Open Access

ARTICLE

Corrosion Performance of Stainless Steel Reinforcement in the Concrete Prepared with Seawater and Coral Waste and Its Ecological Effects

Xingguo Feng^1,2,3, Yiji Zhang¹, Xiangyu Lu^1,*, Yiwen Xu¹, Leyuan Zhang¹, Chao Zhu¹, Tong Wu¹, Yashi Yang⁴, Xuhui Zhao⁵

1 Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing, 210098, China
2 State Key Laboratory of Green Building Materials, Beijing, 100024, China
3 Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
4 College of Water Conservancy Engineering, Wanjiang University of Technology, Maanshan, 243000, China
5 School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China

* Corresponding Author: Xiangyu Lu. Email:

Journal of Renewable Materials 2020, 8(5), 513-534. https://doi.org/10.32604/jrm.2020.09549

Received 30 December 2019; Accepted 23 March 2020; Issue published 29 April 2020

Abstract

Durability and ecological effects of the stainless steel reinforced coral waste concrete were compared with those of the carbon steel reinforced ordinary concrete. The results showed that the corrosion current densities of the stainless steel in the coral waste concrete were less than one-tenth of those of the carbon steel in the same grade ordinary concrete. The stainless steel in the seawater coral waste concrete maintained passivation even after more than two years of immersion in 3.5% NaCl solution, while the carbon steel counterparts in the ordinary concrete were seriously corroded under the same condition. Simultaneously, the corrosion current density of the stainless steel reinforcement decreased slightly with the strength grade of the coral waste concrete. The ecological evaluation indicated that the non-renewable energy consumption and CO₂ emission of per cubic meter of the newly constructed stainless steel reinforced coral waste concrete were 23.72% and 1.419% less than those of the carbon steel reinforced ordinary concrete with the same grade, while the aforementioned two parameters of the former material were reduced by 44.81% and 32.0% in comparison to the latter one in 50 years duration.

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