炉渣胶凝材料配比优选及充填体性能

    Ratio Optimization of Slag Cementitious Material and the Properties of Filling Body

    • 摘要: 这是一篇陶瓷及复合材料领域的论文。针对某铅锌矿全尾砂充填以水泥为胶凝材料成本过高和充填体后期强度低的问题,采用丰富的炉渣固废资源,开发低成本炉渣胶凝材料满足矿山充填体的质量需求。在对尾砂、炉渣和水泥熟料进行物化分析后,通过充填料浆坍落度实验和炉渣胶凝材料配比探索实验,确定满足流动性的料浆浓度为70%左右,炉渣与水泥熟料比值为2~4为较优配比区间;通过全面实验法探究了不同配比炉渣胶凝材料充填体强度,充填料浆的泌水率和凝结特性。结果表明:炉渣胶凝材料配比为炉渣添加量75%~80%,水泥熟料添加量20%~25%,充填体能够满足强度0.5~3.5 MPa,充填料浆泌水率小于5%的充填质量要求。

       

      Abstract: This is an essay in the field of ceramics and composites. To solve the problems of high-cost for cement cementitious material and low strength of cement filling body at the later stage in a lead-zinc mine, abundant slag solid waste resources were adopted and low-cost slag cementitious materials were developed in this paper to meet the quality requirement of mine fillings. After physical and chemical analysis of tailings, slag and cement clinker, the physical and chemical analysis of tailings, slag and cement clinker was carried out. Then, through the filler slurry slump test and the exploration test of the ratio of slag cementitious material, it is determined that the slurry concentration satisfying the fluidity is about 70%, and the ratio of slag to cement clinker is 2~4. The strength, bleeding rate and coagulation characteristics of filling body with different proportions of slag cementitious materials were investigated by comprehensive test. The results show that the ratio of slag cementitious material is 75%~80% slag and 20%~25% cement clinker, the filling body can meet the filling quality requirements of 0.5 ~3.5 MPa compressive strength and the filling slurry bleeding rate is less than 5%.

       

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