Abstract
Este artigo objetiva apresentar os resultados preliminares de um trecho monitorados em Goiás, incorporando análises mecanicistas de modo a contribuir com o banco de dados de materiais, tecnologias e desempenho de um pavimento asfáltico executado com Tratamento Superficial Duplo (TSD). Para isso, nesta pesquisa foram realizados ensaios laboratoriais com os materiais em termos de caracterização, comportamento mecânico e resiliente dos componentes de cada camada, verificando também o comportamento do cascalho melhorado com cimento em três teores diferentes. A seção de teste do pavimento foi monitorada durante a execução e até 6 meses após liberação do tráfego, por meio da determinação das deflexões, das macro e microtexturas, da medida da trilha de roda, da avaliação do tráfego e da identificação dos defeitos aparentes. O dimensionamento do TSD também foi avaliado. As tensões e deformações desenvolvidas ao longo das camadas foram obtidas e os módulos de campo determinados por meio de retroanálise. Os resultados mostraram ganho de desempenho mecânico com a adição de cimento no cascalho, falhas na execução, surgimento precoce de patologias, elevadas deformações nas camadas inferiores à base e superdimensionamento de emulsão no TSD.
Highlights
The sustainable development of a country depends on a transport system that combines productivity and quality
Other factors can contribute to the rapid degradation of Brazilian pavements such as: a lack of in-depth studies conducted for the materials used, a lack of adequate execution control, and the failure to monitor the performance of the post-construction structure
The design was developed by the State of Goiá s Infrastructure and Transport Agency (GOINFRA), using the conventional method based on the California Bearing Ratio (CBR) for an equivalent number of standard load (N) equal to 2.58 × 106 vehicles
Summary
The sustainable development of a country depends on a transport system that combines productivity and quality. A regular infrastructure review is necessary for the system to increase its performance and adapt to new demands. In Brazil, road transport is the most used for both. In Brazil only 13% of the highways are paved, and 57% have their general status classi%ied as reasonable, bad or very bad (CNT, 2019). The fact that more than half of the built pavements have problems is partly due to the design method that is still used for asphalt pavements, which involves a calculation process that is no longer adequate for current characteristics. Other factors can contribute to the rapid degradation of Brazilian pavements such as: a lack of in-depth studies conducted for the materials used, a lack of adequate execution control, and the failure to monitor the performance of the post-construction structure
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