Modeling carbonation depth of recycled aggregate concrete containing chlorinated salts

doi:10.1016/j.conbuildmat.2024.136478

IOCAS-IR

	Modeling carbonation depth of recycled aggregate concrete containing chlorinated salts
	Qu, Feng 1; Xia, Wen 1; Sun, Congtao 2; Hou, Hailong 1; Huang, Bo 1; Wang, Gongxun 1; Hu, Song 1
	2024-06-07
发表期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
卷号	430 页码:9
通讯作者	Qu, Feng([email protected])
摘要	The durability of recycled concrete is susceptible to degradation from both chloride salt attack and carbonation when exposed in service environment. The depth of carbonation in recycled concrete subject to chloride salt attack was studied here. This investigation assessed the effects of mineral admixture, replacement rate of recycled coarse aggregate, and quality of recycled coarse aggregate on the carbonation depth. The carbonation depth Recycled concrete was studied through accelerated simulated carbonation in the laboratory for 7d, 14d and 28d. Based on the results, the correlation analysis was conducted to investigate the relationship between depth of carbonation, mineral admixture, recycled coarse aggregate replacement rate, recycled coarse aggregate quality and the presence of chloride ions. The objective of this study was mainly to investigate the effect of internal chloride ions on the depth of carbonation of recycled concrete subjected to chloride salt attack. The study referred to previous academic research on carbonation in recycled concrete that had not been affected by chloride salts, and conducted a comparative analysis to identify the carbonation depth pattern in recycled concrete influenced by chloride salt exposure. The study discovered a negative correlation between the replacement rate of mineral admixture and recycled coarse aggregate and the carbonation resistance of concrete. Moreover, enhancing the quality of recycled coarse aggregate positively impacted the carbonation resistance of concrete. An improved model was developed that considers the effect of internal chloride salts on the carbonation depth of recycled concrete, in reference to the empirical prediction model presently available. The model demonstrated a high level of agreement with experimental outcomes, displaying an error range of between -4.32% and 8.27%. It enables an in-depth comprehension of the carbonation behavior of recycled aggregate concrete in an environment exposed to chloride salt attack. Based on the model, the service life of recycled concrete structures can be more accurately forecasted, which can provide a theoretical direction for enhancing the durability of engineering structure.
关键词	Chloride-containing recycled concrete Mineral admixture Recycled coarse aggregate Carbonation depth Carbonization depth forecast
DOI	10.1016/j.conbuildmat.2024.136478
收录类别	SCI
语种	英语
资助项目	Scientific research project of Hunan Provincial Department of Education[18C0324]; Scientific research project of Hunan Provincial Department of Education[19A0164]; Scientific research project of Hunan Provincial Department of Education[22B0473]; Natural Science Foundation of Hunan University of Science and Technology[E54009]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:001240413400001
出版者	ELSEVIER SCI LTD
WOS关键词	FLY-ASH ; CHLORIDE PENETRATION ; DEMOLITION WASTE ; CONSTRUCTION ; DURABILITY ; BEHAVIOR
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186060
专题	中国科学院海洋研究所
通讯作者	Qu, Feng
作者单位	1.Hunan Univ Sci & Technol, Sch Civil Engn, Xiangtan 411201, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Qu, Feng,Xia, Wen,Sun, Congtao,et al. Modeling carbonation depth of recycled aggregate concrete containing chlorinated salts[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,430:9.
APA	Qu, Feng.,Xia, Wen.,Sun, Congtao.,Hou, Hailong.,Huang, Bo.,...&Hu, Song.(2024).Modeling carbonation depth of recycled aggregate concrete containing chlorinated salts.CONSTRUCTION AND BUILDING MATERIALS,430,9.
MLA	Qu, Feng,et al."Modeling carbonation depth of recycled aggregate concrete containing chlorinated salts".CONSTRUCTION AND BUILDING MATERIALS 430(2024):9.