Evaluation of critical crack width for reinforcement corrosion in RC member based on numerical simulation of transport of chloride ions in concrete

Abstract

Chloride-induced reinforcement corrosion in reinforced concrete structures exposed to marine environment is one of the most important factors affecting the durability of structures. To minimize the effect of cracks on the deterioration of RC structures, current design codes often limit the crack width. However, recent investigations indicated that condition of steel-concrete interface is a more essential criterion related to reinforcement corrosion. The purpose of this study is to clarify the effect of various conditions including cover thickness, water-cement ratio, environment action and interfacial void on limitation of crack width. The validity of crack width limitation in design codes is discussed based on analytical results.