矿渣-海水湿排粉煤灰复合胶凝材料的制备研究.pdfVIP

学兔兔 2014年第 5期(总第 295期 ) 混 凝 土 原材料及辅助物料 Number 5 in 2014(Total No．295) Concrete MATERIAI AND ADMINICLE doi：10．3969／j．issn．1002—3550．2014．05．019 矿渣一海水湿排粉煤灰复合胶凝材料的制备研究 伏程红。倪 文，王中杰，吴 辉，范敦城 (北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083) 摘 要：通过优化配合比组分、粒级设计和使用外加剂，制备出一种高掺量矿渣、粉煤灰且使用水泥熟料较少的矿渣一海水湿排 粉煤灰基复合胶凝材料。研究了独特的粉磨方式所制备的复合胶凝材料、石膏掺量、矿渣与粉煤灰的掺量及比例对复合高性能胶 凝材料体系强度的影响，初步阐明了复合胶凝材料的活性与级配协同优化效应。复合胶凝材料胶砂水胶比为0．33时具有较好的流 动度，胶砂试块养护28 d抗压强度可以达到53．53MPa，抗折强度达到13．92MPa，并具有良好的抗硫酸盐侵蚀性能，其氯离子含 量符合国家使用标准。 关键词：胶凝材料；矿渣；海水湿排粉煤灰；抗压强度；抗侵蚀性能 中图分类号： TU528．041 文献标志码：A 文章编号： 1002—3550(2014)05—0070—03 Properties and preparation of slag-seawter fly ash composite cementitious materials FUChenghong，NIWen，WANGZhongjie，WUHui，FANDtmcheng (Key Laboratory ofthe Ministry ofEducation ofChina for High—Efficient Mining and Safety ofMetal Mines， University of Science and Technology Beijing，Beijing 100083，China) Abstract： Cementitious materials with high volume of seawater fly ash and slag and less cement clinker were prepared by optimizing the proportion of ingredients and the size fraction and using an additive．By a special grinding modes，gypsum amount and the mix propor— tion of slag to fly ash on the strength ofthe cementitious materials were studied．The he collaborative optimization effect between the activi— ty and grading of the cementitious materials were preliinarily investigated．The results show that cementitious materials have good mortar fluiditywhenthewater-binder ratio(W／C)is 0．33．the compressive strengthofcolloidalmortar specimens curedfor 28 dis 53．53MPa and the 28 d flexural strength is 13．92 MPa，which have favorable properties oferosio