Initial surmises from a field study of suction behaviour of tropical unsaturated residual soils
Singh, Harwant, Kim Huat, Bujang, Ali, Faisal and Mariappan, Saravanan (2009) Initial surmises from a field study of suction behaviour of tropical unsaturated residual soils. Electronic Journal of Geotechnical Engineering, 14 (Bund. B). pp. 1-8. ISSN 1089-3032
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Official URL: http://www.ejge.com/2009/Ppr0929/Ppr0929.pdf
The generally unsaturated residual soils segment located above the groundwater table possess negative pore-water pressures. This amount of water content and resulting matric suction is an important geotechnical relationship for the unsaturated residual soil. This paper describes a field study that examined the water content and matric suction in the unsaturated weathered residual soil over one of the commonly found soil/rock types constituting the tropical Malaysian terrain i.e. residual soil over sandstones at various weathering grades. The soilwater characteristic curve (SWCC) was found to be characterized by two distinct curves, a wetting (sorption) curve and a drying (desorption) curve, each showing distinctive water retention propensity. Higher weathering grades appear to have a higher suction for a given water content.
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