Abstract：Based on characteristics of concrete in a freezing shaft wall construction and the test of compressive strength of 1, 3, 7, 28 d, the splitting tensile strength and impermeability of concrete with 14 groups of concrete mix proportion, the influence of the amount and type of freezing shaft wall concrete admixture, and the mud content of fine aggregate, the ratio of fly ash and others on high performance concrete were discussed.Experimental result shows that 3 types of concrete admixture can significantly improve the early and the late strength of concrete, especially for the early.The 1d compressive strength of concrete with HNT-1 admixture improved by 145%.The impermeability and compressive strength of concrete were separately decreased by about 60% and 30% along with the mud content in fine aggregate changed from 0% to 5%.The addition of fly ash can significantly reduce the early compressive strength of concrete, the maximum reduction of 1 d, 3 d and 7 d compressive strength of concrete is 40.4%, 14% and 7.8%.

Keyword：high performance concrete;concrete admixture;mud content of fine aggregate;fly ash;