IOCAS-IR  > 海洋环境腐蚀与与生物污损重点实验室
Corrosion of steel rebar embedded in UHPC beams with cracked matrix
Fan, Liang1,2; Teng, Le3; Tang, Fujian4; Khayat, Kamal H.3; Chen, Genda3; Meng, Weina5
2021-12-27
Source PublicationCONSTRUCTION AND BUILDING MATERIALS
ISSN0950-0618
Volume313Pages:15
Corresponding AuthorMeng, Weina(wmeng3@stevens.edu)
AbstractIntact 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.
KeywordUHPC Steel rebar Cracked matrix Steel fiber Tafel EIS
DOI10.1016/j.conbuildmat.2021.125589
Indexed BySCI
Language英语
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000721035600006
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/177240
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorMeng, Weina
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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