摘要
本文对比研究了硅灰掺量、水泥用量对高强混凝土工作性能、力学性能和自收缩的影响规律;同时,研究了不同水胶比对硅灰配制低水泥用量高强混凝土抗压强度的影响规律。结果表明:胶凝材料用量600kg/m^3、硅灰掺量40kg/m^3、水泥用量在330～150kg/m^3之间时,均可配制出56d抗压强度≥75MPa的高强混凝土:硅灰配制高强混凝土时,水泥用量由330kg/m^3降至150kg/m^3时,可降低高强混凝土12d自收缩值约万分之4;水泥用量150kg/m^3,水胶比在0.20～0.25之间变化时,高强混凝土56d抗压强度降低值≤10MPa。
The effects of the content of silica fume and cement on the workability,strength,and autogenous shrinkage of high strength concrete are investigated in this paper,and the effects of water binder ratio on the strength of low cement dosage high strength concrete with silica fume are investigated.The results show that the 56d compressive strength of high strength concrete with 600 kg/ m3 cementitious materials,40kg/m^3 silica fume,and 330～150kg/m^3 cement is not less than 75MPa.When the content of cement reduce from 330kg/m^3 to 150kg/m^3,the autogenous shrinkage of high strength concrete with silica fume drop four hundred thousandth.When the content of cement is 150kg/m^3,and water binder ratio is between 0.20～0.25,the 56d compressive strength of high strength concrete drop less 10MPa.
出处
《商品混凝土》
2013年第5期25-28,共4页
Ready-Mixed Concrete
关键词
硅灰
高强混凝土
抗压强度
自收缩
silica fume
high strength concrete
compressive strength
autogenous shrinkage
