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原状稻壳灰及磨细灰对水泥胶砂强度和微观结构的影响

China Concrete and Cement Products(2019)

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Abstract
针对当前原状稻壳灰储量大,难以资源化利用的困境,研究了原状稻壳灰及其粉磨对水泥胶砂强度的影响,结合扫描电镜和氮吸附法分析其影响机理,同时比较其与粉煤灰对胶砂性能的影响.结果表明,原状稻壳灰显著降低了水泥胶砂强度,且随着其掺量的增加,其降低幅度越来越大;原状稻壳灰粉磨极大地增加了胶砂强度,与基准胶砂强度相近,大于粉煤灰胶砂;原状稻壳灰劣化了胶砂内部结构,且随着其掺量地增加,其内部结构越来越疏松多孔;原状稻壳灰粉磨有利于改善细化其内部孔结构.
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