Intrinsic compression characteristics of an expansive clay from Western Australia
MetadataShow full item record
Intrinsic compression behaviour of an expansive clay from Western Australia is investigated using the intrinsic framework in this study. Oedometer results conform with the intrinsic concept at post-yield phase. However, there is a great impact of initial water content on the compression curves at pre-yield stage. It specifies that there is an initial structure similar to a natural clay structure which resists applied forces at this phase and it is related to the amount of initial water content at the preparation stage. Nonetheless, this interparticle bonding is demolished when vertical stress becomes greater than remoulded yield stress. The findings also show that the remoulded yield stress of a reconstituted clay decreases non-linearly with the increase of initial water content, and is remarkably affected by its clay mineralogy. The remoulded yield stress of a soil with the predominant clay of smectite is far greater than those of other clay minerals despite having the same normalised initial void ratio value (e0/eL). Moreover, remoulded yield stress of an expansive soil with main clay mineral of smectite decreases more abruptly than for other clay minerals reported in the literature. Reconstituted compression indexes (C*c,e100*) for clays with a considerable amount of smectite are also greater than respective values for other clay minerals.
Showing items related by title, author, creator and subject.
Habibbeygi, F.; Nikraz, Hamid (2018)Oedometer tests were carried out on reconstituted clays to investigate the compressibility of soft clays with high initial water content under repetitive cycles of unloading/reloading. It is necessary to estimate the ...
Loh, Beng Heng (2011)The railway track foundation of fine-grained soil subgrade, under repeated loading of cyclic nature, can gradually build up excess pore pressure and result in progressive shear failure at a stress level much lower than ...
Characterisation of the undrained shear strength of expansive clays at high initial water content using intrinsic conceptHabibbeygi, F.; Nikraz, Hamid (2018)© 2018, Int. J. of GEOMATE. Twenty-four direct shear tests were conducted on remolded/reconstituted specimens to study the effect of initial water content on the undrained shear strength of expansive clays. The laboratory ...