Estudo da viabilidade da substituição do asfalto convencional elaborado com CAP 50/70 por asfalto borracha em vias urbanas de Campo Mourão - PR

Abstract

This paper presents a comparative case study of the laboratorial tests, machining, road application, CAP's price, asphalt binder content, CBUQ's production costs, made between the rubber-asphalt against the conventional asphalt, checking the tecnhical and economic substituion's viability of the asphalt produced with the CAP 50/70 by the asphaltic mixture made with rubber, into the urban roadways Campo Mourão. This research aims to contribute for a better comprehension of the use of rubber (deriving from old tires) as a pavimentation input for civil engineering. So, it's very important the investment in a more resistant asphaltic mixture, with higher durability and with technology enough to increase the lifecycle of the urban tracks, and also give a correct destination of unserviceable tires. The rubber asphalt brings higher attrit resistance results, with better technical perfomance in comparision with the conventional asphalt. Despite the higher prices against the conventional, in the state of Paraná, acoording to the Decree n° 7871 (2017), the asphalt binder it's not taxed by the ICMS, which insures more accessible values of the mixtures, and in this case, it turns the substituion still more viable.