Abstract

The concern with sustainable development has driven efforts to the study of green technologies to minimize the environmental impacts without compromising pavement quality. In this scenery, the paving industry has started to research and apply warm asphalt mixtures, which are produced in lower temperatures than conventional mixtures and reduce the expenses in fuels. The warm mixtures can result from the addition of an oil, usually organic, to the conventional binder, decreasing the binder's viscosity. Moringa oleifera Lam Seeds possess an oil content varying between 38 and 40% and have antioxidant and lubricant properties. This study aimed to evaluate the changes in properties related to consistency and the effective variation of mixing and compaction temperatures due to asphalt modification with the oil of Moringa oleifera Lam as green additive. The Moringa oleifera Lam oil was extracted by pressing of seeds. Then, 6 mixtures were made using 50/70 PAC and Moringa Oleifera Lam oil in different proportions (0.5%, 1%, 1.5%, 2%, 2.5% and 3%), as well as a reference sample (pure PAC). The binders were analysed using Brookfield Viscosity, Penetration, Softening Point and Rolling Thin Film Oven (RTFOT) Tests. The results showed that the addition of Moringa oleifera Lam oil must be made for contents in the range of 0.5% to 1%, once that to these contents there is a significant reduction in machining and compaction temperatures (≈ 5 °C) without compromising the asphalt binder performance.

Highlights

  • The concern with sustainable development has driven efforts to the study of green technologies to minimize the environmental impacts without compromising pavement quality

  • The warm mixtures can result from the addition of an oil, usually organic, to the conventional binder, decreasing the binder’s viscosity

  • This study aimed to evaluate the changes in properties related to consistency and the effective variation of mixing and compaction temperatures due to asphalt modification with the oil of Moringa oleifera Lam as green additive

Read more

Summary

INTRODUÇÃO

No Brasil, em virtude de poucos investimentos ferroviários e hidroviários, e do alto custo do transporte áereo, a grande maioria das transferências de cargas e transporte de pessoas são realizadas pelo meio rodoviário. Misturas asfálticas mornas ou warm mix asphalt (WMA) são produzidas em temperaturas mais baixas que as convencionais. A adição de aditivos orgânicos / químico, emulsões e ligantes sintéticos podem diminuir as temperaturas de operação de usinagem e campo em cerca de 37 °C [6,7,8].Portanto, logo há a importância de intensificar as pesquisas na área de misturas mornas, para se identificar quais seriam as técnicas ou produtos mais convenientes para o País. Após a extração do óleo da semente de Moringa Oleífera Lam a torta restante não é tóxica e não perde suas propriedades de coagulação, podendo ser usada como decantador no tratamento de água para o consumo humano [13]. Este trabalho consiste em estudar as propriedades físicas de ligantes asfálticos modificadas com o óleo da Moringa Oleífera Lam, como aditivo verde, para reduzir as temperaturas de usinagem e compactação

MATERIAIS E MÉTODOS
Caracterização do óleo da Moringa Oleífera Lam
Ensaio de penetração e ponto de amolecimento
Ensaio de viscosidade Brookfield
Ensaio com reômetro
Findings
AGRADECIMENTOS

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.