ABSTRACT
Many researchers have studied Cd and noticed that it varied within a broad range. They expressed Cd with three different forms: free chloride concentration (in pore solution), water soluble chloride contents (by the mass of binder), and total chloride concentration (by the mass of binder). The use of a single value instead of actual concentrations may result in significant error in calculated Dnssm and Dapp, the kinetics of chloride penetration process and chloride corrosion risk assessment of existing concrete structures.
