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《Journal of Glaciology and Geocryology》 2008-03
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Development of the Specimen-Preparing Technique for Remoulded Soil Samples

ZHENG Jian-feng,MA Wei,ZHAO Shu-ping,PU Yi-bin (State Key Laboratory of Frozen Soil Engineering,CAREERI,CAS,Lanzhou Gansu 730000,China)  
The method of preparing soil samples is important to those experiments of soil mechanics.So remoulded soil samples of water-unsaturated or water-saturated made from Lanzhou Loess and Beiluhe Clay are made through different specimen-preparing methods in this paper.Contrasting the dry density and moisture content distributions,it is found that the best method for uniform sample is confirmed.The result shows that samples got by double-end pressing method and little-pressing method are more uniform,the distributions of dry density and moisture content are more regular,and the initial damage of samples are smaller,than those made through slip-consolidation method and layered-bumping method.To the double-end pressing method,the more time pressing,the more uniform samples are.Considering the pressing efficiency,the 8h double-end pressing method is recommended.The higher the clay grain content is,the better the uniformity of the sample is.Therefore,Beiluhe Clay samples can be easierly gotten by double-end pressing method easily.Considering the above factors,it is no doubtful that the method of double-end pressing is just the proper method.
【Fund】: 国家自然科学基金项目(40501016);; 国家自然科学基础人才培养基金冰川学冻土学特殊学科点项目(J0630966)资助
【CateGory Index】: TU411
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