The effect of Dead Sea salt solution on the engineering properties of expansive subgrade clayey soil

Dead Sea salt, a benign chemical material vastly available in Jordan, could be used to improve the characteristics of expansive subgrade soil and to reduce carbon dioxide emissions resulting from traditional stabilizers such as cement. To achieve this purpose, expansive clayey soil obtained from Al-...

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Bibliographic Details
Published in:Arabian journal of geosciences 2020-06, Vol.13 (11), Article 405
Main Authors: Al Hattamleh, Omar, Aldeeky, Hussein, Rabab’ah, Samar, Taamneh, Madhar
Format: Article
Language:English
Subjects:
Additives
Carbon dioxide
Carbon dioxide emissions
Clay
Clay soils
Compressive strength
Cycles
Dry density
Drying
Earth and Environmental Science
Earth science
Earth Sciences
Engineering
Expansion
Expansive clays
Moisture content
Original Paper
Properties
Saline solutions
Salts
Soil
Soil moisture
Soil stabilization
Soils
Stabilizers
Water content
Wetting
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Summary:Dead Sea salt, a benign chemical material vastly available in Jordan, could be used to improve the characteristics of expansive subgrade soil and to reduce carbon dioxide emissions resulting from traditional stabilizers such as cement. To achieve this purpose, expansive clayey soil obtained from Al-Azraq Basin in the eastern part of Jordan was treated by mixing it with a Dead Sea salt solution. Results showed that using Dead Sea salt as a solution additive, the plasticity index (PI), free swell (FS), and optimum moisture content (OMC) decreased. On the other hand, the maximum dry density (MDD) and the unconfined compressive strength (UCS) noticeably increased, continuing to strengthen with increased curing time. Additionally, with wetting-drying cycles to OMC, FS was reduced, reaching equilibrium value with fewer cycles. However, with the wetting-drying cycles to shrinkage limit, FS slightly increased. In conclusion, using Dead Sea salt as a stabilization additive markedly enhanced the engineering properties of the expansive clay used as subgrade soil.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-020-05364-0