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Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity

Water-foamed asphalt is capable of improving the workability of asphalt mixture. It has been extensively used for its energy-saving and emission-reducing features. Water plays an essential part in improving the workability of water-foamed asphalt mixture. However, there is still lack in profound stu...

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Autores principales: Li, Ning, Tang, Wei, Yu, Xin, Zhan, He, Ma, Hui, Ding, Gongying, Zhang, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7727802/
https://www.ncbi.nlm.nih.gov/pubmed/33255465
http://dx.doi.org/10.3390/ma13235325
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author Li, Ning
Tang, Wei
Yu, Xin
Zhan, He
Ma, Hui
Ding, Gongying
Zhang, Yu
author_facet Li, Ning
Tang, Wei
Yu, Xin
Zhan, He
Ma, Hui
Ding, Gongying
Zhang, Yu
author_sort Li, Ning
collection PubMed
description Water-foamed asphalt is capable of improving the workability of asphalt mixture. It has been extensively used for its energy-saving and emission-reducing features. Water plays an essential part in improving the workability of water-foamed asphalt mixture. However, there is still lack in profound studies of moisture dissipation of the water-foamed asphalt over time and its influence on workability. In this study, the evolutions of residual water content and rotational viscosity of the water-foamed asphalt with time were respectively measured by the analytical balance and modified rotational viscometer (RV). The atomic force microscopy (AFM) analysis was conducted to discuss the mechanism of viscosity reduction of water-foamed asphalt. The results showed that moisture evaporation is significantly influenced by the foaming water content and ambient temperature, which results in the different stabilizing time of water-foamed asphalt. When water-foamed asphalt was stabilized, the residual water inside the asphalt was less than 0.01% relative to the asphalt mass. The AFM analysis showed that the foaming process changed the distribution of wax in the water-foamed asphalt resulting in reduction of viscosity. The viscosity reduction of asphalt is highly related to the initial foaming water content. After the foaming process, the viscosity keeps stable and is independent of moisture dissipation.
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spelling pubmed-77278022020-12-11 Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity Li, Ning Tang, Wei Yu, Xin Zhan, He Ma, Hui Ding, Gongying Zhang, Yu Materials (Basel) Article Water-foamed asphalt is capable of improving the workability of asphalt mixture. It has been extensively used for its energy-saving and emission-reducing features. Water plays an essential part in improving the workability of water-foamed asphalt mixture. However, there is still lack in profound studies of moisture dissipation of the water-foamed asphalt over time and its influence on workability. In this study, the evolutions of residual water content and rotational viscosity of the water-foamed asphalt with time were respectively measured by the analytical balance and modified rotational viscometer (RV). The atomic force microscopy (AFM) analysis was conducted to discuss the mechanism of viscosity reduction of water-foamed asphalt. The results showed that moisture evaporation is significantly influenced by the foaming water content and ambient temperature, which results in the different stabilizing time of water-foamed asphalt. When water-foamed asphalt was stabilized, the residual water inside the asphalt was less than 0.01% relative to the asphalt mass. The AFM analysis showed that the foaming process changed the distribution of wax in the water-foamed asphalt resulting in reduction of viscosity. The viscosity reduction of asphalt is highly related to the initial foaming water content. After the foaming process, the viscosity keeps stable and is independent of moisture dissipation. MDPI 2020-11-24 /pmc/articles/PMC7727802/ /pubmed/33255465 http://dx.doi.org/10.3390/ma13235325 Text en © 2020 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
Li, Ning
Tang, Wei
Yu, Xin
Zhan, He
Ma, Hui
Ding, Gongying
Zhang, Yu
Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title_full Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title_fullStr Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title_full_unstemmed Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title_short Investigation of Moisture Dissipation of Water-Foamed Asphalt and Its Influence on the Viscosity
title_sort investigation of moisture dissipation of water-foamed asphalt and its influence on the viscosity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7727802/
https://www.ncbi.nlm.nih.gov/pubmed/33255465
http://dx.doi.org/10.3390/ma13235325
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