摘要
通过XRD、SEM微观分析和宏观强度测试手段,探讨了适合作胶凝材料磷石膏颗粒的最大粒径,并对磷石膏-粉煤灰复合胶凝材料的最优配合比、最佳养护条件和凝结硬化机理进行了研究。结果表明,适合做胶凝材料的磷石膏颗粒最大粒径为4.75mm,磷石膏-粉煤灰复合胶凝材料的最优配合比为:m(磷石膏)∶m(生石灰)∶m(水泥)∶m(粉煤灰)=40∶15∶10∶35,最佳养护温度为90℃,养护时间为10 h。采用最优配合比90℃蒸汽养护10 h后自然养护的7 d、28 d的抗压强度分别为31.5 MPa、36.0 MPa。
Through XRD,SEM micro-analysis and strength measurements,this paper investigates into the limiting grain size of phosphogypsum suitable for making cementitious material. Simultaneously, it studies on the optimum mix ratio, the best curing method and hardening mechanism of the phosphogypsum-fly ash composite cementitious material. The result shows that the limiting grain size of phosphogypsum suitable for making cementitious material is 4.75 mm. The optimum mix ratio of the phosphogypsum-fly ash composite eementitinus material is, phosphogypsum：quick lime：cement：fly ash equal to 40：1.5：10：35,the best curing temperature is 90℃ and the besl curing tbne is 10h. After 90℃ steam curing 10h and then laboratory environment curing, the 7 d and 28 d compressive strength reach 31.5 MPa,and 36.0 MPa.
出处
《新型建筑材料》
2012年第4期65-69,共5页
New Building Materials
基金
四川省教育厅项目(10zd1104)
关键词
磷石膏
最大粒径
复合胶凝材料
强度
phosphogypsum
limiting grain size
composile cementitious material
strength
