The present work describes the production and the characterization of blends involving mixtures of CAP 20 with recycled polystyrene, tire powder or organosolve lignin. The main objective related with the modification of the asphalt matrixes is to increase the impermeability impeding water deterioration, to reduce the fragility for low temperatures and to reduce the abrasion phenomena. The physical properties, including penetration index, softening point and index of thermal susceptibility were analyzed and then compared with CAP 20 matrix. The main results show that the addition of tire powder, polystyrene and lignin affect the mechanical properties of the blends when compared with CAP 20, showing a general decrease of penetration and a general improvement of the softening point after addition of modifiers.
asphalt; modification; blends; lignin; polystyrene; tire
