Title: Degradation in Durability of Magnesium Oxychloride- Coated Reinforced Steel Concrete

Author(s): Wang Penghui, Qiao Hongxia, Feng Qiong, and Cao Hui

Publication: Materials Journal

Volume: 117

Issue: 2

Appears on pages(s): 33-41

Keywords: Clayton-Copula function; corrosion current density; durability degradation; solution immersion acceleration test

DOI: 10.14359/51720298

Date: 3/1/2020

Abstract:
Because of ordinary reinforced concrete’s poor durability in saline soil areas and Qinghai Salt Lake, magnesium oxychloride-coated steel-cement concrete was adopted in this area. The process of the degradation of coated steel bars’ durability was evaluated according to the actual service situation of magnesium-oxychloridecoated reinforced concrete in saline soil areas and Qinghai Salt Lake. The corrosion parameters of coated steel bars in magnesium oxychloride cement concrete were obtained by the accelerated immersion and natural corrosion tests in a drying environment. Using the Copula function as the connection function, the corrosion current density of the coated steel obtained by accelerated tests and natural rust tests was adopted as the degradation factor of the edge distribution function. The results demonstrated that the Clayton-Copula function reflects the actual process of the degradation in durability of coated steel bars well, and the coated steel bars reached a severe state of corrosion at 18,250 days.