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Effect of non-plastic fines on cyclic behaviour of sandy soils

Sitharam, TG and Dash, HK (2008) Effect of non-plastic fines on cyclic behaviour of sandy soils. In: GeoCongress 2008: Geosustainability and Geohazard Mitigation (GSP 178) Proceedings of session of GeoCongress 2008.

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This paper presents the results of the detailed studies on stress - controlled cyclic triaxial tests on sandy soils from Ahmedabad, Gujarat, India subjected to a loading frequency of 0.1 Hz in cyclic triaxial equipment. Undrained stress controlled cyclic triaxial tests were carried out on cylindrical samples of size 50 mm diameter and height 100 mm with different cyclic stress ratios. Laboratory evaluations were carried out to compare the cyclic resistance of clean sand to that of sand with various fines contents at a constant gross void ratio. The gross void ratio considers the voids formed by sand particles and fines. The effects of gross void ratio with and without fines on pore water pressure build up and liquefaction potential of sandy soils in stress controlled tests are presented. The results obtained from this study provide direct evidence that the limiting silt content plays an important role in the cyclic resistance of sandy soils. Below the limiting silt content the cyclic resistance decreases until the limiting silt content is reached and then the cyclic resistance increases.

Item Type: Conference Paper
Publisher: American Society of Civil Engineers
Additional Information: Copyright of this article belongs to American Society of Civil Engineers.
Keywords: Sand;Plasticity;Liquefaction;Seismic effects
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 13 Oct 2011 10:55
Last Modified: 13 Oct 2011 10:55
URI: http://eprints.iisc.ac.in/id/eprint/40807

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