Study of the microstructure of collapsible soil treated with the potassium chloride
Abstract
The collapse of soils is a very complex phenomenon that involves a large number of intrinsic and environment parameters. This research aims to try to better understand the causes of collapse of soils and propose solutions to improve them and limit subsidence at least to an acceptable level. From a soil sample reconstituted in the laboratory, composed of a mixture (80% sand and 20% kaolin), we have shown the benefit of additions of salt solutions such as KCl. Analyses with scanning electron microscope and spectroscopy energy dispersive X-ray revealed microstructural changes and a significant interaction between clay particles and potassium chloride. The K+ cation is easily embedded in the pores and promotes the formation of a dense and compact material.References
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Delage, P., M. Audiguier, Y.J. Cui, M.D. Howat (1996) Microstructure of compacted silt Canadian Geotechnical Journal, 33(1) : 150-158.
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Lawton, E.C., R.J. Fragaszi, H. James (1989) Collapse of compacted clayey sand. Journal of Geotechnical Engineering, 115(9) : 1252-1267.
Tessier, D., J. Berrier (1979) Utilisation de la microstructure électronique à balayage dans l’étude des sols. Observations des sols humides soumis à différents pF. Science du Sol 1: 67-82.
Abbeche, K., O. Bahloul, T. Ayadat, A. Bahloul (2010) Treatment of collapsible soils by salts using the double consolidation method. Experimental and Applied Modeling of Unsaturated Soils, Geotechnical Special Publications, ASCE 10.1061/41103(376)10, GeoShanghai, pp. 69-78.
Ayadat, T., A.Gherabli (1995) Traitement d’un sol affaissable par du ciment CPA. Annales de l’Institut Technique du Bâtiment et des Travaux Publics, France, No. 530 : 34-44.
Ayadat, T., B. Belouahri, R. Ait Ammar (1998) La migration des particules fines comme approche d'explication du mécanisme de l'effondrement des sols. Revue Française de Géotechnique 83:73-81.
Bahloul, O., K. Abbeche, A. Bahloul, A. Halitim (2014) Effect of sodium chloride on the wetting induced collapse strain of soils. Malaysian Journal of Civil Engineering 26(2): 119-135.
Delage, P., M. Audiguier, Y.J. Cui, M.D. Howat (1996) Microstructure of compacted silt Canadian Geotechnical Journal, 33(1) : 150-158.
Grabowska, O. (1975) SEM analysis of microstructures of loess deposits. Bulletin of the International Association of Engineering Geology, 11(1), 45-48.
Halitim, A., M. Robert, D. Tessier, R. Prost (1984) Influence de Cations Echangeables (Na+, Ca2+ Mg2+) et de la Concentration Saline sur le Comportement Physique (Rétention en Eau et la Conductivité Hydraulique) de la Montmorillonite. Agronomie 4(5): 451-459.
Jennings, J.E., K. Knight (1975) A guide to construction on or with materials exhibiting additional settlement due to collapse of grain structure. Proceedings of the 6th Regional Conf for African Soil Mechanics and Foundation Engineering, Durban, 1, pp. 99-105.
Karol, R.H. (2003) Chemical grouting and soil stabilization 3rd Ed., Dekker, New York.
Lawton, E.C., R.J. Fragaszi, H. James (1989) Collapse of compacted clayey sand. Journal of Geotechnical Engineering, 115(9) : 1252-1267.
Tessier, D., J. Berrier (1979) Utilisation de la microstructure électronique à balayage dans l’étude des sols. Observations des sols humides soumis à différents pF. Science du Sol 1: 67-82.
Published
2016-08-07
How to Cite
BAHLOUL, Ouassila; ABBECHE, Khelifa; BAHLOUL, Azeddine.
Study of the microstructure of collapsible soil treated with the potassium chloride.
Journal of Applied Engineering Science & Technology, [S.l.], v. 2, n. 1, p. 39-42, aug. 2016.
ISSN 2571-9815.
Available at: <https://revues.univ-biskra.dz/index.php/jaest/article/view/1748>. Date accessed: 19 nov. 2024.
Issue
Section
Section C: Geotechnical and Civil Engineering
Keywords
Collapsible soil; Compaction energy; Chemical treatment; Oedometer
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