Análise comparativa do comportamento mecânico de concreto asfáltico usando ligante modificado por via seca e por via úmida com mistura de resíduo industrial: borracha de recauchutagem de pneus e borra oleosa de petróleo

• Autor(a) principal: Pereira, Mandarlan Hallei Nascimento
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/jspui/handle/riufs/14311
• topic: Engenharia civil; Concreto; Pavimentação asfáltica; Resíduo industrial; Asphalt concrete; Modified asphalt binder; Industrial waste; Mechanical behavior; ENGENHARIAS::ENGENHARIA CIVIL

The asphalt coating layer of road pavements has the function of directly resisting the actions of traffic and transmitting them in an attenuated manner to the lower layers, waterproofing the pavement, in addition to improving the rolling conditions providing users with safety and comfort. In the highways construction, the material used in the floor coverings is hot or cold asphalt concrete. In Brazil, the most applied is hot-machined asphalt concrete (CAUQ), whose aggregates are agglutinated using pre-defined proportions of asphalt binder. Nowadays, the high traffic of vehicles on the highways and the climatic diversity, cause the loss of the functional and structural quality of the pavement. Hence, more and more research is being developed on increasing the strength and durability of the materials that make up the floor covering, through the use of industrial waste as constituent materials of CAUQ. The use of industrial waste in asphalt concrete makes these new destinations possible, reduces the extraction of natural resources and adapts the performance of the road pavement to the current conditions of use. The objective of the present study was to produce CAUQ-type asphalt concrete in laboratory, throughout the dry process, with 10% of the CAP 50/70 modified with a mixture of industrial residues, oil sludge and tire rubber, in concentrations of 85/15 % (M1) and compare its mechanical performance with the CAUQ with 10% of the CAP 50/70 modified with the same concentrations of industrial waste by the wet process, both dosed by the Marshall and Superpave method. The results of the mechanical tests of tensile strength by diametrical compression, resilience module and moisture damage induced by specimens measured by the Marshall and Superpave method, showed that asphalt mixtures modified by the dry process present mechanical behavior above the recommended minimum limit. by DNIT standard 031/2006, indicating that the dry process is viable in the use of industrial residues of oily oil sludge and tire rubber that are not usable in the modification of asphalt binder, in addition to the aforementioned process to prevent their aging by reheating, to present a better control of the temperature, greater practicality and overcome the problem of phase separation.