Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes
Bitumen is a commonly used material for road construction. According to environmental regulations, vegetable-based materials are applied for binder modification. Fluxed road bitumen containing a bio-flux oxidation product increases the consistency over time. The efficiency of crosslinking depends on...
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doaj-a3aae5f28cd04346a7e604a93adc91cc2020-11-24T23:55:15ZengMDPI AGMaterials1996-19442017-09-01109105810.3390/ma10091058ma10091058Towards Understanding the Polymerization Process in Bitumen Bio-FluxesJan B. Król0Łukasz Niczke1Karol J. Kowalski2Faculty of Civil Engineering, Warsaw University of Technology, 00-637 Warsaw, PolandGeneral Directorate for National Roads and Motorways, 66-004 Zielona Góra, PolandFaculty of Civil Engineering, Warsaw University of Technology, 00-637 Warsaw, PolandBitumen is a commonly used material for road construction. According to environmental regulations, vegetable-based materials are applied for binder modification. Fluxed road bitumen containing a bio-flux oxidation product increases the consistency over time. The efficiency of crosslinking depends on the number of double bonds and their position in the aliphatic chain of fatty acid. The main goal of this paper was to examine the structural changes taking place during hardening bitumen with bio-flux additives. Two types of road bitumens fluxed with two different oxidized methyl esters of rapeseed oil were used in this study. Various chemical and rheological tests were applied for the fluxed-bitumen at different stages of oxygen exposure. The oxidation of rapeseed oil methyl ester reduced the iodine amount by about 10%–30%. Hardening of the fluxed bitumen generally results in an increase of the resins content and a reduction of the aromatics and asphaltenes. In the temperature range of 0 °C to 40 °C, bio-flux results with a much higher increase in the phase angle than in temperatures above 40 °C in the bitumen binder. The increase in the proportion of the viscous component in the low and medium binder temperature is favorable due to the potential improvement of the fatigue resistance of the asphalt mixture with such binders.https://www.mdpi.com/1996-1944/10/9/1058bio-oilbio-fluxoxypolymerizationreclaim asphalt pavement (RAP)warm mix asphalt (WMA) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jan B. Król Łukasz Niczke Karol J. Kowalski |
spellingShingle |
Jan B. Król Łukasz Niczke Karol J. Kowalski Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes Materials bio-oil bio-flux oxypolymerization reclaim asphalt pavement (RAP) warm mix asphalt (WMA) |
author_facet |
Jan B. Król Łukasz Niczke Karol J. Kowalski |
author_sort |
Jan B. Król |
title |
Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes |
title_short |
Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes |
title_full |
Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes |
title_fullStr |
Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes |
title_full_unstemmed |
Towards Understanding the Polymerization Process in Bitumen Bio-Fluxes |
title_sort |
towards understanding the polymerization process in bitumen bio-fluxes |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2017-09-01 |
description |
Bitumen is a commonly used material for road construction. According to environmental regulations, vegetable-based materials are applied for binder modification. Fluxed road bitumen containing a bio-flux oxidation product increases the consistency over time. The efficiency of crosslinking depends on the number of double bonds and their position in the aliphatic chain of fatty acid. The main goal of this paper was to examine the structural changes taking place during hardening bitumen with bio-flux additives. Two types of road bitumens fluxed with two different oxidized methyl esters of rapeseed oil were used in this study. Various chemical and rheological tests were applied for the fluxed-bitumen at different stages of oxygen exposure. The oxidation of rapeseed oil methyl ester reduced the iodine amount by about 10%–30%. Hardening of the fluxed bitumen generally results in an increase of the resins content and a reduction of the aromatics and asphaltenes. In the temperature range of 0 °C to 40 °C, bio-flux results with a much higher increase in the phase angle than in temperatures above 40 °C in the bitumen binder. The increase in the proportion of the viscous component in the low and medium binder temperature is favorable due to the potential improvement of the fatigue resistance of the asphalt mixture with such binders. |
topic |
bio-oil bio-flux oxypolymerization reclaim asphalt pavement (RAP) warm mix asphalt (WMA) |
url |
https://www.mdpi.com/1996-1944/10/9/1058 |
work_keys_str_mv |
AT janbkrol towardsunderstandingthepolymerizationprocessinbitumenbiofluxes AT łukaszniczke towardsunderstandingthepolymerizationprocessinbitumenbiofluxes AT karoljkowalski towardsunderstandingthepolymerizationprocessinbitumenbiofluxes |
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