Modern two-component modifiers inhibiting the aging process of road bitumen

Type
Article
Subtype
Research article
Authors/Creators
;;
PBN affiliation
civil engineering, geodesy and transport
Journal
Construction and Building Materials
eISSN
1879-0526
Date
2023
Volume
409
DOI
10.1016/j.conbuildmat.2023.133838
Abstract EN
The bitumen physicochemical properties of are constantly changing during both the production of asphalt mixtures and the service of road pavements. These changes involve bitumen hardening which consequently cause formation of defects and cracks in road pavements. Therefore, in recent years, prolonging road pavement life by inhibiting the bitumen aging process is a key trend in road engineering, bringing many economic, environmental and social benefits. In line with these trends, the main objective of this research was inhibition of short-term bitumen aging by two-component chitosan-based polymer composites containing ligands with different chemical structures, i.e. polyaniline, methacrylamide and 2-acrylamido-2-methylpropanesulfonic acid. This paper presents their effect on the TFOT aging process, as well as physicochemical and structural changes. Studies show that the strongest anti-aging properties are demonstrated by the chitosan:polyaniline composite. Its use at 2 % w/w allows it to maintain 90 % of the primary penetration value, increase the softening point by only 2°C and increase dynamic viscosity by 17% in comparison to non-aged modified bitumen. In addition, the use of the composite makes it possible to reduce the degree of bitumen components oxidation, which is seen from the reduction of carbonyl and sulfoxide indices by more than 33 % and 47 %, respectively.
Keywords EN
short-term bitumen aging
polymer composite
FTIR
VAI
SPI
PRR
NMR
AFM
Version
Version of Record
Related project
MINIATURA
Number of related project/contract
2021/05/X/ST8/00161
Statistics
8Scopus© Citations
30Views
11Downloads
Malinowski, S., Woszuk, A., & Franus, W. (2023). Modern two-component modifiers inhibiting the aging process of road bitumen (Vol. 409). https://doi.org/10.1016/j.conbuildmat.2023.133838
Loading...
Thumbnail Image
Files
1-s2.0-S0950061823035560-main....
PDF 6.48 MB
Licence
Except as otherwise noted, this item is licensed under the Attribution licence | Permitted use of copyrighted works
Accessibility issue?Request a WCAG-compliant file
Publication available in collections:
Open Access Publications