Internal structure and linear viscoelastic properties of EVA/asphalt nanocomposites |
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Authors: | Markanday Subramanian Sureshkumar Giovanni Polacco Igor Kazatchkov Ludovit Zanzotto |
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Institution: | a Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali (DICCISM), Università di Pisa, Largo LucioLazzarino 2, 56122 Pisa, Italy b Bituminous Materials Chair, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alta., Canada T2N 1N4 |
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Abstract: | The effect of the addition of two different organoclays as a third component in polymer-modified asphalts has been investigated. Ternary mixtures were prepared by adding clay and poly(ethylene-co-vinyl acetate) to the asphalt, either separately, or in the form of a premixed master batch. The performed characterizations allowed the determination of how the two methods of mixing influence the interactions between asphalt and polymer and therefore the final rheological properties. In particular, it was shown that the clay had a compatibilizing effect on asphalt and polymer and that a high compatibility between clay and polymer led to a better dispersion of the polymer in the asphalt, thus influencing the final rheological properties of the studied systems. |
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Keywords: | Polymer-modified asphalt EVA/organoclay Nanocomposites Rheology |
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