Fig. 8From: Chloride Penetration in Circular Concrete ColumnsRatio of the chloride concentration estimated at the depth of rebars in the concrete matrix (x or \( \rho_{1} \) = 4 cm) C and the chloride threshold concentration for the beginning of the depassivation \( C_{Cr} \) as function of the exposure time t. The horizontal black line indicate the reaching of the threshold chloride, so the beginning of the depassivation of the rebars. (Color figure online).Back to article page