Estudo do comportamento reológico do cimento asfáltico de petróleo com adição de borracha estireno-butadieno

Abstract

Asphalt pavement is widely used in the road sector, which is the main and most important method of transporting goods and passengers in Brazil. Asphalt pavement is subject to failures due to mechanical and thermal fatigue which caused by being subjected to constant loads and deloads as well as the temperature variations it can experience throughout the day and throughout the year. It is common to use other materials to modify the properties of the asphalt binder, including polymers. This work investigated the rheological properties and how the use of SBR rubber as a modifier affects them at different temperatures. Thermogravimetric analyses were also performed and curve fittings to identify changes in the material’s behavior at different temperatures. After the analysis, it was observed how the addition of SBR altered the properties of the 50/70 asphalt binder and brought positive changes especially to the flow behavior index of the material.