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砂岩骨料的碱活性检测与抑制试验

Tests of detection and inhibition of alkali aggregate reactivity for sandstone

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【Author】 LI Beixing~1,HU Xiaoman~1,WEN Ziyun~2,LI Shuangyan~3(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan430072,China;2.College of Materials Science and Engineering,South China University of Technology,Guangzhou510641,China;3.Survey and Design Institute of Middle South of China,Changsha 410014,China)

【机构】武汉大学水资源与水电工程科学国家重点实验室；华南理工大学材料科学与工程学院；中南勘测设计研究院湖北武汉430072；湖北武汉430072；广东广州510641；湖南长沙410014；

【摘要】用岩相法、砂浆棒快速法、溶胶-凝胶膨胀法和混凝土棱柱体法,联合研究了砂岩骨料的碱硅酸反应(ASR)活性,评价了粉煤灰对该砂岩ASR膨胀的抑制效果.试验结果一致表明了该砂岩骨料具有潜在的ASR活性,其碱活性主要来自于玉髓状微晶石英和波状消光石英.采用20%的Ⅰ级粉煤灰替代水泥,可以把这种砂岩的ASR膨胀量控制在非碱活性范围之内.更多还原

【Abstract】 The alkali-silica reaction(ASR) of sandstone aggregate is determined by means of petrographic examination,mortars-bar test and sol-gel expansion test as well as concrete prism expansion method;and the effect of fly ash on inhibiting the ASR expansion occurred in the sandstone is evaluated.The experimental results congruously show that the sandstone aggregate is alkali-silica reactive,and the reactivity mainly results from chalcedonic microcrystalline quartz and undulated extinction quartz.The expansion value due to ASR for the sandstone can be reduced to a non-reactive range by substituting cement with 20% first grade fly ash.更多还原

【关键词】砂岩骨料；碱活性；粉煤灰；抑制；
【Key words】 sandstone aggregate； alkali reactivity； fly ash； inhibition；

【文献出处】武汉大学学报(工学版) ,Engineering Journal of Wuhan University , 编辑部邮箱 ,2006年01期

【分类号】TU528.041
【被引频次】5
【下载频次】222

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