Corrosion of steel rebar embedded in UHPC beams with cracked matrix

doi:10.1016/j.conbuildmat.2021.125589

	Corrosion of steel rebar embedded in UHPC beams with cracked matrix
	Fan, Liang 1,2; Teng, Le 3; Tang, Fujian 4; Khayat, Kamal H.3; Chen, Genda 3; Meng, Weina 5
	2021-12-27
发表期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
卷号	313 页码:15
通讯作者	Meng, Weina(wmeng3@stevens.edu)
摘要	Intact ultra-high-performance concrete (UHPC) can properly protect embedded steel rebar from corrosion. However, cracks initiate and propagate in UHPC beams under loading, which will facilitate the corrosion of steel rebar. In this study, UHPC beams made with different steel fiber contents (0.5 vol% and 2.0 vol%) were pre cracked to generate different primary crack widths (0.1, 0.2 and 0.4 mm) on the tensile surfaces. The electrochemical behaviors and corrosion states of steel rebar embedded in these cracked beams were investigated in 3.5 wt% NaCl solution for 174 days. The results indicated that the corrosion rate of steel rebar in UHPC with cracks was reduced with time, and corrosion was not amplified and was restrained within the initially generated corrosion spots. When the primary crack width in UHPC beams was limited to 0.1 mm, steel rebar likely remained in the uncorroded state. Higher content of steel fibers (2%) could provide better bridging effects to reduce the corrosion rate without introducing galvanic corrosion on steel rebar. Besides, the Stern-Geary coefficients B of steel rebar embedded in UHPC beams with cracked matrix are determined to be 13.5 and 14.1 mV for active and passive corrosion, respectively. Also, this paper found the UHPC has low efficiency in autogenous self-healing.
关键词	UHPC Steel rebar Cracked matrix Steel fiber Tafel EIS
DOI	10.1016/j.conbuildmat.2021.125589
收录类别	SCI
语种	英语
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:000721035600006
出版者	ELSEVIER SCI LTD
引用统计	被引频次：19[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/337002/177240
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Meng, Weina
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 3.Missouri Univ Sci & Technol, Dept Civil Architectural & Environm Engn, Rolla, MO 65401 USA 4.Dalian Univ Technol, Sch Civil Engn, State Key Lab Coastal & Offshore Engn, Dalian 116204, Peoples R China 5.Stevens Inst Technol, Dept Civil Environm & Ocean Engn, Hoboken, NJ 07030 USA
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Fan, Liang,Teng, Le,Tang, Fujian,et al. Corrosion of steel rebar embedded in UHPC beams with cracked matrix[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,313:15.
APA	Fan, Liang,Teng, Le,Tang, Fujian,Khayat, Kamal H.,Chen, Genda,&Meng, Weina.(2021).Corrosion of steel rebar embedded in UHPC beams with cracked matrix.CONSTRUCTION AND BUILDING MATERIALS,313,15.
MLA	Fan, Liang,et al."Corrosion of steel rebar embedded in UHPC beams with cracked matrix".CONSTRUCTION AND BUILDING MATERIALS 313(2021):15.

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