Determination of Mode I Fracture Toughness, Tensile Strength and Adhesion of Compacted Clays

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dc.contributor.advisorWong, Ron
dc.contributor.authorCao, Keda
dc.contributor.committeememberWan, Richard
dc.contributor.committeememberDong, Mingzhe
dc.date2018-11
dc.date.accessioned2018-09-18T19:46:55Z
dc.date.available2018-09-18T19:46:55Z
dc.date.issued2018-09-12
dc.description.abstractTensile strength and fracture toughness are two parameters used to define the ability of resisting fracture under tensile stresses. Adhesion of clays to metals is the strength of soil-metal interface. These properties of cohesive soils are fundamental and essential for geotechnical problems. Two types of compacted clays were used in this research — Calgary till and Regina clay. The fracture toughness KIc and tensile strength σt of two clays were measured by straight notched disk bending (SNDB) method and uniaxial direct tensile test, respectively. Results showed that the variations of σt with respect to moisture content and dry density were very similar with that of KIc. A strong positive correlation between these two properties was found. The tensile strength of compacted clays was curve fitted based on a double-porosity concept which considers the water among micropores and macropores in clay structure and their contribution to the strength of soils. The adhesion of compacted clays to stainless steel was measured using a modified direct shear box test. To obtain the adhesion factors, the adhesion was correlated with unconfined compressive strength of compacted clays. The effects of moisture content and pre-consolidation pressure on adhesion were investigated.en_US
dc.identifier.citationCao, K. (2018). Determination of Mode I Fracture Toughness, Tensile Strength and Adhesion of Compacted Clays (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/32930en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/32930
dc.identifier.urihttp://hdl.handle.net/1880/107754
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultySchulich School of Engineering
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectMode I Fracture Toughness
dc.subjectTensile Strength
dc.subjectAdhesion
dc.subjectCompacted Clay
dc.subject.classificationEngineering--Civilen_US
dc.subject.classificationGeotechnologyen_US
dc.titleDetermination of Mode I Fracture Toughness, Tensile Strength and Adhesion of Compacted Clays
dc.typemaster thesis
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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