Resumo

REYES-ORTIZ, Oscar J.. Dynamics and mechnicals changes of the asphalt mixture properties by asphalt type and compaction energy. Ing. Desarro. [online]. 2009, n.26, pp.139-155. ISSN 0122-3461.

The objective of this study was to evaluate the influence of three types of asphalt with different characteristics (60/70 of Penetration, 85/100 of Penetration and polymer modified asphalt) and compaction energy in the mechanical and dynamic changes of the dense asphalt mixture, used as a rolling layer by specifications IDU. The ideal asphalt content was determined by the Marshall. The mechanics and dynamic characterization of the mixture, was realized with diametral compression tests at 15 ° C, rutting with 900 MPa and 60° C, resilient modulus with 15, 20 and 30 °C, 5 Hz frequency and the cohesion curve through the characterization Universal Binders (UCL) test with 0, 10, 20, 30 and 40° C. The study found that the results show that the mixture prepared with asphalt 60/70 presents highter resilient modulus value at temperatures studied and the mixture manufactured with modified asphalt has rutting lower than conventional asphalt. Finally, resistance to traction and indirect cohesion curve state is best for the modified asphalt

Palavras-chave : Resilient modulus; rutting; asphalt mixture; aggregate gradations and UCL.