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Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar

On the basis of a modified three-dimensional (3D) random distribution fiber model, this study further investigates the flexural–tensile rheological behavior and its influence factors of fiber-reinforced asphalt mortar. First, the viscoelastic creep at a temperature of 15 °C for pure asphalt mortar a...

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Autores principales: Zhang, Xiaoyuan, Xu, Li, Lv, Junxiu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564610/
https://www.ncbi.nlm.nih.gov/pubmed/32872673
http://dx.doi.org/10.3390/polym12091970
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author Zhang, Xiaoyuan
Xu, Li
Lv, Junxiu
author_facet Zhang, Xiaoyuan
Xu, Li
Lv, Junxiu
author_sort Zhang, Xiaoyuan
collection PubMed
description On the basis of a modified three-dimensional (3D) random distribution fiber model, this study further investigates the flexural–tensile rheological behavior and its influence factors of fiber-reinforced asphalt mortar. First, the viscoelastic creep at a temperature of 15 °C for pure asphalt mortar as the control sample are obtained by the beam bending creep test to fit the Burgers constitutive parameters. Second, a 3D numerical model consisting of a homogeneous asphalt mortar matrix with viscoelastic parameters and short and straight fibers with elastic characteristics is built in a cuboid space on the basis of a fiber algorithm to simulate the flexural–tensile rheological behavior using ABAQUS software, and the rheological behavior of the 3D model is consistent with those of the test result. Finally, 3D numerical simulations are conducted to further analyze the effect of fiber factors (e.g., contents, aspect ratios, modulus, and fiber types) on the rheological behavior. Results show that the effect of basalt fiber (BF) compared with steel wool fiber are more significant, and increasing fiber contents and aspect ratios have a positive reinforcement effect on the rheological behavior, where BF content for 0.1%, 0.2%, and 0.3% at 3600 s compared with the control reduced by 37.5%, 53%, and 61.7%, and BF aspect ratios for 30, 40, and 50 compared with that for 20 increased by 4.3%, 16.1%, and 32.9%, respectively, but the change in fiber modulus has a minimal impact.
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spelling pubmed-75646102020-10-27 Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar Zhang, Xiaoyuan Xu, Li Lv, Junxiu Polymers (Basel) Article On the basis of a modified three-dimensional (3D) random distribution fiber model, this study further investigates the flexural–tensile rheological behavior and its influence factors of fiber-reinforced asphalt mortar. First, the viscoelastic creep at a temperature of 15 °C for pure asphalt mortar as the control sample are obtained by the beam bending creep test to fit the Burgers constitutive parameters. Second, a 3D numerical model consisting of a homogeneous asphalt mortar matrix with viscoelastic parameters and short and straight fibers with elastic characteristics is built in a cuboid space on the basis of a fiber algorithm to simulate the flexural–tensile rheological behavior using ABAQUS software, and the rheological behavior of the 3D model is consistent with those of the test result. Finally, 3D numerical simulations are conducted to further analyze the effect of fiber factors (e.g., contents, aspect ratios, modulus, and fiber types) on the rheological behavior. Results show that the effect of basalt fiber (BF) compared with steel wool fiber are more significant, and increasing fiber contents and aspect ratios have a positive reinforcement effect on the rheological behavior, where BF content for 0.1%, 0.2%, and 0.3% at 3600 s compared with the control reduced by 37.5%, 53%, and 61.7%, and BF aspect ratios for 30, 40, and 50 compared with that for 20 increased by 4.3%, 16.1%, and 32.9%, respectively, but the change in fiber modulus has a minimal impact. MDPI 2020-08-30 /pmc/articles/PMC7564610/ /pubmed/32872673 http://dx.doi.org/10.3390/polym12091970 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
Zhang, Xiaoyuan
Xu, Li
Lv, Junxiu
Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title_full Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title_fullStr Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title_full_unstemmed Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title_short Investigation on the Flexural–Tensile Rheological Behavior and Its Influence Factors of Fiber-Reinforced Asphalt Mortar
title_sort investigation on the flexural–tensile rheological behavior and its influence factors of fiber-reinforced asphalt mortar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564610/
https://www.ncbi.nlm.nih.gov/pubmed/32872673
http://dx.doi.org/10.3390/polym12091970
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