ABSTRACT

ABSTRACT: To find out the influence of the gravimetric content of polymers in asphalt mixtures, conventional asphalt mixtures were modified with different polymer additives and gravimetric polymer content. They have been tested and compared to asphalt mixes which were produced with different ready mixed PmB. The quality of asphalt mixtures were characterized by means of the rutting resistance and mechanical characteristics, the resilient modulus. Conventional asphalt mixtures modified with granular polymers show a similar asphalt quality compared to PmB 45A if a gravimetric content of about 4% with respect to the mass of the base bitumen is chosen. Conventional asphalt with a gravimetric polymer content of 10% with respect to the mass of the base bitumen provides a similar or better asphalt quality compared to a special bitumen PmB 25H. These results confirm that high quality asphalt can be produced by modifying conventional asphalt mixtures with granular polymer additives in a dry process.