Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations
Soybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt bi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/23/7080 |
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| author | Xiaorui Zhang Chao Han Xinxing Zhou Frédéric Otto Fan Zhang |
| author_facet | Xiaorui Zhang Chao Han Xinxing Zhou Frédéric Otto Fan Zhang |
| author_sort | Xiaorui Zhang |
| collection | DOAJ |
| description | Soybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt binder (BRAA) using soybean oil. In the study, the chemical structure of the soybean oil was comparatively characterized using an element analyzer (EA), gel permeation chromatography (GPC), and a Fourier infrared (FTIR) spectrometer, respectively. Based on the chemical structure of the bio-oil, BRAA molecular models were built for computing the diffusion parameters using molecular dynamic simulations. Likewise, a dynamic shear rheometer (DSR) test device was used for measuring and quantifying the rheological properties of the aged asphalt binder rejuvenated with 0%, 1%, 2%, 3%, 4%, and 5% soybean oil, respectively. The laboratory test results indicate that bio-oil could potentially improve the diffusion coefficients and phase angle of the aged asphalt binder. Similarly, the corresponding decrease in the complex shear modulus has a positive effect on the low-temperature properties of BRAA. For a bio-oil dosage 4.0%, the diffusion coefficients of the BRAA components are 1.52 × 10<sup>−8</sup>, 1.33 × 10<sup>−8</sup>, 3.47 × 10<sup>−8</sup>, 4.82 × 10<sup>−8</sup> and 3.92 × 10<sup>−8</sup>, respectively. Similarly, the corresponding reduction in the complex shear modulus from 1.27 × 10<sup>7</sup> Pa to 4.0 × 10<sup>5</sup> Pa suggests an improvement in the low-temperature properties of BRAA. Overall, the study contributes to the literature on the potential use of soybean-derived bio-oil as a rejuvenator of aged asphalt binders. |
| first_indexed | 2024-03-10T04:48:23Z |
| format | Article |
| id | doaj.art-712509366c634cb6827c11c5d1a8bfe3 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T04:48:23Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-712509366c634cb6827c11c5d1a8bfe32023-11-23T02:47:07ZengMDPI AGMolecules1420-30492021-11-012623708010.3390/molecules26237080Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory ExperimentationsXiaorui Zhang0Chao Han1Xinxing Zhou2Frédéric Otto3Fan Zhang4School of Transportation, Southeast University, Nanjing 211189, ChinaFangshan R&D Base, Jsti Group, Nanjing 210017, ChinaKey Laboratory of Highway Construction and Maintenance Technology in Loess Region, Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030032, ChinaChair and Institute of Highway Engineering, Mies-van-der-Rohe-Straße 1, 52074 Aachen, GermanySchool of Transportation, Southeast University, Nanjing 211189, ChinaSoybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt binder (BRAA) using soybean oil. In the study, the chemical structure of the soybean oil was comparatively characterized using an element analyzer (EA), gel permeation chromatography (GPC), and a Fourier infrared (FTIR) spectrometer, respectively. Based on the chemical structure of the bio-oil, BRAA molecular models were built for computing the diffusion parameters using molecular dynamic simulations. Likewise, a dynamic shear rheometer (DSR) test device was used for measuring and quantifying the rheological properties of the aged asphalt binder rejuvenated with 0%, 1%, 2%, 3%, 4%, and 5% soybean oil, respectively. The laboratory test results indicate that bio-oil could potentially improve the diffusion coefficients and phase angle of the aged asphalt binder. Similarly, the corresponding decrease in the complex shear modulus has a positive effect on the low-temperature properties of BRAA. For a bio-oil dosage 4.0%, the diffusion coefficients of the BRAA components are 1.52 × 10<sup>−8</sup>, 1.33 × 10<sup>−8</sup>, 3.47 × 10<sup>−8</sup>, 4.82 × 10<sup>−8</sup> and 3.92 × 10<sup>−8</sup>, respectively. Similarly, the corresponding reduction in the complex shear modulus from 1.27 × 10<sup>7</sup> Pa to 4.0 × 10<sup>5</sup> Pa suggests an improvement in the low-temperature properties of BRAA. Overall, the study contributes to the literature on the potential use of soybean-derived bio-oil as a rejuvenator of aged asphalt binders.https://www.mdpi.com/1420-3049/26/23/7080aged asphalt binderbio-oilsoybeandiffusionrheological properties |
| spellingShingle | Xiaorui Zhang Chao Han Xinxing Zhou Frédéric Otto Fan Zhang Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations Molecules aged asphalt binder bio-oil soybean diffusion rheological properties |
| title | Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations |
| title_full | Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations |
| title_fullStr | Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations |
| title_full_unstemmed | Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations |
| title_short | Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations |
| title_sort | characterizing the diffusion and rheological properties of aged asphalt binder rejuvenated with bio oil based on molecular dynamic simulations and laboratory experimentations |
| topic | aged asphalt binder bio-oil soybean diffusion rheological properties |
| url | https://www.mdpi.com/1420-3049/26/23/7080 |
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