The water permeability coefficient is an important indicator for evaluating the durability of concrete.In order to clarify the in-fluence of various experimental variables on the water permeability coefficient of concrete,the stable permeability method is used to sys-tematically explore the effects of water-cement ratio,aggregate content and curing age on the water permeability coefficient.It has found that as the aggregate content increases,the water permeability coefficient of concrete gradually decreases.Once the aggregate content ex-ceeds 50％,the permeability coefficient begins to increase due to the influence of the permeability threshold.When the water-cement ratio changes from 0.3 to 0.5,the water permeability coefficient of concrete will significantly increase with the increase of the water cement ra-tio.Within the curing age of 28 d,the water permeability coefficient of concrete significantly decreases with the increase of curing age.
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