超高强高性能混凝土的配制研究  

Research on Preparation of Ultra High Strength Concrete

作　　者：王军[1] 程宝军[1] 贾丽莉[1] 刘通[1] 

机构地区：[1]中建商品混凝土有限公司,武汉430074

出　　处：《混凝土与水泥制品》2013年第11期18-22,共5页China Concrete and Cement Products

基　　金：中建股份科技资助(CSCEC-2013-Z-31)

摘　　要：研究了复合水泥粉体压实体空隙率的变化规律,优化了混凝土胶材组分,并研究了胶料总量、水胶比对超高强混凝土工作性能和抗压强度的影响。在以上研究基础上,开展了沸石粉配制超高强高性能混凝土的试验研究。结果表明,微珠掺22%,硅灰掺8%,复合粉体空隙率最低,堆积密度最大;胶凝材料总量700kg/m3,水胶比0.16时,混凝土抗压强度最高,60d和90d抗压强度分别达146.5MPa和159.7MPa;掺4%沸石粉配制的超高强混凝土60d和90d抗压强度分别为136.7MPa和148.1MPa,比不掺沸石粉的混凝土抗压强度分别降低约4.7%和6.0%,降幅较小;混凝土3d和7d自收缩值分别为万分之0.91和万分之1.82,比不掺沸石粉的混凝土分别降低约21.6%和11.7%,降低混凝土的自收缩作用明显。The compacting voidage of composite powder pressure entities is studied, and the components of concrete cementing materials are optimized, and the influences of cementing material content, water binder ratio on the working performance and compressive strength of the ultra high strength concrete are researched. Based on the above study, the experimental study on preparation of ultra high strength concrete by zeolite powder is carried out. The results show that when the content of microsphere and silica fume are 22% and 8% separately, the system of microsphere-silica fume-cement composite achieves the densest packing density. When the total amount of cementitious material is 700kg/m^3, and the water-cement ratio is 0.16, the compressive strength of concrete curing for 60d and 90d are 146.5MPa and 159.7MPa respectively. When adding with 4% zeolite powder, the compressive strength of concrete curing for60d and 90d are 136.7MPa and 148.1MPa respectively, with a smaller decline of 4.7% and 6.0% compared with concrete without zeolite powder. At the same time, the experimental results show that the autogenous shrinkage of concrete added with 4% zeolite powder curing for 3d and 7d are 91ppm and 182ppm respectively, reduced by 21.6% and 11.7% than concrete without zeolite powder, which significantly reduced the autogenous shrinkage of concrete.

关 键 词：微珠 沸石粉 超高强混凝土 抗压强度 自收缩 

分 类 号：TU528.31[建筑科学—建筑技术科学]