石粉含量对高性能混凝土性能影响  

Effect of stone powder content on the high performance concrete

作　　者：王恒 郭君华[3] WANG Heng;GUO Junhua(Beijing Mining Coal Engineering Co.,Ltd.,Beijing 100013,China;Institute of Mine Construction,China Coal Research Institute,Beijing 100013,China;China Building Materials Academy,Beijing 100013,China)

机构地区：[1]北京中煤矿山工程有限公司,北京100013 [2]煤炭科学研究总院建井分院,北京100013 [3]中国建筑材料科学研究总院有限公司,北京100013

出　　处：《混凝土》2021年第8期75-78,共4页Concrete

基　　金：国家重点研发计划“高抗裂预拌混凝土关键材料及制备技术”(2017YFB0310100);国家自然基金面上项目(51774183)。

摘　　要：为满足高性能混凝土在冻结井筒井壁中应用,通过现场配合比试验,研究了机制砂中石粉含量对砂浆流变性能、C80混凝土坍落度、扩展度、抗压强度、弹性模量值等参数的影响,试验结果表明,在水洗骨料条件下,石粉含量在3%~6%时,可确保混凝土具有良好的工作性能。以此试验结果进行C80~C100混凝土井壁配合比浇筑后,经现场取样测试的高性能混凝土强度值超过设计值1.15倍。In order to satisfy the high performance concrete used in frozen shaft wall,using scene matching test,the influence of the parameters,such as the mechanism of sand stone powder content on the rheological properties of mortar,C80 concrete slump,extension ratio,compressive strength and elastic modulus value,were studied.The experimental results show that under the condition of water washing aggregate,3%~6%,content of the stone power ensure the good performance of the concrete.According to this result,the strength of HPC measured by field sampling is 1.15 times higher than the design value after the C80~C100 concrete sidewall proportioning pouring is carried out.

关 键 词：高性能混凝土 石粉 工作性能 冻结法 井壁 

分 类 号：TU528.041[建筑科学—建筑技术科学]