Corrosion of steel rebar embedded in UHPC beams with cracked matrix
文献类型：期刊论文
| 作者 | Fan, Liang1,2; Teng, Le3; Tang, Fujian4; Khayat, Kamal H.3; Chen, Genda3; Meng, Weina5 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2021-12-27 |
| 卷号 | 313页码:15 |
| 关键词 | UHPC Steel rebar Cracked matrix Steel fiber Tafel EIS |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2021.125589 |
| 通讯作者 | Meng, Weina(wmeng3@stevens.edu) |
| 英文摘要 | 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. |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000721035600006 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/177239]  |
| 专题 | 海洋研究所_海洋腐蚀与防护研究发展中心 |
| 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 |
| 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. |
入库方式： OAI收割
来源：海洋研究所
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