Title Experimental study of the dynamic properties of cement- and lime-modified clay soils subjected to freeze-thaw cycles
Author Liu Jiankun; Wang Tianliang; Tian Yahu
Author Affil Liu Jiankun, Beijing Jiaotong University, School of Civil Engineering, Beijing, China
Source Cold Regions Science and Technology, 61(1), p.29-33, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date Apr. 2010
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309583
Index Terms cements; density (mass/volume); freezing; mechanical properties; soil mechanics; soil strength; soils; soil cement; strength; stresses; thawing; unfrozen water content; cement; cyclic processes; density; freeze-thaw cycles; soil dynamics; stress; triaxial tests; water content
Abstract Modified soils have been used in the recent construction of high-speed railways in northern China due to the lack of good fill material. But the behavior of these modified soils under increased dynamic loading of high- speed train traffic and their long-term performance based on the effects of freeze- thaw cycles have rarely been studied. In this paper, dynamic triaxial tests were conducted on cement- and lime-modified soils with different blend ratios. These soils were subjected to freeze-thaw cycles, and the threshold deviator stress and resilient modulus were studied. The results show that after repeated freeze-thaw cycles, the modified soils exhibit better performance than before modification, the cement-modified clay is superior to the lime-modified clay, and all of the soils' mechanical properties are visibly improved. Moreover, an optimal blend ratio was determined. Also, a critical deviator stress attenuation coefficient, eta f, is introduced to determine the optimal modification method and the appropriate mixture proportions to be used when soils are subjected to freeze-thaw conditions.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.01.002
Publication Type journal article
Record ID 65006525