【摘要】 为了研究混凝土的抗冻耐久性,采用慢冻法对普通混凝土试件、掺2%防冻剂的混凝土试件和掺4%防冻剂的混凝土试件进行了冻融循环试验。每个试件共进行20次冻融循环试验,每次冻融循环后均测定每个试块的质量,全部冻融循环结束后对每一试块的抗压强度都进行了测定。在此基础上对3种试件质量随冻融时间变化的规律及防冻剂的掺量对混凝土抗冻耐久性的影响进行了分析,结果表明:3种试件的质量随冻融时间的延长均呈下降趋势,掺4%防冻剂的混凝土试件的抗冻耐久性最好。更多还原

【Abstract】 In order to study the durability of concrete resistance to freezing this test of freezing and thawing cycle were conducted to ordinary concrete specimens,and concrete spcimens include 2% and 4% anti-freezing mixture respectively by slow freezing method. Every specimen carry through 20 times freezing and thawing cycles, the weight of each specimen was measured after each freezing and thawing cycles, in the end of whole freezing and thawing cycles, compression strength of every specimen were measured. On the basis of these measuring results ,this paper analyse the changing law of the three kinds of specimen weight with freeze-thaw time and the effect of the anti-freezing mixture on durability of concrete.The analysis result indicates that the weight of three kinds of specimen take on decline trend with time alteration,and the durability of resisting freezing of the specimen with 4% anti-freezing mixture is the best.更多还原