Research of Freezing Resistance and its Mechanism of Concrete in Different Mixture Ratio under Chlorion Condition

Through freeze-thaw test in chloride condition,infiltration test of chlorion in concrete and mortar,and through distribution test of fine holes in mortar,the freezing resistance and its mechanism of concretes in various mixture ratio was researched.The factors of mixture ratio include:water-cement ratio from 30% to 90%,air quantity from 1% to 7.5%,and the additions of blast furnace slag(GGBFS)and silicon fly(SF)was applied.The influences of these factors on durability of concrete is clear.Reduce the water-cement ratio,proper quantity of air and additions,can raise the freezing resistance of concrete effectively.