Abstract:Gel,as the product of chemical reaction,can cement soil particles. The characteristics of gel can be used to consolidate soil,which is named as soil chemical consolidation. Chemical consolidation can improve structural state of loess,increase its bearing capacity,and improve its original engineering geological properties,namely settlement by soaking,disintegration and higher compression. In this paper,the consolidation mechanism of LD serial rock-soil cemedin developed by Lanzhou University is introduced. The optimization test of strength,disintegration test and frost-resistance test are conducted on loess consolidated by LD serial rock-soil cemedin to analyze its engineering geological characteristics. The major factors that influence the strength of consolidated loess are also studied. The test results show that loess consolidated by LD serial rock-soil cemedin agent (especially LD-3# and LD-4# rock-soil cemedin) is of better physico-mechanical property and greater frost- resistant ability than pure loess. It can be concluded that LD serial rock-soil cemedin is a kind of ideal cemedin.