Propriedades reológicas do cimento asfáltico de petróleo (CAP 50/70) modificado por adição de óleo de copaíba.

Abstract

Asphaltic petroleum cement is a thermosensitive material destined to the paving industry since, in addition to exposing waterproofing and binder characteristics, it presents great resistance to the action of most salts, alkalis and inorganic acids, and flexibility aspect. CAP may have its behavior determined on the basis of the conditions under which it is present, presenting as a glassy solid at low temperatures and / or under rapid loading, or acting as a viscous fluid at high temperatures and / or loading slow. Commonly, additives are added to this material, seeking to improve its properties, as well as reducing machining and compacting temperatures. Thus, this study has as main objective to evaluate the rheological behavior of modified asphalt binder CAP 50/70 by addition of copaiba oil. Physical and rheological characterization tests will be carried out, including: Multiple Stress Creep Recovery - MSCR, Linear Amplitude Sweep - LAS e Performance Grade - PG for CAP 50/70 with addition of copaiba oil at 1%, 2% and 3% before and after short-term aging- RTFO. It was observed that the addition of the copaiba oil promoted improvements of some of the rheological properties of the binder, however, it was not beneficial for all parameters analyzed.