ABSTRACT
This chapter presents three items of importance for predicting chloride ion equilibrium, transport and steel corrosion in concrete. First, thermodynamic states of chloride are discussed with ionized, solid-phase and adsorbed chlorides, and state equations in micro-pores presented in Chapter 3 are formulated for ordinary Portland and mixed cement with pozzolans. Second, a chloride ion transport model is proposed for both sound and cracked concrete, which is linked with Chapter 9 and Chapter 10, along with the nonlinear chloride-binding model in a thermodynamic coupled system. Third, a unifi ed corrosion model is presented for steel reinforcement throughout the life of concrete structures based on an electro-chemical thermodynamic approach, and this model is coupled with structural performance assessment discussed in Chapters 8-10.
