长期以来就存在的混凝土中碱—集料反应,近年在我国(如北京等地)一些工程中也被发现,并引起了有关部门的重视。这种反应对混凝土工程的破坏是相当严重的。所以在勘查水泥原料和集料时,应对前者的碱成分和后者的活性硅等成分加以 The alkali-aggregate reaction in concrete that has existed for a long time has been found in some projects in China (such as Beijing and other places) in recent years, and has attracted the attention of relevant departments. This kind of reaction to the concrete works is very serious. Therefore, in the exploration of cement raw materials and aggregates, it is necessary to deal with the alkali components of the former and the active silicon of the latter.