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Role of soil structure and matric suction in collapse of a compacted clay soil

Rao, SM and Revanasiddappa, K (2003) Role of soil structure and matric suction in collapse of a compacted clay soil. In: Geotechnical Testing Journal, 26 (1). pp. 102-110.

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This paper examines the role of microstructure and matric suction in the collapse behavior of a compacted clay soil from Bangalore District in Karnataka State, India. The microstructure of the compacted specimens was examined by mercury intrusion porosimetry (MIP), and the ASTM Filter Paper Method was used to determine their matric suction. The microstructure and matric suction of the compacted specimens were changed by varying their compaction water content, dry density, and clay content (< 2 mum fraction). Experimental results showed that relative abundance of coarse (60 to 6 mum) pores was mainly affected by increasing the dry density of the specimens from 1.49 to 1.77 g/cm(3). The relative abundance of coarse and fine (0.01 to 0.002 mum) pores was affected by increasing the compaction water content from 10.6 to 26.4%. Variations in dry density, compaction water content, and clay contents notably affected the matric suction of the compacted specimens. The collapse behavior of the compacted specimens is explained from analysis of the MIP and matric suction results.

Item Type: Journal Article
Publication: Geotechnical Testing Journal
Publisher: ASTM International
Additional Information: Copyright of this article belongs to ASTM International.
Keywords: compacted soils;collapse;microstructure;matric suction
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 25 Aug 2011 06:02
Last Modified: 25 Aug 2011 06:02
URI: http://eprints.iisc.ac.in/id/eprint/40193

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