玄武岩骨料碱活性试验研究

李 珍; 金宇; 马保国

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长江科学院院报 ›› 2007, Vol. 24 ›› Issue (2) : 43-45.

水工结构与材料

玄武岩骨料碱活性试验研究

李珍, 金宇, 马保国

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Study on Alkali-Silica Reactivity of Basaltic Aggregates

LI Zhen, JIN Yu, MA Bao-Guo

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摘要

碱-骨料反应对混凝土造成的破坏是极其严重并难以修复的，需要认真对待。针对某工程几种不同组成结构类型的玄武岩骨料，运用岩相法、砂浆棒快速法和混凝土棱柱体法进行了碱活性研究，并对砂浆棒快速法试样进行了扫描电镜 (SEM)及EDXA(energy dispersive X-ray analysis)测试分析。结果表明，由含有玉髓、微晶石英等矿物的玄武岩骨料具有潜在碱活性，且属典型的碱-硅反应。

Abstract

The alkali reactivities of different various compositions and textures of basaltic aggregate are studied by the petrography method, accelerated mortar-bar test method and concrete prism method.The test samples for adopting accelerated mortar-bar test are analysed by the SEM and the energy dispersive X-ray analy sis(EDXA). The experiment indicates that the basalts containing chalcedony and microcrystalline quartz possess potential alkali reactivity and belong to typical alkali-silica reaction.

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李珍, 金宇, 马保国. 玄武岩骨料碱活性试验研究[J]. 长江科学院院报. 2007, 24(2): 43-45

LI Zhen, JIN Yu, MA Bao-Guo. Study on Alkali-Silica Reactivity of Basaltic Aggregates[J]. Journal of Changjiang River Scientific Research Institute. 2007, 24(2): 43-45