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Volume Change Behaviour of Soil Influenced with Sulfuric Acid

Sivapullaiah, PV and Prasad, Guru B and Allam, MM (2008) Volume Change Behaviour of Soil Influenced with Sulfuric Acid. In: Geocongress 2008, ASCE.

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Official URL: http://cedb.asce.org/cgi/WWWdisplay.cgi?162528

Abstract

The paper brings out the role of calcium carbonate (CaCO3) on the volume change behaviour of natural black cotton soil with 1N sulfuric acid (H2SO4) as pore fluid. Natural black cotton soil contained predominantly montmorillonite [Ca0.2(Al,Mg)2Si4 O10 (OH)2 .4H2O] along with other minerals such as amesite [(Mg Fe)2 Al (Si Al)2 O5 (OH)4], kalsilite [KAlSiO4] and quartz [SiO2]. The calcitic soil, reacted with H2SO4 during consolidation testing, showed the presence of the new mineral yavapaiite [K Fe(SO4)2]. Consequently, the carbonate soil treated with 1N H2SO4 led to higher swell at seating load and more compression upon loading than the soil with no carbonate. The swelling increased with increase in the amount of carbonate present in the soil.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to American Society of Civil Engineers.
Keywords: Soil pollution;Acids;Arid lands
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 23 Sep 2011 08:46
Last Modified: 23 Sep 2011 08:46
URI: http://eprints.iisc.ernet.in/id/eprint/40742

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