高炉重矿渣作为细骨料对水泥砂浆性能的影响

发布时间：2018-04-08 22:07

本文选题：重矿渣砂　切入点：天然河砂　出处：《材料导报》2017年12期

【摘要】：测试了高炉重矿渣和重矿渣砂的组成、结构和性能,对比研究了重矿渣砂和天然河砂对水泥砂浆工作性能和力学性能的影响,从界面结构和孔结构角度分析了重矿渣砂提高水泥砂浆力学性能的作用机理。结果表明:重矿渣砂主要是由许多表面粗糙的颗粒和一些重矿渣微粉所组成,其粗糙的表面改善了骨料颗粒与基体之间的界面结构;重矿渣砂中重矿渣微粉降低了骨料的空隙率,改善了新拌砂浆的粘聚性和流动性,提高了硬化砂浆的致密性。利用重矿渣砂替代天然河砂可以配制出力学性能更好的砂浆,但会降低砂浆的工作性能。
[Abstract]:The composition, structure and properties of blast furnace heavy slag and heavy slag sand were tested. The effects of heavy slag sand and natural river sand on the working and mechanical properties of cement mortar were compared and studied.The mechanism of improving the mechanical properties of cement mortar by heavy slag sand is analyzed from the point of view of interface structure and pore structure.The results show that the heavy slag sand is mainly composed of many coarse surface particles and some heavy slag micro-powder, and its rough surface improves the interface structure between aggregate particles and matrix.The fine powder of heavy slag in heavy slag sand reduces the porosity of aggregate, improves the cohesion and fluidity of freshly mixed mortar, and improves the compactness of hardened mortar.The mortar with better mechanical properties can be prepared by replacing natural river sand with heavy slag sand, but the working performance of mortar can be reduced.
【作者单位】：安徽建筑大学安徽省先进建筑材料重点实验室;长江科学院水利部水工程安全与病害防治工程技术研究中心;
【基金】：长江科学院开放研究基金(CKWV2015220/KY) 国家自然科学基金(51308004;51479011) 安徽省高等教育人才项目(皖教高[2014]11号文) 高校优秀中青年骨干人才国内外访学研修项目(gxfxZD2016134) 安徽省教育厅自然科学研究项目(KJ2016A818)
【分类号】：TU528

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