Effect of Liquid Polymeric and Lime Additives on the Behavior of Fine-Grained Soil at Unfrozen and Freeze–Thaw Conditions

Abstract

Soft fine-grained deposits usually have very low strength and high compressibility and often they must be stabilized. Moreover, they may experience considerable reduction in strength when they subject to freeze–thaw phenomenon in cold regions. This paper study the effect of CBR-Plus liquid polymeric additive on the properties of Tabriz olivaceous fine-grained soil and mixture of this soil with 2.0% lime under unfrozen and freeze–thaw conditions. For this purpose, a series of unconfined compression and freeze–thaw tests were performed on the specimens. It is observed that, in unfrozen condition, CBR-Plus stabilization does not have any significant effect on the soil strength, whereas simultaneously addition of CBR-Plus and lime to the soil gains the strength about 43.65%. In freeze–thaw condition, strength of all samples degrades noticeably, and CBR-Plus stabilized samples experience more reduction than natural ones. Also, the strength of lime-stabilized samples is slightly more than the similar ones including just CBR-Plus. CBR-Plus stabilized samples exhibit proper stability as subjected to freeze–thaw cycles, while addition of CBR-Plus to lime stabilized soil causes incredible decrement in stability of samples.