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Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen
As bitumen oxidizes, material stiffening and embrittlement occur, and bitumen eventually cracks. The use of anti-oxidants, such as lignin, could be used to delay oxidative aging and to extend the lifetime of asphalt pavements. In this study, the chemical and rheological effect of lignin on bitumen w...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6947462/ https://www.ncbi.nlm.nih.gov/pubmed/31842332 http://dx.doi.org/10.3390/ma12244176 |
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author | Zhang, Yi Liu, Xueyan Apostolidis, Panos Gard, Wolfgang van de Ven, Martin Erkens, Sandra Jing, Ruxin |
author_facet | Zhang, Yi Liu, Xueyan Apostolidis, Panos Gard, Wolfgang van de Ven, Martin Erkens, Sandra Jing, Ruxin |
author_sort | Zhang, Yi |
collection | PubMed |
description | As bitumen oxidizes, material stiffening and embrittlement occur, and bitumen eventually cracks. The use of anti-oxidants, such as lignin, could be used to delay oxidative aging and to extend the lifetime of asphalt pavements. In this study, the chemical and rheological effect of lignin on bitumen was evaluated by using a single dosage organsolv lignin (10 wt.% dosage). A pressure aging vessel (PAV) was used to simulate the long-term aging process after performing the standard short-term aging procedure, and the lignin-modified bituminous binders were characterized by an environmental scanning electron microscope (ESEM), Fourier-transform infrared (FTIR) spectroscopy, and a dynamic shear rheometer (DSR). From the ESEM results, the uniform microstructure was observed, indicating that the addition of lignin did not affect the worm structure of bitumen. Based on the FTIR test results, lignin-modified bitumen showed that a lower number of carbonyl and sulfoxide compounds were generated after aging than for neat bitumen. Based on the linear amplitude sweep (LAS) results, the addition of lignin slightly reduced the fatigue life of bitumen. From the frequency sweep results, it showed that lignin in bitumen acts as a modifier since the physical interaction between lignin and bitumen predominantly affects the material rheology. Overall, lignin could be a promising anti-oxidant due to its economic and environmental benefits. |
format | Online Article Text |
id | pubmed-6947462 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69474622020-01-13 Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen Zhang, Yi Liu, Xueyan Apostolidis, Panos Gard, Wolfgang van de Ven, Martin Erkens, Sandra Jing, Ruxin Materials (Basel) Article As bitumen oxidizes, material stiffening and embrittlement occur, and bitumen eventually cracks. The use of anti-oxidants, such as lignin, could be used to delay oxidative aging and to extend the lifetime of asphalt pavements. In this study, the chemical and rheological effect of lignin on bitumen was evaluated by using a single dosage organsolv lignin (10 wt.% dosage). A pressure aging vessel (PAV) was used to simulate the long-term aging process after performing the standard short-term aging procedure, and the lignin-modified bituminous binders were characterized by an environmental scanning electron microscope (ESEM), Fourier-transform infrared (FTIR) spectroscopy, and a dynamic shear rheometer (DSR). From the ESEM results, the uniform microstructure was observed, indicating that the addition of lignin did not affect the worm structure of bitumen. Based on the FTIR test results, lignin-modified bitumen showed that a lower number of carbonyl and sulfoxide compounds were generated after aging than for neat bitumen. Based on the linear amplitude sweep (LAS) results, the addition of lignin slightly reduced the fatigue life of bitumen. From the frequency sweep results, it showed that lignin in bitumen acts as a modifier since the physical interaction between lignin and bitumen predominantly affects the material rheology. Overall, lignin could be a promising anti-oxidant due to its economic and environmental benefits. MDPI 2019-12-12 /pmc/articles/PMC6947462/ /pubmed/31842332 http://dx.doi.org/10.3390/ma12244176 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zhang, Yi Liu, Xueyan Apostolidis, Panos Gard, Wolfgang van de Ven, Martin Erkens, Sandra Jing, Ruxin Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title | Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title_full | Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title_fullStr | Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title_full_unstemmed | Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title_short | Chemical and Rheological Evaluation of Aged Lignin-Modified Bitumen |
title_sort | chemical and rheological evaluation of aged lignin-modified bitumen |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6947462/ https://www.ncbi.nlm.nih.gov/pubmed/31842332 http://dx.doi.org/10.3390/ma12244176 |
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