Abstract: The physical and mechanical properties and durability properties of the geopolymer blend cement(GBC) concrete and the ordinary Portland concrete(OPC) are compared in laboratory experiments.Results show that the GBC concrete has lower dry shrinkage and higher anti-crack property than that of OPC,that the GBC mortar has better resistance to sulfate attack,and that the GBC concrete has excellent ability to resist erosion of chloride ion with a low diffusion coefficient.The effective diffusion coefficient of water-solubility chloride ion in GBC concrete is 17% of that in the OPC.