Institutional Repository of Key Laboratory of Marine Environmental Corrosion and Bio-fouling, IOCAS
| 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 Publication | CONSTRUCTION AND BUILDING MATERIALS
 |
| ISSN | 0950-0618 |
| Volume | 313Pages:15 |
| Corresponding Author | Meng, Weina(wmeng3@stevens.edu) |
| Abstract | 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. |
| Keyword | UHPC Steel rebar Cracked matrix Steel fiber Tafel EIS |
| DOI | 10.1016/j.conbuildmat.2021.125589 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Construction & Building Technology ; Engineering ; Materials Science |
| WOS Subject | Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000721035600006 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Meng, Weina |
| Affiliation | 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 |
| First Author Affilication | Institute 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 1-s2.0-S095006182103（14685KB） | 期刊论文 | 出版稿 | 延迟开放 | CC BY-NC-SA | View 2023-7-1后可获取 | |
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