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Comportamento à fadiga e à deformação permanente de misturas asfálticas confeccionadas com asfalto-borracha brasileiro

Authors: Fontes, Liseane P. T. L.; Trichês, Glicério; Pereira, Paulo A. A.; Pais, Jorge C.;

Comportamento à fadiga e à deformação permanente de misturas asfálticas confeccionadas com asfalto-borracha brasileiro

Abstract

O crescente e cada vez mais pesado tráfego atuante nas rodovias brasileiras suscitou o desenvolvimento e a busca de novas tecnologias e materiais para atender as necessidades de melhor desempenho das rodovias brasileiras. Esta busca trilhou caminhos já percorridos por vários países europeus e Estados Unidos da América procurando adaptar-se e melhorar as soluções lá desenvolvidas. Entretanto, a falta de equipamentos apropriados para a caracterização adequada do comportamento mecânico de ligantes e misturas asfálticas tem limitado o desenvolvimento de pesquisas no Brasil. Este trabalho caracteriza-se por ser o primeiro estudo brasileiro em que se utilizou asfalto-borracha, obtido pelo processo terminal blend, genuinamente brasileiro, para avaliar o comportamento à fadiga através do ensaio de flexão em 4 pontos de misturas asfálticas confeccionadas com este ligante. Para tanto, buscou-se a parceria com uma Instituição européia para que pudesse ser realizado este estudo. Assim, foram testadas misturas asfálticas com asfalto-borracha terminal blend e comparadas a uma mistura convencional de referência confeccionada com CAP-50/70 usualmente aplicada em revestimentos de rodovias brasileiras. Os resultados mostraram que as misturas asfálticas com asfalto-borracha produzido no Brasil possuem um desempenho muito superior em relação à mistura confeccionada com ligante convencional 50/70.

The continuous growth of heavy road traffic on the Brazilian highways has led the Brazilian Road Administrations to the search and development for new technologies and materials to improve and ensure a better performance, following some American and European models. This work intends to meliorate the solutions adapted by the Brazilian Road Administration. However, the lack of appropriate equipments for the correct characterization of the mechanical behaviour of asphalt and asphalt mixtures has limited the development of researches in the country. This research may be considered to be the first Brazilian study using asphalt rubber, obtained through terminal blend process, genuinely Brazilian, in order to evaluate the fatigue behaviour of asphalt-rubber mixtures through 4-point bending tests, in partnership with an European Institution. Thus, asphalt mixtures with asphalt-rubber terminal blend have been tested and compared to a conventional mixture of reference produced with CAP 50170, which is usually applied on Brazilian highway surfaces. The results showed that asphalt mixtures containing asphalt rubber have a very superior performance in relation to the conventional mixture with CAP 50/70.

Country
Portugal
Related Organizations
Keywords

Fadiga, Tráfego, Asfalto-borracha

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Green