Previsão do módulo dinâmico de misturas asfálticas brasileiras

Abstract

The dynamic modulus |E*| is a property of Hot-Mix Asphalt (HMA), and it is the most used s"ffness parameter input in mechanis"c-empirical pavement design methods. Alt-hough well established in several countries, official methodologies in Brazil for both new and rehabilita"on pavement design do not consider this property. Although laboratory tests methods are interna"onally consolidated, several |E*| mastercurve predic"ve equa"ons are reported on the literature, in an aKempt to reduce "me and costs involved on experimental tes"ng. In this research, empirical models from the open literature to determine the |E*| master curve were evaluated, upon experimental data from 24 Bra-zilian mixtures. A1er evalua"on, one calibrated equa"on was proposed, resul"ng in a simple model, and well-adjusted to the analyzed database. It is expected that calibrated models, as the one proposed in the present research, can facilitate the applica"on, in Brazil, of mechanis"c-empirical pavement design methods. These methods allow the considera"on of viscoelas"city within the surface course, and therefore the effect of temperature and traffic speed in the pavement design.