Effect of cracking on transport properties in concrete

A review is given on the effect of cracking on concrete durability.Inducement of cracking,characteristics of cracking,measurement of cracking and the effect of cracking on transport properties of Cl-,CO2 and water in concrete are presented.The relation between cracking width and transmission rate under different transport mechanism is also discussed,and it is concluded that permeability can be regarded as a comprehensive index of concrete durability.