钢渣物化性质及其制备透水砖工艺技术研究

Physical and chemical properties of steel slag and its preparation technology of permeable brick

钢渣是炼钢过程中产生的主要副产物,钢渣综合利用有利于节能降耗和减排治污。本文以转炉钢渣为主要骨料,辅以水泥等胶凝材料,通过改变骨料配比,实现了生态透水砖的制备。试验运用XRF、XRD、SEM等分析方法,对钢渣透水砖的成分、物相、形貌进行了分析,得出钢渣主要物相为Ca_(2)SiO_(4)、Ca_(3)Mg(SiO_(4))_(2)和Ca_(2)Fe_(2)O_(5),且钢渣成分中各元素分布均匀,性能稳定;试验还考察了钢渣掺入量、骨胶比等对透水性、抗压强度、抗折强度等性能的影响,结果表明,在粗细骨料混合配比1∶1、钢渣掺入量80%、骨胶比6.6时,制成的钢渣透水砖强度高,透水性能好,成品性能符合《透水路面砖和透水路面板》(GB/T 25993—2010)标准要求。

Steel slag is the main by⁃product produced in the process of steel making.Comprehensive utilization of steel slag is beneficial to energy saving and pollution reduction.In this paper,with converter steel slag as the main aggregate,supplemented with cement and other cementing materials,by changing the aggregate ratio,the preparation of ecological permeable brick is realized.XRF,XRD,SEM and other analysis methods were used to analyze the composition,phase and morphology of steel slag permeable brick.The main phases of steel slag were Ca_(2)SiO_(4),Ca_(3)Mg(SiO_(4))_(2)and Ca_(2)Fe_(2)O_(5),and the elements in the steel slag composition were evenly distributed and the performance was stable.The effects of steel slag content and ratio of aggregate to cement on the properties of water permeability,compressive strength and flexural strength were investigated.The results show that when the coarse and fine aggregate mixture ratio is adopted,the steel slag content is 80%,and the ratio of aggregate to cement is 6.6,the steel slag permeable brick has high strength and good permeable performance,and the finished product conforms to the standard requirements of Permeable Pavement Brick and Permeable Pavement Board(GB/T 25993—2010).