dc.contributor.author	Mehrdad Kholghifard
dc.date.accessioned	2024-12-18T01:01:18Z
dc.date.available	2024-12-18T01:01:18Z
dc.date.issued	2014
dc.description	Thesis (Ph.D (Civil Engineering))
dc.description.abstract	Tropical residual soils are generally unsaturated and attain strength from capillary stresses as well as cementation of soil particles. The strength however decreases significantly upon saturation due to the collapse of capillary stresses. Recently, a large number of modified pressure plate-type devices have been developed to study hydro-mechanical behaviour of unsaturated soils using axis translation technique. Despite the progress in experimental methods, there are still some problems related to the axis translation technique application, e.g. evaporation and condensation of water on the cell wall. This study focuses on the effects of suction changes on volume change behaviour and collapse potential of an unsaturated residual granite soil. A modified oedometer was developed and successfully employed to perform various experiments on unsaturated soils by controlling vertical net stress, suction and temperature simultaneously as well as minimizing the problems related to water condensation. Soil-water characteristic curve (SWCC) for a residual granite soil at different densities was then established based on results obtained from experiments using the modified oedometer. It was found that the empirical equation suggested by Fredlund and Xing (1994) was the best relationship to describe SWCC of the granite residual soil. Results from unsaturated consolidation tests showed a unique volume change behaviour for the residual soil before air entry value, between air entry value and residual suction, and beyond residual suction. The results also indicated higher collapse potential with higher level suction so that the soil was classified as trouble soil. The amount of collapse under a constant suction increases with increasing vertical net stress until reaching a maximum value, and then decreases at the high stress level
dc.description.sponsorship	Universiti Teknologi Malaysia
dc.identifier.uri	https://openscience.utm.my/handle/123456789/1505
dc.language.iso	en
dc.publisher	Universiti Teknologi Malaysia
dc.subject	Soil absorption and adsorption
dc.subject	Soil capillarity
dc.subject	Shear strength of soils—Testing
dc.title	Volume change and collapse potential of unsaturated residual granite soil
dc.type	Thesis
dc.type	Dataset

Volume change and collapse potential of unsaturated residual granite soil

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