Characterization of high-calcium fly ash for evaluating the sulfate resistance of concrete

dc.contributor.advisorFerron, Raissaen
dc.contributor.advisorFolliard, Kevin J.en
dc.creatorKruse, Karla Anneen
dc.date.accessioned2012-06-25T15:29:32Zen
dc.date.available2012-06-25T15:29:32Zen
dc.date.issued2012-05en
dc.date.submittedMay 2012en
dc.date.updated2012-06-25T15:29:50Zen
dc.descriptiontexten
dc.description.abstractConcrete structures are often exposed to sulfates, which are typically found in groundwater and soils, in agricultural run-off, in industrial facilities, and in other source points. These sulfates may attack concrete and significantly shorten the service life of concrete due to reactions between sulfate ions and concrete constituents. These reactions form expansive and deleterious compounds that lead to cracking and spalling of the concrete. This reaction is a function of the sulfate solution but also the physical, chemical, and mineralogical properties of the cement and supplemental cementitious materials (SCMs). It is widely understood that the addition of some fly ashes, by-products of coal combustion power plants, improve the sulfate resistance of the concrete but some fly ash additions actually reduce the sulfate resistance. This project aims to understand this relationship between fly ash and sulfate resistance. Using sulfate testing results on mortar previously obtained at The University of Texas at Austin, this research evaluated the mineralogical, chemical, and physical characteristics of fly ash and attempted to link these measured characteristics (or combinations thereof) to sulfate resistance of concrete.en
dc.description.departmentCivil, Architectural, and Environmental Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2012-05-5489en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2012-05-5489en
dc.language.isoengen
dc.subjectFly ashen
dc.subjectSulfate resistanceen
dc.subjectASTM C1012en
dc.subjectSulfate attacken
dc.titleCharacterization of high-calcium fly ash for evaluating the sulfate resistance of concreteen
dc.type.genrethesisen
thesis.degree.departmentCivil, Architectural, and Environmental Engineeringen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen
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