Type
ArticleKAUST Department
Earth Science and Engineering ProgramEnergy Resources and Petroleum Engineering
Upstream Petroleum Engineering Research Center (UPERC)
Date
2015-12-14Online Publication Date
2015-12-14Print Publication Date
2016-10Permanent link to this record
http://hdl.handle.net/10754/621651
Metadata
Show full item recordAbstract
The salt concentration gradually increases at the soil free surface when the evaporation rate exceeds the diffusive counter transport. Eventually, salt precipitates and crystals form a porous sodium chloride crust with a porosity of 0.43 ± 0.14. After detaching from soils, the salt crust still experiences water condensation and salt deliquescence at the bottom, brine transport across the crust driven by the humidity gradient, and continued air-side precipitation. This transport mechanism allows salt crust migration away from the soil surface at a rate of 5 μm/h forming salt domes above soil surfaces. The surface characteristics of mineral substrates and the evaporation rate affect the morphology and the crystal size of precipitated salt. In particular, substrate hydrophobicity and low evaporation rate suppress salt spreading.Citation
Dai S, Shin H, Santamarina JC (2015) Formation and development of salt crusts on soil surfaces. Acta Geotechnica 11: 1103–1109. Available: http://dx.doi.org/10.1007/s11440-015-0421-9.Sponsors
This work has been supported by the Goizueta Foundation and US Department of Energy. Constructive comments from two anonymous reviewers have greatly improved this manuscript.Publisher
Springer NatureJournal
Acta Geotechnicaae974a485f413a2113503eed53cd6c53
10.1007/s11440-015-0421-9