In this experiment,the short-term frost resistance of concrete mixed with expansive compound mineral admixture is studied.

Study on increasing the freeze-resistance of Lactobacillus bulgaricus;

Evaluation of the study on the test method about the frost resistance of concrete and the appraising parameter;

Effect of high-frequency vibration on concrete frost resistance;

Effect of polyacrylonitrile fiber on frost resistance of air-entrained concrete;

In this paper,the frost resistance of recycled concrete with antifreeze and the effect on the quality when it was maintained in sub-zero temperature were discussed.

The result is that between 5%~10%,the effect of rice hull powder on early compressive strength and early rupture strength of concrete is little and later is obvious;the rice hull powder can improve the frost resistance and impermeability of C30 concrete,8% is especially obvious.

Through the frost resistance test on the fly ash added with different solidifying ag.

Relationship between frost resistance and freezing resistance of winter wheat;

The monoester phosphate starch can improve the freezing resistance of quick freeze boiled dumpling and stuffed dumpling.

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.