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为建立快速鉴定硅质集料碱活性的方法 ,以沸石化珍珠岩和硅质砾石为集料研究了胶砂比和集料级配对砂浆试体ASR膨胀的影响。结果表明 :对检测集料ASR活性而言 ,快速砂浆棒法 (ASTMC12 6 0和CSAA2 3 2 - 2 5A)所建立的集料级配和胶砂比不是最敏感条件。采用单级配集料和多胶砂比砂浆试体可以更快速、可靠地鉴定集料ASR活性
In order to establish a method for rapidly identifying alkali activity of siliceous aggregates, the effects of mortar ratio and aggregate gradation on the ASR swelling of mortar specimens were studied by using zeolitized perlite and siliceous gravel as aggregates. The results showed that aggregate gradation and mortar ratio were not the most sensitive conditions for the determination of aggregate ASR activity by rapid mortar rod method (ASTMC12 6 0 and CSAA2 3 2 - 2 5A). ASR activity of aggregates can be identified more quickly and reliably using single-stage and multi-grit mortars