In accordance with bearing water pressure and cracking
using test system made up by self-made concrete sample mould
self-made controlled cracking device
self-made controlled water pressure device
and crack width measuring instrument
experiments for permeability of cracked concrete are carried out under the conditions of different water pressures
concentrations of chloride ion
crack widths and soaking times. The experiment results show that chloride ion content of concrete increases significantly with the increasing of water pressure when the other experimental conditions are same; and the migration laws are different; and crack width threshold which is independent of water pressure controls the migration of chloride ion. This method can provide a reference for similar study.