Development of a constitutive model for a heaving clay from Rosebank

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dc.contributor.advisorMartin, J Ben_ZA
dc.contributor.advisorScheele, Fen_ZA
dc.contributor.authorWiseman, K Hen_ZA
dc.date.accessioned2014-10-17T07:25:18Z
dc.date.available2014-10-17T07:25:18Z
dc.date.issued1993en_ZA
dc.descriptionBibliography: leaves 135-142.en_ZA
dc.description.abstractHeaving clays are partially saturated soils composed of a high fraction of the montmorillonite clay mineral. When exposed to free water they undergo volumetric expansion, which often results in differential movements at the surface and damage to building structures founded on the clay. The economic consequences of such damage is severe. Heaving clay causes in excess of R100 million damage in South Africa each year, making it the country's most significant problem soil. The best method of dealing with a heaving clay is through appropriate design. This would be facilitated if methods such as finite element analysis were available to designers. The aim of this research project was to develop a constitutive model for an expansive clay which could be numerically implemented within the finite element method. A review of available literature on expansive clays showed that the heave strain that clay under an applied load will undergo can be expressed in terms of the parameters percent heave and heave pressure. These parameters are influenced by the degree of moisture changes experienced by the soil, and its dry density. Various different methods of establishing the percent heave and heave pressure have been proposed, but the values given by each differ due to the influence of different test stress paths on the results. More detailed examination of the effect of test stress path on the volume of heaving clays was therefore required to resolve the reasons for the differences in the test results, and to give a fuller understanding of the volumetric response of the material for the purposes of developing the constitutive model. Hence a series of laboratory tests was conducted on a clay from Rosebank in the Cape Province to investigate the effect of test stress path on the clay volume.en_ZA
dc.identifier.apacitationWiseman, K. H. (1993). <i>Development of a constitutive model for a heaving clay from Rosebank</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering. Retrieved from http://hdl.handle.net/11427/8452en_ZA
dc.identifier.chicagocitationWiseman, K H. <i>"Development of a constitutive model for a heaving clay from Rosebank."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1993. http://hdl.handle.net/11427/8452en_ZA
dc.identifier.citationWiseman, K. 1993. Development of a constitutive model for a heaving clay from Rosebank. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Wiseman, K H AB - Heaving clays are partially saturated soils composed of a high fraction of the montmorillonite clay mineral. When exposed to free water they undergo volumetric expansion, which often results in differential movements at the surface and damage to building structures founded on the clay. The economic consequences of such damage is severe. Heaving clay causes in excess of R100 million damage in South Africa each year, making it the country's most significant problem soil. The best method of dealing with a heaving clay is through appropriate design. This would be facilitated if methods such as finite element analysis were available to designers. The aim of this research project was to develop a constitutive model for an expansive clay which could be numerically implemented within the finite element method. A review of available literature on expansive clays showed that the heave strain that clay under an applied load will undergo can be expressed in terms of the parameters percent heave and heave pressure. These parameters are influenced by the degree of moisture changes experienced by the soil, and its dry density. Various different methods of establishing the percent heave and heave pressure have been proposed, but the values given by each differ due to the influence of different test stress paths on the results. More detailed examination of the effect of test stress path on the volume of heaving clays was therefore required to resolve the reasons for the differences in the test results, and to give a fuller understanding of the volumetric response of the material for the purposes of developing the constitutive model. Hence a series of laboratory tests was conducted on a clay from Rosebank in the Cape Province to investigate the effect of test stress path on the clay volume. DA - 1993 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1993 T1 - Development of a constitutive model for a heaving clay from Rosebank TI - Development of a constitutive model for a heaving clay from Rosebank UR - http://hdl.handle.net/11427/8452 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/8452
dc.identifier.vancouvercitationWiseman KH. Development of a constitutive model for a heaving clay from Rosebank. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1993 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/8452en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Civil Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCivil Engineeringen_ZA
dc.titleDevelopment of a constitutive model for a heaving clay from Rosebanken_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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