Rheological Huet-Sayegh Model Applied for Asphalt Rubber

摘要

Asphalt is the main component of asphalt mixtures used as flexible pavements surface. Nowadays, for light and moderate traffic conditions, conventional asphalt performs adequately. However, under severe conditions of heavy traffic and variety climate, road distress as fatigue and permanent deformation prematurely occur. In these conditions, higher mechanical resistance is required, no longer provided by conventional asphalt. This happens because conventional asphalt has a limited capacity under heavy traffic in specific temperature ranges. In this way, the asphalt needs to be modified to improve asphalt mixtures mechanical performance in the field. This study assed the rheological behavior of asphalts modified with crumb rubber from waste tires. The tests were performed through dynamic shear rheometer, with temperature variation and frequency sweep. The rheological tests were performed with modified asphalts contained different crumb rubber content and then, compared to conventional asphalt, used as a reference. The Cole-Cole plan results showed that conventional asphalt is more susceptible to temperature variation and....