粉煤灰掺量对C45自密实混凝土强度的影响  

Influence of fly ash on strength of C45 self-compacting concrete

作　　者：魏江涛 谢帮华[1] 李秋香[1] 赵江倩[1] 宋广春 章攀 WEI Jiangtao;XIE Banghua;LI Qiuxiang;ZHAO Jiangqian;SONG Guangchun;ZHANG Pan(School of Civil and Architectural Engineering,Nanchang Institute of Technology,Nanchang 330099,China;Yaohu College,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]南昌工程学院土木与建筑工程学院,江西南昌330099 [2]南昌工程学院瑶湖学院,江西南昌330099

出　　处：《南昌工程学院学报》2021年第3期33-36,101,共5页Journal of Nanchang Institute of Technology

基　　金：南昌工程学院研究生创新计划项目(YJSCX20190016);江西省教育厅科学技术研究项目(GJJ161120);大学生创新创业训练计划项目(201702);中清大装配式建筑有限公司横向项目。

摘　　要：为了研究粉煤灰对自密实混凝土抗压性能的影响,配置C45自密实混凝土,水灰比为0.35,粉煤灰掺入量为0%~40%。研究发现,粉煤灰的掺入对混凝土抗压强度影响较大,随着粉煤灰的增加,强度呈现先增加后减小的趋势;随着龄期增长,混凝土抗压强度呈增长趋势,且粉煤灰掺入量为25%时抗压强度最优,达到60.7MPa;得到了C45自密实混凝土的龄期强度模型。In order to study the influence of fly ash on compressive properties of self-compacting concrete,C45 self-compacting concrete is configured with a water-cement ratio of 0.35 and fly ash content of 0%~40%.It is found that the incorporation of fly ash has a great impact on the compressive strength of concrete.With the increase of fly ash,the strength first increases and then decreases.With the increase of age,the compressive strength of concrete shows an increasing trend,and when the fly ash content is 25%,the compressive strength is the best,reaching 60.7 MPa.The model of C45 self-compacting concrete strength is obtained.

关 键 词：粉煤灰 自密实混凝土 C45混凝土 抗压强度 

分 类 号：TU528.59[建筑科学—建筑技术科学]