Abstract：Since different detection methods of concrete permeability have both advantages and disadvantages，the study of the
correlation between several permeability indexes has become a trend. This paper dicusses the correlation between the durability
indexes of charge passed and air permeability coefficient of the mineral admixture modified concrete，and the relation between
the amount of chloride-ion migration and charge passed by ASTM C1202 Method and Cembureau Method. The results indicate
that: the linear correlations between charge passed and gas permeability coefficient, and the amount of chloride-ion migration
were found to be significant. The chloride-ion migration amount （Decrement of chloride-ion in cathode cell，Increment of
chloride-ion in anode cell, Chloride penetration depth） can be considered as one quantitative indexes of concrete permeability
while it is not proper to directly measure the chloride permeability of concrete only by charge passed. In addition, the
micro-crack induced by drying will cause the charge passed improved obviously.