石灰石尾矿机制砂制备干粉砂浆的性能研究.pdf

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粉煤灰综合利用 2013no.3 FLY ASH COMPREHENSIVE UTILIZATION试验与应石灰石尾矿机制砂制备干粉砂浆的性能研究 Study on the Properties of Dry-mixed Mortar Made of Limestone Tailings Mechanism Sand刘娟红,包文忠2,赵文新2,靳冬民2,张黎2 (1北京科技大学,北京;2新疆天山水泥股份有限公司,乌鲁木齐830013) 摘要:采用含有16%石粉的机制砂为原料制备干粉砂浆。研究羟丙基纤维素、消泡剂、减水剂及粉煤灰对M5.0 M30千粉砂浆性能的影响。结果表明:纤维素掺入砂浆,大大改善了砂浆保水性能但使强度有所降低;在干粉砂浆中加入0.1%的纤维素,同时加入消泡剂和减水剂,可以提高强度;粉煤灰的加入可以改善胶砂比较小的干粉砂浆的泌水现象。关键词石灰石尾矿机制砂干粉砂浆;羟丙基纤维素消泡剂中图分类号:TU177 文献标识码:A 章编号:1005-8249(2013)03-0028-05 Liu Juan-hong .Bao Wen-zhong . ZhaoWen-xin . JinDong-min Zhang Li( Xinjiangtianshan cement .,LTD wulumuqi 830013 ,china Abstract :The dry-mixed mortar is made of the mechanism sand which contains 16% limestone powder .This article studied the influence of hydroxyl propyl cellulose . defoamer.w ater reducer and fly ash on the performance of .0-M30dry-mixed mortar .The resultsshow that mixing fiber into cement mortar greatly improves the cement's water retention capacity but its strength decreased Addition of0.1% fiber into dry-mixed mortar ,mixingwith the defoamer and water reducer at the same time , canimprove the cement's strength . The addition of fly ash can improve the bleeding of dry-mixed mortar with small cement ...

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