Corrosion and Chloride Diffusivity of Reinforced Concrete Cracked under Sustained Flexure

Year 2020, Volume: 31 Issue: 6, 10315 - 10337, 01.11.2020

Nilüfer Özyurt , Tayfun Altuğ Söylev , Turan Özturan , Ahmet Onur Pehlivan , Anıl Niş

https://doi.org/10.18400/tekderg.430536

Cited By: 5

Abstract

This research discusses the chloride diffusivity of concrete as well as corrosion performance of rebars in cracked and uncracked states. Prismatic concrete specimens with two water-to-cement ratios, two concrete cover thicknesses with and without steel fibers were used. Three-point flexural loading was applied to form cracks and cracks were sustained by a bolt system. Half-cell potential and corrosion rate measurements were carried out following wetting - drying cycles in chloride environment which were continued for 80 weeks. The positive effects of lower water-to-cement ratio and greater cover depth were found to be surpassed by existence of cracks in concrete.

Keywords

Corrosion, cracked concrete, corrosion rate, chloride profiles, diffusion coefficient, fibers, sustained crack width, sustained flexure

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