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本文介绍了碱-集料反应的类型、事例以及怎样鉴定发生碱-集料反应的活性集料的方法,提出了使用碱活性集料时应注意的问题。可供混凝土工程建设的参考。一、碱-集料反应简介水泥中的碱与混凝土中的某些集料会发生化学反应,引起混凝土膨胀、开裂,甚至破坏,称为碱-集料反应。自1940年美国的 T.E.Stanton 发现了由碱-集料反应引起混凝土工程破坏以来,对这方面的研究得到了广泛的重视。到1986年已召开了七次国际性碱-集料反应会议。今年将在日本召开第八届国际碱
In this paper, the types of caustic-aggregate reactions, examples of how to identify the active aggregates in which alkali-aggregate reactions occur, and the issues that should be addressed when using alkali-active aggregates are presented. Reference for concrete construction. 1. Alkali-aggregate reaction Introduction The alkali in cement reacts with some aggregates in concrete to cause concrete expansion, cracking, and even destruction, which is called alkali-aggregate reaction. Since T.E. Stanton of the United States discovered the destruction of concrete works caused by the alkali-aggregate reaction in the United States in 1940, the research in this area has received extensive attention. By 1986, seven international alkali-aggregate reaction conferences have been held. This year will be held in Japan’s eighth international base