Modeling of chloride ions penetration in cracked concrete structures exposed to marine environments

Abstract

The degradation caused by corrosion of rebar in concrete structures is one of the most important issues to attract the attention of researchers focused on concrete durability. Penetration of chloride ions into concrete is one of the factors that can contribute to corrosion of rebar and consequently the strength of concrete structures as well as serviceability reduction. In this study, an experimental model was proposed to predict penetration of chloride ions into cracked concrete by performing non‐destructive tests. Tests were performed after 48‐months exposure of all samples to a harsh marine environment. For studying the influence of load‐induced cracks on the rebar corrosion, cracked and uncracked beams were tested. Results of this study demonstrated that by the increment of the crack width, corrosion of reinforcement increased and as a result, the probability of degradation of reinforced concrete beams increased accordingly. Furthermore, by the increment of crack width, their depth also increased which caused enhancement of crack depth on the rebar and easier access of chloride ions to the rebar.

Time‐dependent model and life prediction for reinforcement corrosion in magnesium oxychloride cement concrete

“…Based on References 44–52, our studies established the time‐dependent model for reinforcement corrosion in MOCC and predict the MOCC structure service life. The time‐dependent model and life prediction for reinforcement corrosion in MOCC are the highlights of this paper.…”

“…There are many basic time-dependent models for reinforcement corrosion in concrete before the concrete cracks, for example, Vu and Stewart, Yalcyn and González model, andso on 22,[44][45][46][47][48][49][50][51][52] ; however, only three representative models were selected in this paper.…”

Tackling the issues of self‐compacting concrete containing high volume of waste glass aggregate by zeolite

“…To investigate the durability, electrical resistivity measurement techniques are much easier and faster compared to the so called rapid chloride permeability test (RCPT) and there is a nonlinear relationship between their results 34 . The electrical resistivity test indirectly measures porosity of microstructure and the ability of water‐saturated concrete to resist the transfer of ions 58 …”

Investigation of the Mechanical, Microstructure and 3D Fractal Analysis of Nanocalcite-Modified Environmentally Friendly and Sustainable Cementitious Composites

“…Cementitious materials perform a necessary part in the construction sector and are therefore of paramount importance to improve their durability and mechanical characteristics [1][2][3][4][5]. Because of recent characterization technology progress, the characteristics of all these synthetic structures may be examined on a variety of length scales ranging from nano to macro [6][7][8].…”