A novel freezing point determination method for oil–contaminated soils based on electrical resistance measurement and its influencing factors

The traditional testing methods for freezing point measurement cannot accurately and quickly determine the freezing points of soils with a low water content and/or oil. Therefore, a new measurement method, which is more precise and has less error or deviation, was developed to determine the freezing...

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Bibliographic Details
Published in:The Science of the total environment 2020-06, Vol.721, p.137821-137821, Article 137821
Main Authors: Li, Guo-yu, Zhang, Jun, Zhou, Zhi-wei, Wang, Fei, Chen, Dun, Cao, Ya-peng, Wu, Gang
Format: Article
Language:English
Subjects:
Cold regions
Electrical resistance measurement
Freezing point
Oil pipeline
Oil-contaminated soil
Permafrost
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Summary:The traditional testing methods for freezing point measurement cannot accurately and quickly determine the freezing points of soils with a low water content and/or oil. Therefore, a new measurement method, which is more precise and has less error or deviation, was developed to determine the freezing point of soil and was verified by a series of laboratory tests. Additionally, the effects of oil content, water content, soil type, and dry density on freezing point were investigated. The results show that the water/oil mixing sequence remarkably affects the freezing point of sandy organic silt and lean clay; however, it does not affect the freezing point of poorly graded sand with silty clay. At water contents of
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2020.137821