Estudo de redução de temperatura de misturas asfálticas e a influência da adição de cera de abelha.

Abstract

Hot-machined asphalt mixtures undergo a heating process at high temperatures, which causes high energy costs and harmful gas emissions to the environment and to exposed workers. Furthermore, high temperatures also influence the quality of the binder. Seeking to alleviate these problems, studies were carried out to reduce the machining and compaction temperatures of the mixtures, giving rise to warm asphalt mixtures (WMAs), in which they are developed with the use of additives. Thus, the objective of this research was to evaluate the changes in the mechanical properties of an asphalt mixture when using its approximate machining and compaction temperatures to what was obtained for a warm asphalt mixture using 5% beeswax, seeking to compare them . Using the SUPERPAVE dosing method and the temperatures found in the Rotational Viscosity test, the specimens were molded to carry out the Tensile Strength and Modulus Resilience tests. In this context, with the results obtained, it can be concluded that the use of beeswax, at 5% content, to reduce machining and compaction temperatures did not show significant results when compared to pure asphalt mixture in the same range and temperature variation.