Research on compressive strength of frozen sand-silty clay mixed soil with different mixture ratios
HUO Haifeng1，CHEN Ruiqing1，LEI Huayang2，LI Haonan1，LIU Zhuangzhuang1
(1. School of Airport Engineering，Civil Aviation University of China，Tianjin 300300，China； 2. School of Civil Engineering，Tianjin University，Tianjin 300072，China)
Abstract：In order to study the influence of different mixture ratio on compression strength of sand-silty clay mixed soil，the unconfined compressive tests were conducted on frozen soil samples by means of controlling variables. The experiments indicate that different silty clay contents has remarkable influence on the unconfined compressive strength of frozen soil. Inhabitation of ice and appearance of cohesion，both contributed from increasing of fine soil， mutually interact and determine the strength. Once the ice in pore space fails to combine to a unit，the strength would drop dramatically. Meantime，the maximum unconfined compressive strength can be obtained when clay content is 60% and water content is16%. If the content is below the optimum content，the strength of the frozen soil continuously increases with the content increasing. Otherwise，the strength of the frozen soil gradually reduces with the content increasing. Moreover，the optimum clay content and water content will decrease when dry density increases. Finally，a reduction of unconfined compressive strength，47%，is captured for the mixed soil after 20 freeze-thaw cycles.
霍海峰1，陈瑞青1，雷华阳2，李浩男1，刘壮壮1. 不同配比砂–粉黏混合料冻后抗压强度试验研究[J]. 岩石力学与工程学报, 2016, 35(S2): 4249-4255.
HUO Haifeng1，CHEN Ruiqing1，LEI Huayang2，LI Haonan1，LIU Zhuangzhuang1. Research on compressive strength of frozen sand-silty clay mixed soil with different mixture ratios. , 2016, 35(S2): 4249-4255.
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2016, Vol. 35 
