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

• 水工结构与材料 • 上一篇    下一篇

玄武岩骨料碱活性试验研究

 李 珍, 金宇, 马保国   

  • 出版日期:2007-04-01 发布日期:2012-03-05

Study on Alkali-Silica Reactivity of Basaltic Aggregates

 LI   Zhen, JIN  Yu, MA  Bao-Guo   

  • Online:2007-04-01 Published:2012-03-05

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.