Estudo de misturas asf??lticas com ligante modificado pelo pol?-mero EVA para pavimentos urbanos de Manaus - AM

摘要

In this research we investigated alternative materials to build urban pavements in Manaus, seeking for pavements with longer lifetime for usage and suitable mechanical properties to withstand the local temperatures. The asphaltic mixtures contained a regional binder, namely CAP 50/70, mixed with 4% of EVA polymer. The incorporation of the latter polymer was aimed at improving the rheological properties of asphaltic concrete used in roads in the Amazonas' capital. The asphalt binders (original and modified) were characterized in accordance with the ANP (National Petroleum Agency) specification and the Superpave methodology. The asphalt mixtures had their mechanical properties studied using creep dynamics at 40 ?oC. The EVA modified binder (AMP EVA) yielded either better rheological properties or properties equivalent to the conventional asphalt (REMAN) throughout all the characterization experiments. The alternative mixtures composed by the binder modified with 4% EVA (SEVA) had superior mechanical performance compared to mixtures made up with the binder commonly commercialized in the region (SMAN).