Through the three-point bending test on the notched beams and single axial compression test on prismatic specimens of concrete after wet-dry cycle of sulfate solution,the effects of wet-dry cycle of sulfate solution upon the fracture toughness and mechanical parameters of concrete were studied.The results show that wet-dry cycle of sulfate solution has significant influences on compressive strength,elastic modulus and fracture toughness of concrete.The compressive strength,elastic modulus and fracture toughness of concrete decrease as wet-dry cycle times increase.Based on the test results,the damage function and loss rate formula of fracture toughness are established and are helpful to analyze the damage characteristic and predict fracture toughness of concrete after wet-dry cycle of sulfate solution.
维普
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