We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The Phase Change Process and Properties of Saline Soil During Cooling.
- Authors
Xiao, Zean; Lai, Yuanming; You, Zhemin; Zhang, Mingyi
- Abstract
Detrimental frost heave and salt expansion may occur in saline soils of cold regions. The severity of these processes depends on the amount of salt precipitation and ice crystal growth in the pore solution at different temperatures. By employing nuclear magnetic resonance, the liquid water fractions in different concentrations of sodium chloride and sodium sulfate saline soils were measured at different temperatures. Based on the theory of solution phase diagram and phase change in porous media, the differences and similarities of phase change between pore solution and free solution were analyzed. The phase change sequence and effects of salt on frozen soils are also discussed. The theoretical and experimental results confirm that the phase diagram can reflect the phase change of pore solutions roughly, and pore size distribution is the cause of differences between the pore solution and free solution. Sodium chloride can mitigate the frost heave of soil, and frost heave and salt expansion occur together when the sodium sulfate soil is frozen.
- Subjects
PHASE transitions; SOIL salinity; COOLING; PRECIPITATION (Chemistry); TEMPERATURE effect; ICE crystal growth
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2017, Vol 42, Issue 9, p3923
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-017-2542-y