Chloride ions have been identified as an important cause of the
initiation and acceleration of the corrosion of the reinforcements
within modern concrete structures. This book introduces a comprehensive
mathematical model used to describe the mass transport behavior of ionic
species in porous media. It takes account most of the major mass
transport mechanisms that involved. They are the convection with pore
solution, the diffusion in pore solution, the physical/chemical
adsorption/desorption on/off the solid phase of porous media and the
dynamic electrochemical interactions within the local electrical field
generated. The developed mathematical model has subsequently been
adopted to model the chloride ingress process in the concrete under
saline environmental conditions for the purpose of the service life
assessment and the chloride removal process of the concrete under
electrochemical treatment for concrete rehabilitation. This mathematical
model and numerical methods described in this book can also be used for
other environmental problems and engineering applications, such as
underground pollutant disperse and land contamination modelling.