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近年来,研制出各种混凝土的混和材料,显著提高了混凝土的质量,促进了混凝土技术的进步与发展。特别是优质火山灰,对提高混凝土质量的耐久性有明显的效果。另外,加气剂、减水剂等能够改善混凝土的和易性、耐久性、抗渗性。目前,各种混和材料按照不同的使用目的和用途被有效地应用于混凝土工程中。使用目的如下:
In recent years, various concrete mixing materials have been developed, which has significantly improved the quality of concrete and promoted the progress and development of concrete technology. In particular, high-quality volcanic ash has a significant effect on improving the durability of concrete. In addition, air entraining agents, water-reducing agents and the like can improve concrete workability, durability, and impermeability. At present, various mixed materials are effectively applied to concrete works according to different purposes and applications of use. The purpose of use is as follows: