UNSATURATED STRENGTH BEHAVIOUR OF COMPACTED LATERITIC SOILS
This technical note presents the unsaturated shear strength parameters from two theories for two different compacted lateritic soils. The two theories are: (1) a shear strength equation for unsaturated soils, proposed by Fredlund et al. (1978), using two independent stress state variables, the net normal stress and the matrix suction; and (2) Toll's (1990) proposed framework for unsaturated soil behaviour also incorporating volume change. Tests were conducted on two lateritic soils, developed from basalt and sandstone, which have been used for road pavements in south east Queensland, Australia. The shear strength properties were studied on 200mm high, 100mm diameter compacted specimens. Their classification and compaction properties are tabulated. Values obtained for Fredlund's parameter, for the two soils tested, vary with suction. Values obtained for Toll's parameter, for these soils, are in the same range as his results for Kenya gravel. Suction does not affect the shear strength of an unsaturated soil below degree of saturation 53%-55%.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00168505
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Corporate Authors:
Thomas Telford Limited
London, United Kingdom -
Authors:
- MAHALINGA-IYER, U
- Williams, D J
- Publication Date: 1995-6
Language
- English
Media Info
- Features: References;
- Pagination: p. 317-20
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Serial:
- GEOTECHNIQUE
- Volume: 45
- Issue Number: 2
- Publisher: Thomas Telford Limited
- ISSN: 0016-8505
Subject/Index Terms
- TRT Terms: Compaction; Laterites; Mathematical models; Pavements; Percent saturation; Shear strength; Soil suction; Soils; Strength of materials; Stresses; Test procedures; Theory
- ITRD Terms: 5904: Compaction (state of); 5907: Degree of saturation (mater); 4138: Laterite; 6473: Mathematical model; 2955: Pavement; 5531: Shear; 4156: Soil; 5544: Strength (mater); 5575: Stress (in material); 5771: Suction; 6288: Test method; 9078: Theory
- Subject Areas: Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00713414
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Nov 22 1995 12:00AM