The Effect of Concrete Cracks on Chloride Erosion

To explore the effect of concrete cracks on chloride erosion, different dry-wet cycle immersion experiment for bending cracking component is designed. The chloride content in concrete is tested by using the method of RCT in simulated marine environment. It is showed that the chloride convection diffusion zone depth in the cracking component is between 15mm and 25mm. The chloride erosion process is accelerated by macro-cracks. According to experiment result, a new chloride time-dependent diffusion model is put forward, considering crack width and effective diffusion coefficient. It is found that the chloride concentration is increased with the increase of crack width, approaching to the saturated concentration.