Multi-Scale Investigation on Concrete Prepared with Recycled Aggregates from Different Parent Concrete

查看全文 作　　者：Zhenhua [1]Duan;Nv [1]Han;Amardeep [1]Singh;Jianzhuang [1]Xiao

机构地区：[1]Department of Structural Engineering,Tongji University,Shanghai,200092,China

出　　处：《Journal of Renewable Materials》索引2020年第8卷第11期,共16页

基　　金：This research was funded by the National Natural Science Foundation of China[Grant Number 51708419]. 摘　　要：Recycled aggregates(RA)are frequently obtained from various unknown sources,which caused variation in properties among recycled aggregates concrete(RAC).This paper investigated the macro and microscopic properties of RAC prepared with RAs originated from different parent concretes with 90-day strength ranging from 30 MPa to 100 MPa.These parent concretes were prepared in advance and crushed to produce RA of distinct qualities.The attached mortar content can reach up to 69%in the concrete with highest strength grade.The microscopic investigation on different RAC was conducted with the X-ray Micro-Computed Tomography scanning technique and image process.Experimental results showed that the properties of RA derived from various parent concrete varied because of the amount of residual mortar.The development of mechanical properties and chloride-ion penetration of RACs all followed a binomial trend with the strength grades of the parent concrete because of the different quantity and quality of RAs. 关键词：Recycled aggregate recycled aggregate concrete parent concrete mechanical property CT scanning image process

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Multi-Scale Investigation on Concrete Prepared with Recycled Aggregates from Different Parent Concrete

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