碱-集料反应的分类

CLASSIFICATION OF ALKALI-AGGREGATE REACTION

目前碱-集料反应分成三类,即碱-硅酸反应,碱-硅酸盐反应和碱-碳酸盐反应。分类不仅具有学科意义,同时与寻找鉴定集料的新方法和防止措施均密切相关。本文综述了分类形成的历史过程,各类反应的主要特徵、反应机理及其相应的鉴定方法和抑制措施。根据近年来的研究结果,文中提出,碱虽然会与某些页硅酸盐反应,但未证实会导至膨胀。因而认为没有必要分出单独一类碱-硅酸盐反应,而建议分成碱-硅酸反应和碱-碳酸盐反应两类。

Up to now alkali-aggregate reactions have been divided into three types: alkalisilica reaction, alkali-silicate reaction and alkali-carbonate reaction. The classification is not only scientific importance, but of significance also for determining the method of identifying alkali reactivity of aggregate and for searching for preventive measures. The history of the classification of alkali-aggregate reactions, the major characteristics, the expansion mechanisms, test methods and preventive measures are comprehensively analyzed in this paper. Although the results of studies carried out in recent years show that alkali may attack some phyllosilicates, there is an insufficient evidence to confirm these minerals cause damaging expansion. it seems unreasonable to separate an unique type, alkali-silicate reaction. As a result, we suggest that alkali-aggregate reaction is divided into two types: alkali-silica reaction and alkali-carbonate reaction.