低碱“沙琪玛骨架”混凝土配比试验研究  

Experimental study on the proportion of low alkaline "shaqima framework" concrete

作　　者：蒋晓峰[1] 陈有亮[1] 罗仁安[2] 

机构地区：[1]上海大学土木工程系,上海200072 [2]上海市应用数学与力学研究所,上海200444

出　　处：《混凝土》2006年第11期7-9,共3页Concrete

基　　金：上海市教委重点科研基金资助项目(04AB05);上海市重点学科建设项目资助

摘　　要：以“沙琪玛骨架”混凝土的水灰比、灰骨比、减水剂掺量及水泥粉煤灰比例作为正交试验考察因素,通过考察四因素对混凝土7、14和28d的无侧限抗压强度和酸碱度的影响及对极差R的分析,得到四因素对强度和酸碱度影响的强弱关系;试验结果也说明在粉煤灰掺量在30%￣50%时“沙琪玛骨架”混凝土pH值可降至12以下,符合低碱要求“。沙琪玛骨架”混凝土孔隙率一般在44%￣48%之间,容重是普通建筑石料制成的大孔混凝土的50%￣60%。Through analyzing the concrete＇s 7, 14, 28d unconfined compression strength, pH value and R value, ＂Shaqima framework＂ concrete＇ s orthogonal experiment is designed to obtain the effect of four considering factors including water-binder ratio, binder-aggregate, water reducing agent cement-fly ash ratio on the compressive strength and pH value. Experimental result also shows 30%-50% fly ash content could reduce the ＂Shaqima framework＂ concrete＇s pH value to 12 even lower. The porosity of ＂Shaqima framework＂ concrete is between 44%-48% and the bulk density is 50%-60% weight of concrete made from ordinary aggregate.

关 键 词：沙琪玛骨架 生态混凝土 粉煤灰 正交试验 酸碱度 

分 类 号：TU528.2[建筑科学—建筑技术科学]