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Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites
In order to solve issues related to bridge girders, expansion devices and road surfaces, as well as other structures that are prone to fatigue failure, a kind of fatigue-resistant elastic polyurethane concrete (EPUC) was obtained by adding waste rubber particles (40 mesh with 10% fine aggregate volu...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8303921/ https://www.ncbi.nlm.nih.gov/pubmed/34300759 http://dx.doi.org/10.3390/ma14143839 |
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author | Jia, Zhen Jia, Dongzhe Sun, Quansheng Wang, Yanqi Ding, Hongjian |
author_facet | Jia, Zhen Jia, Dongzhe Sun, Quansheng Wang, Yanqi Ding, Hongjian |
author_sort | Jia, Zhen |
collection | PubMed |
description | In order to solve issues related to bridge girders, expansion devices and road surfaces, as well as other structures that are prone to fatigue failure, a kind of fatigue-resistant elastic polyurethane concrete (EPUC) was obtained by adding waste rubber particles (40 mesh with 10% fine aggregate volume replacement rate) to conventional engineering polyurethane concrete (PUC). Based on the preparation and properties of EPUC, its constitutive relation was proposed through compression and tensile tests; then, a scanning electron microscope (SEM), an atomic force microscope (AFM) and a 3D non-contact surface profilometer were used to study the failure morphology and micromechanisms of EPUC. On this basis, four-point bending fatigue tests of EPUC were carried out at different temperature levels (−20 °C, 0 °C, 20 °C) and different strain levels (400 με~1200 με). These were used to analyze the stiffness modulus, hysteresis angle and dissipated energy of EPUC, and our results outline the fatigue life prediction models of EPUC at different temperatures. The results show that the addition of rubber particles fills the interior of EPUC with tiny elastic structures and effectively optimizes the interface bonding between aggregate and polyurethane. In addition, EPUC has good mechanical properties and excellent fatigue resistance; the fatigue life of EPUC at a room temperature of 600 με can grow by more than two million times, and it also has a longer service life and reduced disease frequency, as well as fewer maintenance requirements. This paper will provide a theoretical and design basis for the fatigue resistance design and engineering application of building materials. Meanwhile, the new EPUC material has broad application potential in terms of roads, bridges and green buildings. |
format | Online Article Text |
id | pubmed-8303921 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-83039212021-07-25 Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites Jia, Zhen Jia, Dongzhe Sun, Quansheng Wang, Yanqi Ding, Hongjian Materials (Basel) Article In order to solve issues related to bridge girders, expansion devices and road surfaces, as well as other structures that are prone to fatigue failure, a kind of fatigue-resistant elastic polyurethane concrete (EPUC) was obtained by adding waste rubber particles (40 mesh with 10% fine aggregate volume replacement rate) to conventional engineering polyurethane concrete (PUC). Based on the preparation and properties of EPUC, its constitutive relation was proposed through compression and tensile tests; then, a scanning electron microscope (SEM), an atomic force microscope (AFM) and a 3D non-contact surface profilometer were used to study the failure morphology and micromechanisms of EPUC. On this basis, four-point bending fatigue tests of EPUC were carried out at different temperature levels (−20 °C, 0 °C, 20 °C) and different strain levels (400 με~1200 με). These were used to analyze the stiffness modulus, hysteresis angle and dissipated energy of EPUC, and our results outline the fatigue life prediction models of EPUC at different temperatures. The results show that the addition of rubber particles fills the interior of EPUC with tiny elastic structures and effectively optimizes the interface bonding between aggregate and polyurethane. In addition, EPUC has good mechanical properties and excellent fatigue resistance; the fatigue life of EPUC at a room temperature of 600 με can grow by more than two million times, and it also has a longer service life and reduced disease frequency, as well as fewer maintenance requirements. This paper will provide a theoretical and design basis for the fatigue resistance design and engineering application of building materials. Meanwhile, the new EPUC material has broad application potential in terms of roads, bridges and green buildings. MDPI 2021-07-09 /pmc/articles/PMC8303921/ /pubmed/34300759 http://dx.doi.org/10.3390/ma14143839 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 Jia, Zhen Jia, Dongzhe Sun, Quansheng Wang, Yanqi Ding, Hongjian Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title | Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title_full | Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title_fullStr | Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title_full_unstemmed | Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title_short | Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites |
title_sort | preparation and mechanical-fatigue properties of elastic polyurethane concrete composites |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8303921/ https://www.ncbi.nlm.nih.gov/pubmed/34300759 http://dx.doi.org/10.3390/ma14143839 |
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