Moisture

This research established a method to quantify corrosion parameters like potential, current density, and Tafel slopes for rebar in simulated conditions. It examined how depassivation duration, chloride concentration, carbonation, and humidity affect these parameters. Notably, in partially saturated mortar, no distinct threshold was found for critical chloride content, and humidity significantly influenced depassivation indicated by shifts in corrosion parameters.

This study investigates the impact of cracks on water flow in concrete. It examines both artificial and natural cracks of varying widths (0.3 mm and 1.0 mm) under wetting and drying conditions. The Time Domain Reflectometry technique is used to monitor water content evolution around the cracks, revealing that all types of cracks behave similarly to open surfaces exposed to environmental elements.

The study focused on understanding the effects of cracking on transport characteristics under wetting and drying cycles. It involved examining the infiltration properties of natural and artificial cracks, monitoring saturation conditions, and employing numerical simulations to model saturation evolution. Results showed increased permeability and a complex water saturation pattern in cracked concrete, with significant findings on water flow simulation, material properties, and hysteresis in the Van Genuchten parameters. The study suggests different modeling approaches for accurately representing cracks in various scenarios.

This study investigates the role of chloride ion penetration in cracked structures. It addresses chloride ingress in both pre-cracked and cracked concrete, demonstrating the significant impact of cracks on chloride penetration, and models moisture and chloride movement under severe conditions.