文献类型：期刊文献

英文题名：Chloride transport and induced steel corrosion in recycled aggregate concrete: A review

作者：Liang, Chaofeng[1,3];Cai, Zhedong[1];Wu, Huixia[1,2];Xiao, Jianzhuang[3];Zhang, Yuming[1];Ma, Zhiming[2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Yangzhou Univ, Coll Civil Sci & Engn, Yangzhou 225127, Jiangsu, Peoples R China;[3]Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China

年份：2021

卷号：282

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000639114300005)、、EI(收录号：20210909996276)、Scopus(收录号：2-s2.0-85101533748)、WOS

基金：The authors gratefully acknowledge substantial support of ongoing projects from the National Natural Science Foundation of China (52008364, 52078358) and Natural Science Foundation for Youths of Jiangsu Province (BK20200957) and Natural Science Foundation of Zhejiang Province (LY20E080012).

语种：英文

外文关键词：Recycled aggregate concrete (RAC); Chloride transport; Steel corrosion; Modification method

外文摘要：Chloride ingress and resulting steel corrosion are the main reasons leading to durability degradation. A body of literature on chloride transport and steel corrosion in recycled aggregate concrete (RAC) is currently available, but a systematic review has been lacking. This paper presents a critical review of chloride transport in RAC, and the induced steel corrosion behaviour and cracking patterns of reinforced RAC are introduced. Related modification methods are further discussed. The results showed that the incorporated recycled aggregate (RA) increased chloride ingress in RAC, and a time-dependent characteristic was observed for the chloride diffusion coefficient. The lower RA properties led to higher chloride ingress in preparing RAC when RA substitution rates were the same; the induced environmental damage accelerated chloride ingress in RAC. Incorporating RA increased the steel corrosion risk and shortened the initial corrosion time of reinforced RAC, and the cracking pattern of reinforced RAC was different from the cracking pattern of reinforced natural aggregate concrete. Removing and enhancing the adhered old mortar of RA improve the properties of RAC, and various modification methods can be employed to improve the resistance to chloride ingress and steel corrosion in RAC. In particular, a CO2-curing treatment, which is eco-friendly, is recommended for improving the RA and RAC properties. The study of chloride ingress and steel corrosion in ultra-high performance RAC and 3D-printed RAC should be a focus in further studies. (C) 2021 Elsevier Ltd. All rights reserved.