【摘要】 以流化床燃煤固硫渣为骨料,水泥为胶凝剂,添加一定量的碱激发剂制备透水砖。设计正交试验研究了固硫渣骨料级配、水泥和碱激发剂用量及成型压力对透水砖性能的影响,优化透水砖的配方和工艺参数。利用X射线衍(XRD)射仪和扫描电镜(SEM)对固硫渣及碱激发水化产物的微观结构进行了分析。结果表明,当10目、20目、60目固硫渣骨料级配为1:1:1,水泥用量35%(质量分数),碱激发剂添加量4%(质量分数),在1.5 MPa压力下成型、室温养护7 d制备出的成品,抗压强度达32 MPa,透水系数为1.3×10-2 cm/s,满足JC/T945-2005《透水砖》相关要求,为固硫渣的综合利用提供了一条新途径。更多还原

【Abstract】 The ecological permeable brick was prepared using desulfurization slags as aggregate, cement as gelling agent and alkali activators. A group of orthogonal test was arranged and carried out to study the effect of the mass ratio of slag with different particle size of 10 mesh, 20 mesh and 60 mesh, the content of cement, curing time and molding pressure on performance of permeable brick. The formulation and manufacturing process of permeable brick were optimized. The microstructures of permeable brick and hydras were analyzed by XRD ans SEM. The results show the generated bricks with 32 MPa compressive strength and 0.013 cm/s permeability coefficient could satisfy the JC/T945-2005 standard using the aggregate grading 1:1:1, 35 wt% of cement ratio, 4 wt% of alkali activators and under 1.5 MPa molding pressure and curing at room temperature for 7 d. It has provided a new route for the comprehensive utilization of desulfurization slag.更多还原