Ageing process effect on thermal and rheological behaviour of asphalt binder modified with recycled polyethylene and waste tyre rubber
The present study aims to achieve a further understanding on interactions in the asphalt binder modified by adding waste tyre rubber (WTR) and recycled polyethylene (RPE), as well as using the ageing process. Thermogravimetric analyses showed that the mixture thermal stability was only affected afte...
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Published in | Journal of thermal analysis and calorimetry Vol. 148; no. 3; pp. 663 - 674 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
01.02.2023
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The present study aims to achieve a further understanding on interactions in the asphalt binder modified by adding waste tyre rubber (WTR) and recycled polyethylene (RPE), as well as using the ageing process. Thermogravimetric analyses showed that the mixture thermal stability was only affected after the ageing process, which increased by the addition of up to 3% RPE. Differential scanning calorimetry (DSC) showed no RPE melting after the binder’s ageing, suggesting a homogeneous mixture formation. Infrared spectroscopy analyses demonstrated that the binder ageing process promoted the hydroxyl groups oxidation to carbonyl groups, reducing the system polarity and promoting a better binder-RPE interaction. Rheological analyses showed that WTR and RPE addition improved the binder’s properties; however, after ageing process, samples containing RPE had a distinctive behaviour forming a homogeneous mixture.
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ISSN: | 1388-6150 1588-2926 |
DOI: | 10.1007/s10973-022-11810-w |