Abstract: The development of a new prefabricated high pressure formed cement mixing soil column equipment is introduced in this paper. Under a pressure of 25 MPa, the relationship between the cement ratios and the compressive strength of prefabricated cementsoil columns are investigated. The cementsoil block samples with different mixing ratios and the unconfined compressive strength correlations are obtained throughout the regression analysis. The amount of cement, lime and water in the prefabricated high pressure formed cementsoil columns are optimized and the appropriate cementwater ratio range is between 0.4 and 0.7.

Key words: cement-soil columns, high pressure prefabricated cement mixed soil columns, optimized mixing ratio, optimizing tests