中文摘要：

以质量分数为3%的氯化钠和5%的硫酸钠混合溶液为侵蚀介质,采用慢冻法,对立方体抗压强度为54.7 MPa的混凝土试件进行0,100,200,300次冻融循环试验,并测定各组试件的质量损失、抗压强度、相对动弹性模量和应力、应变等试验数据。结果表明：随着冻融循环次数的增多,混凝土试件表面剥蚀加剧,表观质量和相对动弹性模量无明显变化,抗压强度及弹性模量均有大幅降低。当冻融循环为300次时,抗压强度和弹性模量分别下降了26%和35.1%。

英文摘要：

With mass fraction of 3% sodium chloride and 5% sodium sulfate mixed solution as aggressive medium,by adopting slow freeze-thaw method,freeze-thaw tests of freeze-thaw cycles of being 100,200 and 300 were carried out on concrete specimens.The cubic compressive strength was 54.7MPa.The mass loss,compressive strength,relative dynamic modulus,strain and stress were tested.The results show that with the increase in freeze-thaw cycles,increased erosion of concrete specimen surface and the apparent quality and relative dynamic modulus did not change significantly when both of compressive strength and elastic modulus decreased a lot.Compressive strength and elastic modulus decreased by 26% and 35.1% after 300 freeze-thaw cycles.