冻融环境下玻璃纤维再生混凝土性能研究  

Study on Properties of Glass Fiber Recycled Concrete in Freeze-thaw Environment

作　　者：熊小龙 杨文瑞 仵卫伟 黎惠莹 汤智毅 李成炜 全伟杰 XIONG Xiao-long;YANG Wen-rui;WU Wei-wei;LI Hui-ying;TANG Zhi-yi;LICheng-wei;QUANWei-jie(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]东华理工大学土木与建筑工程学院,南昌330013 [2]武汉理工大学交通与物流工程学院,武汉430063

出　　处：《武汉理工大学学报》2023年第3期81-87,共7页Journal of Wuhan University of Technology

基　　金：江西省自然科学基金(20181BAB216027);国家自然科学基金(51178361);江西省教育厅科技项目(GJJ170486);博士启动金(DHBK2017119);江西省交通运输厅科技项目(2017C0002)。

摘　　要：为研究冻融作用下玻璃纤维再生混凝土抗压、劈裂抗拉性能,以冻融循环次数、玻璃纤维掺量为变化参数,对不同玻璃纤维掺量(0,0.5%,1.0%,1.5%)的再生混凝土进行抗压强度、劈裂抗拉强度、扫描电镜(SEM)试验。结果表明:玻璃纤维能改善再生混凝土内部的密实性,提升抗压、劈裂抗拉强度。冻融环境下玻璃纤维对再生混凝土性能的改善效果优于室内环境。当玻璃纤维掺量为1.0%时,抗压、劈裂抗拉强度提升效果最佳,抗压强度在室内环境下可提升11.26%,冻融150次作用下改善效果可达21.3%;劈裂抗拉强度在室内环境可提升13.6%,冻融150次作用下改善效果可以达到29.4%。玻璃纤维体积率为1.0%的再生混凝土破坏时所需耗能最高。In order to study the compressive and splitting tensile properties of glass fiber regenerated concrete under freeze-thaw action,using the number of freeze-thaw cycles and glass fiber content as changing parameters,the compressive strength,splitting tensile strength and scanning electron microscopy(SEM)tests were carried out on the regenerated concrete mixed with glass fiber(0,0.5%,1.0%,1.5%).The results show that glass fiber can improve the inner compactness of recycled concrete and increase the compressive and splitting tensile strength.The improvement effect of glass fiber on the performance of recycled concrete in freeze-thaw environment is better than that in indoor environment.When the glass fiber content is 1.0%,the compressive strength and splitting tensile strength improve best.The compressive strength increases by 11.26%in indoor environment,and the improvement effect reaches 21.3% under 150 freezing and thawing conditions.The splitting tensile strength can be increased by 13.6%in indoor environment,and the improvement effect can reach 29.4% under 150 times of freeze-thaw action.The energy consumption of recycled concrete with 1.0%glass fiber volume ratio is the highest when it is destroyed.

关 键 词：冻融循环 玻璃纤维 再生混凝土 抗压强度 劈裂抗拉 

分 类 号：TU375[建筑科学—结构工程]