Corrosion and Chloride Diffusivity of Reinforced Concrete Cracked under Sustained Flexure

Authors : Nilüfer ÖZYURT, Tayfun Altuğ SÖYLEV, Turan ÖZTURAN, Ahmet Onur PEHLİVAN, Anıl NİŞ

Pages : 10315-10337

Doi:10.18400/tekderg.430536

View : 9 | Download : 2

Publication Date : 2020-11-01

Article Type : Research Paper

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