4.6 Article

Dynamic Mechanical Properties and Visco-Elastic Damage Constitutive Model of Freeze-Thawed Concrete

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Summary: This study focused on evaluating the freeze-thaw durability of pervious concrete specimens using the JC446-91 test method, finding that replacing 8% of coarse aggregate with sand and using a higher water to cement ratio resulted in higher strength and improved freeze-thaw durability. While previous research showed a positive effect of air-entraining admixture on freeze-thaw durability, it was not clearly observed in this study. Additionally, changes in coarse aggregate size did not significantly affect the strength and freeze-thaw durability of pervious concrete. The study revealed that the conditions and number of cycles in JC446-91 were inadequate for evaluating freeze-thaw durability, especially for robust mixes, suggesting a need for more compatible and realistic test methods.

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