Abstract：
Through the concrete after freeze-thaw damage, mechanical properties, pore feature parameters and relative dynamic elastic modulus, strength index research analysis found that: with the increase of freeze-thaw cycles, the relative dynamic elastic modulus of concrete and strength will reduce gradually, the quality will gradually decline, mechanical damage; After 2 times water freezing and thawing, the aperture parameters of concrete is bigger than the growth of fresh water freezing and thawing; With the increase of curing time, concrete aperture parameters of coming down. At the same time, this article suggested from adding air-entraining agent, pay close attention to paste quality, improve interfacial transition zone of the three aspects, to reduce the freeze-thaw cycle on the performance of concrete damage.
