Chloride-induced corrosion of reinforcement is a major problem for concrete durability in
a salt-laden environment . For a concrete with negligible amount of initial chloride
inherited at the construction stage , the gradual buildup of the required amount of chloride
to initiate corrosion of reinforcement takes place predominantly through diffusion of
chloride ions from external sources under a concentration gradient . Consequently,
diffusion of chloride ions in concrete has received a great deal of interest. Most of the
researchers have modeled the chloride ingress by Fick' s law of diffusion, advocating its
general applicability to concrete.