回弹料再生混凝土的耐久性能研究  

Durability performance of recycled concrete with shotcrete rebound material

作　　者：曾建国 黄靓[2] 李东明 周章涛 赵鹏鹏 吕召宁 张少龙 ZENG Jianguo;HUANG Liang;LI Dongming;ZHOU Zhangtao;ZHAO Pengpeng;LU Shaoning;ZHANG Shaolong(China State Construction Railway Investment and Engineering Group Co.,Ltd.,Beijing 102601,China;Department of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]中建铁路投资建设集团有限公司,北京102601 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《混凝土》2025年第3期133-137,141,共6页Concrete

摘　　要：为研究回弹料再生混凝土(SRM-RFAC)的耐久性能,以喷射混凝土回弹料再生细骨料(SRM-RFA)取代率和粉煤灰(FA)取代率为变量,进行了抗水渗透试验、抗氯离子渗透试验以及微观试验.结果表明:SRM-RFAC的抗水渗透性能和抗氯离子渗透性能随SRM-RFA取代率的提高而降低,随FA取代率的提高而提高;拟合了SRM-RFAC抗水渗透系数和氯离子扩散系数的计算式,计算值与试验结果吻合度良好,通过X-射线衍射(XRD)、扫描电镜(SEM)试验分析了造成SRM-RFAC耐久性能改变的原因。To investigate the durability performance of shotcreterebound materialrecycled fine aggregate concrete(SRM-RFAC),durability tests including anti-water permeability,anti-chloride ion permeability,and microstructure analysis were conducted with varying replacement rates of shotcretere bound material recycled fine aggregate(SRM-RFA)and fly ash(FA).The results indicated that the anti-water permeability and anti-chloride ion permeability of SRM-RFAC decreased with an increase in SRM-RFA replacement rate and increased with an increase in FA replacement rate.The formulas for SRM-RFAC′s water resistance permeability coefficient and chloride ion diffusion coefficient were fitted,and the calculated values were in good agreement with the experimental results.Through analyses using X-ray Diffraction(XRD)and Scanning Electron Microscopy(SEM),the factors contributing to changes in the durability performance of SRM-RFAC were identified.

关 键 词：再生混凝土 喷射混凝土回弹料 耐久性能 抗水渗透性能 抗氯离子渗透性能 

分 类 号：TU528.07[建筑科学—建筑技术科学]