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Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders

Effective thermal conduction modification in asphalt binders is beneficial to reducing pavement surface temperature and relieving the urban heat island (UHI) effect in the utilization of solar harvesting and snow melting pavements. This study investigated the performance of two nanometer-sized modif...

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Autores principales: Li, Zhelun, Yu, Xin, Liang, Yangshi, Wu, Shaopeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156440/
https://www.ncbi.nlm.nih.gov/pubmed/34065671
http://dx.doi.org/10.3390/ma14102585
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author Li, Zhelun
Yu, Xin
Liang, Yangshi
Wu, Shaopeng
author_facet Li, Zhelun
Yu, Xin
Liang, Yangshi
Wu, Shaopeng
author_sort Li, Zhelun
collection PubMed
description Effective thermal conduction modification in asphalt binders is beneficial to reducing pavement surface temperature and relieving the urban heat island (UHI) effect in the utilization of solar harvesting and snow melting pavements. This study investigated the performance of two nanometer-sized modifiers, graphene (Gr) and carbon nanotubes (CNTs), on enhancing the thermal, physical and rheological properties of asphalt binders. Measurements depending on a transient plant source method proved that both Gr and CNTs linearly increased the thermal conductivity and thermal diffusivity of asphalt binders, and while 5% Gr by volume of matrix asphalt contributed to 300% increments, 5% CNTs increased the two parameters of asphalt binders by nearly 72% at 20 °C. Meanwhile, a series of empirical and rheological properties experiments were conducted. The results demonstrated the temperature susceptibility reduction and high-temperature properties promotion of asphalt binders by adding Gr or CNTs. The variation trends in the anti-cracking properties of asphalt binders modified by Gr and CNTs with the modifier content differed at low temperatures, which may be due to the unique nature of Gr. In conclusion, Gr, whose optimal content is 3% by volume of matrix asphalt, provides superior application potential for solar harvesting and snow melting pavements in comparison to CNTs due to its comprehensive contributions to thermal properties, construction feasibility, high-temperature performance and low-temperature performance of asphalt binders.
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spelling pubmed-81564402021-05-28 Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders Li, Zhelun Yu, Xin Liang, Yangshi Wu, Shaopeng Materials (Basel) Article Effective thermal conduction modification in asphalt binders is beneficial to reducing pavement surface temperature and relieving the urban heat island (UHI) effect in the utilization of solar harvesting and snow melting pavements. This study investigated the performance of two nanometer-sized modifiers, graphene (Gr) and carbon nanotubes (CNTs), on enhancing the thermal, physical and rheological properties of asphalt binders. Measurements depending on a transient plant source method proved that both Gr and CNTs linearly increased the thermal conductivity and thermal diffusivity of asphalt binders, and while 5% Gr by volume of matrix asphalt contributed to 300% increments, 5% CNTs increased the two parameters of asphalt binders by nearly 72% at 20 °C. Meanwhile, a series of empirical and rheological properties experiments were conducted. The results demonstrated the temperature susceptibility reduction and high-temperature properties promotion of asphalt binders by adding Gr or CNTs. The variation trends in the anti-cracking properties of asphalt binders modified by Gr and CNTs with the modifier content differed at low temperatures, which may be due to the unique nature of Gr. In conclusion, Gr, whose optimal content is 3% by volume of matrix asphalt, provides superior application potential for solar harvesting and snow melting pavements in comparison to CNTs due to its comprehensive contributions to thermal properties, construction feasibility, high-temperature performance and low-temperature performance of asphalt binders. MDPI 2021-05-16 /pmc/articles/PMC8156440/ /pubmed/34065671 http://dx.doi.org/10.3390/ma14102585 Text en © 2021 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
Li, Zhelun
Yu, Xin
Liang, Yangshi
Wu, Shaopeng
Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title_full Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title_fullStr Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title_full_unstemmed Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title_short Carbon Nanomaterials for Enhancing the Thermal, Physical and Rheological Properties of Asphalt Binders
title_sort carbon nanomaterials for enhancing the thermal, physical and rheological properties of asphalt binders
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156440/
https://www.ncbi.nlm.nih.gov/pubmed/34065671
http://dx.doi.org/10.3390/ma14102585
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