increased the use of admixtures in concrete.