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Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts

Although several studies indicated that the addition of Styrene-Butadiene-Styrene (SBS) and Styrene-Butadiene Rubber (SBR) bring a lot of benefits on properties of asphalt binders, high production costs and poor storage stability confine the manufacture of better modified asphalt. To reduce the prod...

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Autores principales: Wei, Jianguo, Shi, Song, Zhou, Yuming, Chen, Zhiyuan, Yu, Fan, Peng, Zhuyi, Duan, Xurui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954187/
https://www.ncbi.nlm.nih.gov/pubmed/35329564
http://dx.doi.org/10.3390/ma15062112
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author Wei, Jianguo
Shi, Song
Zhou, Yuming
Chen, Zhiyuan
Yu, Fan
Peng, Zhuyi
Duan, Xurui
author_facet Wei, Jianguo
Shi, Song
Zhou, Yuming
Chen, Zhiyuan
Yu, Fan
Peng, Zhuyi
Duan, Xurui
author_sort Wei, Jianguo
collection PubMed
description Although several studies indicated that the addition of Styrene-Butadiene-Styrene (SBS) and Styrene-Butadiene Rubber (SBR) bring a lot of benefits on properties of asphalt binders, high production costs and poor storage stability confine the manufacture of better modified asphalt. To reduce the production costs, polyphosphoric acid (PPA) was applied to prepare better compound modified asphalt binders. In this research, five PPA (0.5%, 0.75%, 1.0%, 1.25% and 1.5%) and two SBR/SBS (4% and 6%) concentrations were selected. Dynamic shear rheometer (DSR) and Bending Beam Rheometer (BBR) tests were performed to evaluate the rheological properties of the compound modified asphalt. Rolling Thin Film Oven (RTFO) test was performed to evaluate the aging properties of the compound modified asphalts. The results indicate that SBS/SBR modified asphalts with the addition of PPA show better high-temperature properties significantly, the ability of asphalt to resist rutting is improved, and the elastic recovery is increased. However, the low-temperature properties of the compound modified asphalts are degraded by increasing the creep stiffness (S) and decreasing the creep rate (m). At the same time, RTFO tests results show that PPA was less prone to oxidation to improve the anti-aging ability of modified asphalts. Overall, the combination of 4% SBS and 0.75–1.0% PPA, the combination of 4% SBR and 0.5–0.75% PPA is recommended based on a comprehensive analysis of the performance of compound modified asphalt, respectively, which can be equivalent to 6% SBS/SBR modified asphalt with high-temperature properties, low-temperature properties, temperature sensitivity and aging properties.
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spelling pubmed-89541872022-03-26 Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts Wei, Jianguo Shi, Song Zhou, Yuming Chen, Zhiyuan Yu, Fan Peng, Zhuyi Duan, Xurui Materials (Basel) Article Although several studies indicated that the addition of Styrene-Butadiene-Styrene (SBS) and Styrene-Butadiene Rubber (SBR) bring a lot of benefits on properties of asphalt binders, high production costs and poor storage stability confine the manufacture of better modified asphalt. To reduce the production costs, polyphosphoric acid (PPA) was applied to prepare better compound modified asphalt binders. In this research, five PPA (0.5%, 0.75%, 1.0%, 1.25% and 1.5%) and two SBR/SBS (4% and 6%) concentrations were selected. Dynamic shear rheometer (DSR) and Bending Beam Rheometer (BBR) tests were performed to evaluate the rheological properties of the compound modified asphalt. Rolling Thin Film Oven (RTFO) test was performed to evaluate the aging properties of the compound modified asphalts. The results indicate that SBS/SBR modified asphalts with the addition of PPA show better high-temperature properties significantly, the ability of asphalt to resist rutting is improved, and the elastic recovery is increased. However, the low-temperature properties of the compound modified asphalts are degraded by increasing the creep stiffness (S) and decreasing the creep rate (m). At the same time, RTFO tests results show that PPA was less prone to oxidation to improve the anti-aging ability of modified asphalts. Overall, the combination of 4% SBS and 0.75–1.0% PPA, the combination of 4% SBR and 0.5–0.75% PPA is recommended based on a comprehensive analysis of the performance of compound modified asphalt, respectively, which can be equivalent to 6% SBS/SBR modified asphalt with high-temperature properties, low-temperature properties, temperature sensitivity and aging properties. MDPI 2022-03-13 /pmc/articles/PMC8954187/ /pubmed/35329564 http://dx.doi.org/10.3390/ma15062112 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wei, Jianguo
Shi, Song
Zhou, Yuming
Chen, Zhiyuan
Yu, Fan
Peng, Zhuyi
Duan, Xurui
Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title_full Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title_fullStr Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title_full_unstemmed Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title_short Research on Performance of SBS-PPA and SBR-PPA Compound Modified Asphalts
title_sort research on performance of sbs-ppa and sbr-ppa compound modified asphalts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954187/
https://www.ncbi.nlm.nih.gov/pubmed/35329564
http://dx.doi.org/10.3390/ma15062112
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