dc.contributor.author Bryant, Jr., James William en_US dc.date.accessioned 2014-03-14T20:33:27Z dc.date.available 2014-03-14T20:33:27Z dc.date.issued 1999-03-19 en_US dc.identifier.other etd-041499-233023 en_US dc.identifier.uri http://hdl.handle.net/10919/31719 dc.description.abstract Current mathematical models, developed on straight asphalt binders, are inadequate to characterize the frequency dependence of response of polymer-modified asphalt binders. In an earlier study at Virginia Tech, mathematical models were developed to predict the storage and loss shear moduli of polymer-modified binders. However the model developed for the loss shear moduli is limited at high frequency (G" less than or equal to 10^7.5 Pa). This thesis presents a statistical modeling of loss shear modulus of polymer (random copolymers and thermoplastic block copolymers) modified binder. Data from dynamic mechanical analysis on modified binders, at temperatures between 5 and 75Â°C and frequencies ranging from 0.06 to 0188.5 rad/s, were reduced to dynamic master curves of moduli, and used to develop the model. Twenty-one polymer-binder blends prepared and tested earlier at Virginia Tech where included in the study. Realistic characterization of loss shear moduli values was obtained using the Gompertz statistical model. The model was validated by using mean square error of prediction (MSEP) in which a second set of frequency data was input in the model to obtain the moduli values, which were compared to the measured data of the second set. Although this model was successfully tested for shear loss modulus prediction of polymer-modified binders, caution should be exercised when it is applied, as such a model should be able to predict the storage modulus for a known phase angle. en_US dc.publisher Virginia Tech en_US dc.relation.haspart 1ETD.PDF en_US dc.rights I hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation. en_US dc.subject polymer modified asphalt en_US dc.subject viscoelasticity en_US dc.subject shear modulus en_US dc.title Prediction of Linear Viscoelastic Response of the Loss Shear Modulus of Polymer-Modified Binders en_US dc.type Thesis en_US dc.contributor.department Civil Engineering en_US dc.description.degree Master of Science en_US thesis.degree.name Master of Science en_US thesis.degree.level masters en_US thesis.degree.grantor Virginia Polytechnic Institute and State University en_US thesis.degree.discipline Civil Engineering en_US dc.contributor.committeechair Al-Qadi, Imadeddin L. en_US dc.contributor.committeemember Triani, Toni en_US dc.contributor.committeemember Flintsch, Gerardo W. en_US dc.identifier.sourceurl http://scholar.lib.vt.edu/theses/available/etd-041499-233023/ en_US dc.date.sdate 1999-04-14 en_US dc.date.rdate 2012-04-27 dc.date.adate 1999-05-25 en_US
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