Determining the asphalt mastercurve from free-free resonant testing on cylindrical samples
نویسنده
چکیده
There is a need to develop simple and quick non-destructive tests to measure the complex dynamic modulus of asphalt over a wide frequency and temperature range, i.e. mastercurve. In this study results from free-free resonant frequency measurements on cylindrical disk shaped asphalt samples are presented. The resulting mastercurve, obtained by resonant frequency testing at different temperatures, compares well with reference mastercurves predicted from Witczaks equation within the high modulus range. The proposed method is simple, repeatable, and economically efficient. Résumé Dans cette étude, on a cherché à mettre au point des tests non-destructifs et rapides pour établir les courbes maîtresses du module dynamique complexe de l’asphalte pour une large gamme de fréquences et de températures. Des mesures de la fréquence de résonance en mode libre sur des cylindres d’asphalte aplatis sont utilisées. Les courbes maîtresses résultantes sont en bon accord avec les courbes de référence prédites à partir de l’équation de Witczaks pour les modules élevés. Les résultats sont reproductibles, la méthode est simple et économique.
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تاریخ انتشار 2009