中国碾压混凝土坝的混凝土配合比研究

A study on concrete mix proportion of RCC dams in China

根据中国已建的35座碾压混凝土坝的75个配合比设计资料,统计分析获得配合比参数的一般范围,对碾压混凝土配合比设计的一般方法进行了探讨。中国碾压混凝土配合比的特点是:水泥用量少,胶凝材料用量适中,混凝土绝热温升低,掺合料掺量高,抗渗和抗冻性能好。中国碾压混凝土配合比的技术水平已达到国际先进水平。

Based on 75 mix proportion materials from 35 RCC dams in China, the common values of mix proportion parameters have been found by using statistical analysis method. The common mix design method of RCC is introduced. The special features of the concrete mix proportions of RCC dams in China are less cement content, proper cemented material content, less insulating temperature rise of concrete hydration, higher admixture content, better impermeability and antifrost properties. The technical level of the mix proportions of RCC dams in China is evaluated.