高炉重矿渣作为细骨料对水泥砂浆性能的影响  

Effect of Air-cooled Blast Furnace Slag as Fine Aggregate on the Properties of Cement Mortar

作　　者：王爱国[1] 石妍[2] 刘开伟[1] 孙道胜[1] 吕邦成 刘朋[1] 

机构地区：[1]安徽建筑大学安徽省先进建筑材料重点实验室,合肥230022 [2]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,武汉430010

出　　处：《材料导报》2017年第12期121-125,共5页Materials Reports

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)

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。Compositions, structures and properties of air-cooled blast furnace slag and air-cooled blast furnace slag sand （ABFSS） were tested, workability and mechanical properties of mortars prepared with ABFSS and natural river sand （NRS） were contrastively investigated, mechanism of ABFSS improving the mechanical properties of mortar was analyzed from interface structure and pore structure. The results show that ABFSS is composed of many aggregate particles with rough surface and a number of pow- der particles, particles with rough surface texture improve interfacial structure between aggregate particles and matrix. Powder parti- cles in the ABFSS reduce void of aggregate, improve cohesiveness and fluidity of fresh mortar and increase compactness of hardened mortar. ABFSS can be used to produce a mortar with better mechanical properties than corresponding mortar made with NRS, but it reduces the workability of mortar.

关 键 词：重矿渣砂 天然河砂 砂浆 力学性能 工作性能 

分 类 号：TU528[建筑科学—建筑技术科学]