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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Bibliographic Details
Published inJournal of thermal analysis and calorimetry Vol. 148; no. 3; pp. 663 - 674
Main Authors Guimarães, Marcio Evandro, Scremin, Fernando Reinoldo, Bittencourt, Paulo Rodrigo Stival, Possan, Edna, de Souza, Ricardo Oliveira
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.02.2023
Springer
Springer Nature B.V
Subjects
Analysis
Analytical Chemistry
Binders (materials)
Calorimetry
Carbonyl groups
Carbonyls
Chemistry
Chemistry and Materials Science
Homogeneous mixtures
Hydroxyl groups
Infrared analysis
Infrared spectroscopy
Inorganic Chemistry
Measurement Science and Instrumentation
Oxidation
Physical Chemistry
Polyethylene
Polyethylenes
Polymer Sciences
Rheological properties
Rubber
Stability analysis
Thermal stability
Thermogravimetric analysis
Tires
Waste valorisation
Recycled polyethylene
Phase separation
Asphalt binder
Waste tyre rubber
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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. Graphical abstract
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-022-11810-w