Solute and water effects on soil freezing characteristics based on laboratory experiments
2015 (English)In: Cold Regions Science and Technology, ISSN 0165-232X, Vol. 115, 22-29 p.Article in journal (Refereed) Published
Laboratory experiments were conducted to study effects of water and solute on soil freezing using TDR and temperature sensor combination methods. ANOVA methods were applied for analyzing significance for solute influences on soil freezing characteristic curve (SFCC). Results showed that higher initial water content influenced the SFCC by increasing liquid water content at the same temperature due to more water connection with soil pores, and adsorbed by soil particles. ANOVA results showed solute content and solute type all had significant effects (P < 0.001 to P < 0.5) on soil freezing processes. And solute in soil resulted in a lower freezing point of soil, which made more liquid water co-exist with ice at negative temperatures. And solute concentration condensing due to liquid water decline would also impede soil freezing processes by decreasing osmotic potential. Due to the physical and chemical process of soil solution, different ions also presented some differences in SFCC parameter estimation. Based on a trial and error method, a prediction model was also built, and it behaved well in predicting SFCC under different water and solute conditions.
Place, publisher, year, edition, pages
2015. Vol. 115, 22-29 p.
Soil freezing characteristic, TDR, Solute-water influences, Osmotic potential, Prediction model
IdentifiersURN: urn:nbn:se:kth:diva-166796DOI: 10.1016/j.coldregions.2015.03.007ISI: 000354144400003OAI: oai:DiVA.org:kth-166796DiVA: diva2:812356
QC 201505182015-05-182015-05-182016-04-04Bibliographically approved