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dc.contributor.authorBert, Stephen M.en_US
dc.date.accessioned2014-03-14T20:37:08Z
dc.date.available2014-03-14T20:37:08Z
dc.date.issued2005-05-04en_US
dc.identifier.otheretd-05162005-073043en_US
dc.identifier.urihttp://hdl.handle.net/10919/32852
dc.description.abstractThe objective of this research was to determine if differential camber of prestressed concrete girders could be reduced by accurate prediction of initial camber at release of prestress. Maturity at prestress transfer was used to calculate modulus of elasticity for predicting camber at release. The research consists of a literature review of maturity methods, testing of a standard concrete mix to determine strength and modulus functions and measurement of girder camber and maturity. Both the Nurse-Saul and the Arrhenius maturity models were evaluated. Maturity relationships were developed for concrete mixes containing Type II and Type III cements. A relationship of modulus as a function of maturity was developed. Seven girders were tested. Camber predictions within 0 to ¼ in. of actual camber were obtained using modulus of elasticity calculated from a maturity based function. Comparison was made between maturity based modulus and standard strength based modulus models. Camber predictions based on modulus calculated based on field cured cylinder strengths were within 0 to ½ in.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartBertThesispart4.pdfen_US
dc.relation.haspartBertThesispart3.1.pdfen_US
dc.relation.haspartBertThesispart2.2.pdfen_US
dc.relation.haspartBertThesispart1.2.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectModulus of Elasticityen_US
dc.subjectMaturityen_US
dc.subjectCamberen_US
dc.titleUsing Maturity to Predict Girder Camberen_US
dc.typeThesisen_US
dc.contributor.departmentCivil Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.committeechairRoberts-Wollmann, Carin L.en_US
dc.contributor.committeememberCousins, Thomas E.en_US
dc.contributor.committeememberWeyers, Richard E.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05162005-073043/en_US
dc.date.sdate2005-05-16en_US
dc.date.rdate2005-06-17
dc.date.adate2005-06-17en_US


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