Title Laboratory investigation of the freezing point of saline soil
Author Bing Hui; Ma Wei
Author Affil Bing Hui, Chinese Academy of Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, State Key Laboratory of Frozen Soil Engineering, Lanzhou, China
Source Cold Regions Science and Technology, 67(1-2), p.79-88, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date Jun. 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309707
Index Terms freezing; freezing points; grain size; ions; models; salinity; soils; soil temperature; temperature; unfrozen water content; chloride ion; chlorine; halogens; saline soils; sodium chloride; water content
Abstract This paper presents the results from an experimental laboratory investigation study on the freezing point of saline soil. The experiments were a part of a larger laboratory program whose objective is to understand how salt and water content as well as ion sort and type of soil affect the freezing point. Results show that the freezing point decreases with increasing salt content, and increases with increasing water content independent of the kind of soil. The freezing point is also controlled by the amount of soluble salt in the soil water and is influenced by common anions and cations as follows: Cl-->CO32-->SO42-and K+›Na+›Ca2+, respectively. Statistical results show a major fitting curve of freezing point with salt content that fits the exponential damping model except that the salt with chloride ion which agrees more with the linear model with a greater slop. At given water and salt contents, the freezing point of fine particle soils is lower than that of soils with a more coarse particle; however, the effect of the soil particle size on the freezing point decreases apparently with increasing water content.
URL http://hdl.handle.net/10.1016/j.coldregions.2011.02.008
Publication Type journal article
Record ID 65006394