粉煤灰标准砖捏混及蒸养条件的试验研究  

Experimental study on pugging mullering and steam curing conditions of standard brick with fly ash

作　　者：荣令坤[1] 张金山[1] 

机构地区：[1]内蒙古科技大学矿业工程学院,内蒙古包头014010

出　　处：《新型建筑材料》2011年第2期64-66,共3页New Building Materials

基　　金："十一五"国家科技支撑计划项目(2009BAB49B03)

摘　　要：利用包头地区电厂粉煤灰、少量水泥、河砂,在碱性复合激发剂存在的情况下,通过湿热养护工艺制成承重标准砖。在已确定的较佳原料配方条件下,研究砖体在捏混过程及蒸养阶段的影响因素。结果表明,在较佳配方:粉煤灰掺量58.33%,水泥8.33%,激发剂16.67%,河砂16.67%,相对固体含量成型水分为14%条件下,较佳的捏混及蒸条件为:捏混搅拌7 min,70℃下恒温蒸养6 h,蒸养后粉煤灰砖的抗压强度为12.65 MPa,蒸养后再标准养护28 d的抗压强度为20.18 MPa,抗折强度为3.5 MPa。The standard load-bearing brick was made frmn the fly ash in Baotou power plants,small quantity of cement,river sand and alkaline compound activator by wet thermo-curing method. Under the known optimal raw material formulation,the task continued to study the influencing factors in the processes of pugging mullering and steam curing. The results show that under the optimal formulation （fly ash of 58.33%,cement of 8.33%,activator of 16.67% and river sand of 16.67%）,and relative＇solid content forming moisture of 14%,the optimal pugging mullering and steam curing conditions are： pugging mullering for 7 minutes,curing for 6h under constant temperature of 70 ℃. After steam curing,the compressive strength is 12.65 MPa. Then,the compressive strength and bending strength after are 28d standard curing up to 20.18 MPa and 3.5 MPa respectively.

关 键 词：粉煤灰砖 捏混 蒸养 正交试验 抗压强度 

分 类 号：TU522.1[建筑科学—建筑技术科学]