A Study of Rubber-REOB Extender to Produce Sustainable Modified Bitumens

Thanks to greater attention to the environment and the depletion of non-renewable resources, the sustainability and the circular economy have become crucial topics. The current trend of pavement engineering is to reduce the use of standard bitumen by replacing it with more sustainable materials such...

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Bibliographic Details
Published in:Applied sciences 2020-02, Vol.10 (4), p.1204
Main Authors: Tarsi, Giulia, Caputo, Paolino, Porto, Michele, Sangiorgi, Cesare
Format: Article
Language:English
Subjects:
Asphalt
bitumen
bitumen extender
Bitumens
By products
Depletion
End of life
Investigations
NMR
nmr analysis
Nonrenewable resources
Nuclear magnetic resonance
Polymers
powdered rubber
re-refined engine oil bottom
Recycled materials
Renewable resources
Rheology
Rubber
Scanning electron microscopy
sem analysis
Spectrometers
Sustainability
Sustainable materials
Sustainable yield
Tires
Viscosity
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Summary:Thanks to greater attention to the environment and the depletion of non-renewable resources, the sustainability and the circular economy have become crucial topics. The current trend of pavement engineering is to reduce the use of standard bitumen by replacing it with more sustainable materials such as industrial residues and by-products. In this regard, the present study aims to characterize innovative extended bitumen using recycled materials. Due to promising preliminary results as bitumen modifiers, the powdered rubber from end-of-life tires and the re-refined engine oil bottom (REOB) have been investigated as feasible components of bitumen extenders. Nevertheless, several variables strongly affect the performance of the resulting binder, which cannot be neglected. Hence, this research focuses on the rubber–REOB interaction in order to evaluate their optimum ratio, which may maximize the use and advantages of both recycled materials as suitable partial replacements for bitumen. Various rubber–REOB ratios were considered and investigated by means of low and high frequency nuclear magnetic resonance (NMR) spectrometers and scanning electron microscope (SEM).
ISSN:2076-3417
2076-3417
DOI:10.3390/app10041204