Effects of Impurities and Ageing on the Functional and Rheological Properties of Asphalts with Additives from Recovered and Pyrolysis-Processed Plastics

This article is a continuation of work on the use of plastic waste (such as PP, PS, LDPE, HDPE, and their mixtures) processed in the proprietary pyrolysis process as asphalt additives. The article carried out detailed tests of the mixes of selected additives with pen-graded bitumen 50/70, taking int...

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Bibliographic Details
Published in:Materials 2024-07, Vol.17 (14), p.3451
Main Authors: Gajewski, Marcin Daniel, Horodecka, Renata, Bańkowski, Wojciech, Mirski, Krzysztof, Grzegórska, Aleksandra, Kłopociński, Maciej
Format: Article
Language:English
Subjects:
Additives
Aging
Asphalt mixes
Asphalt pavements
Elastic recovery
Environmental impact
Hydrocarbons
Impurities
Mixtures
Modulus of elasticity
Plastics
Polyethylenes
Polystyrene resins
Pyrolysis
Raw materials
Reproducibility
Rheological properties
Rheology
Segregation
Shear modulus
Temperature
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Summary:This article is a continuation of work on the use of plastic waste (such as PP, PS, LDPE, HDPE, and their mixtures) processed in the proprietary pyrolysis process as asphalt additives. The article carried out detailed tests of the mixes of selected additives with pen-graded bitumen 50/70, taking into account, among others, the influence of impurities and the ratio of PE to PP in the additives as well as short- (RTFOT) and long-term (RTFOT + PAV) ageing. An extensive research program was carried out, including functional and rheological tests in a wide range of temperatures. First, tests of stability and adhesion to various types of aggregates were carried out, demonstrating the usefulness of the proposed additives. Then, the elastic recovery and the impact of technological ageing on penetration, Fraass breaking temperature, and plasticity range were assessed. The same binder mixes were subjected to rheological tests in a wide range of technological and operational temperatures, assessing, among others, viscosity, the norm of the complex shear modulus, elastic recovery and compliance in the MSCR test, and stiffness in the bending beam rheometer. This entire class of tests was carried out for clean samples and those containing impurities, indicating their impact on individual material parameters.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17143451