Realização e acompanhamento de dois trechos experimentais com asfalto-borracha no estado do Ceará
DOI:
https://doi.org/10.14295/transportes.v13i1.92Abstract
Seguindo uma política de desenvolvimento e aprimoramento de novas tecnologias de pavimentação
para o estado do Ceará, a Universidade Federal do Ceará realizou, em parceria com os departamentos de transportes locais e a Petrobrás, dois trechos com ligante asfalto-borracha (AB). Além de ecologicamente corretas, misturas com AB vêm se mostrando eficientes na minimização dos principais defeitos encontrados nos pavimentos flexíveis, deformação permanente e trincamento por fadiga. O presente trabalho traz um estudo da aplicação do ligante AB, do controle feito durante a usinagem e compactação, bem como o acompanhamento dos trechos através de medidas de deflexão e de algumas propriedades mecânicas do revestimento antes e após execução. Para a mistura de projeto foram usados agregados graníticos locais e CaCO3 como material de enchimento em uma mistura descontínua tendo como granulometria a faixa do Concreto Asfáltico com Borracha do tipo G da Califórnia. O ligante asfalto-borracha usado foi produzido pela BR Distribuidora contendo 20% de borracha e tendo como ligante de origem o CAP 50/60 produzido pela Lubnor e oriundo do petróleo Fazenda Alegre.
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