Taking 0.38 water-binder ratio concrete as the test object,the compressive strength,mass loss,dynamic modulus of elasticity and nuclear magnetic resonance tests were carried out respectively,and the changes of mechanical properties and pore structure of concrete at different initial erosion ages were studied,and the prediction model of elastic modulus was established.The research shows that the compressive strength,quality and dynamic modulus of elasticity of concrete under sulfate attack show a trend of increasing first and then decreasing,and the later the initial erosion age is,the greater the compressive strength and dynamic modulus of elasticity are,the more the loss of strength and dynamic modulus of elasticity is,and the prediction model of elastic modulus is established.The change law of concrete porosity and pore size distribution was studied.
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