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The long-term durability of concrete structures is closely related to the physical properties including the gas permeability and electrical resistivity, and the pore saturation is a determinant factor on the gas permeability and electrical resistivity of structural concretes.This paper reports a recent experimental investigation on the gas permeability and electrical resistivity at different pore saturations for several representative structural concretes.To this purpose, concrete specimens with different pore saturations were prepared through oven-drying and moisture equilibrium procedure.The gas permeability was measured through CemBureau method and the Klinkenberg effect was considered in the regression of apparent gas permeability at different inlet pressures;the electrical resistivity was measured through alternative current method with the minimum electrical current set as 40mA.Then the influence of pore saturation is described through Van Genuchten-Mualem models for gas permeability and electrical resistivity.It is found that the relative gas permeability is not sensitive to the concrete composition while the relative conductivity is rather sensitive to the material w/c ratio.