Dynamic Performance of Foam Concrete With Recycled Coir Fiber
Foam concrete, a new kind of building material, has attracted wide attention due to its high energy absorption capability and low density. However, the low strength and poor toughness of foam concrete have become obstacles to hinder its further application. Coir fiber (CF), as a renewable recycled p...
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Frontiers Media S.A.
2020-10-01
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Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2020.567655/full |
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author | Junping Zhang Jing Li Liwen Zhang Zhouqiang Liu Zuqian Jiang |
author_facet | Junping Zhang Jing Li Liwen Zhang Zhouqiang Liu Zuqian Jiang |
author_sort | Junping Zhang |
collection | DOAJ |
description | Foam concrete, a new kind of building material, has attracted wide attention due to its high energy absorption capability and low density. However, the low strength and poor toughness of foam concrete have become obstacles to hinder its further application. Coir fiber (CF), as a renewable recycled plant fiber, has shown a significant effectiveness for improving the mechanical properties of cement-based materials in some previous studies. In this paper, CF was introduced into foam concrete to develop its dynamic performance. A total of 54 foam concrete specimens with different CF contents (0.0%, 0.5%, 1.0%, 1.5%, 2.0%, and 2.5%) were prepared and divided into six groups. A single-impact test was carried out at three driving gas pressures (0.20, 0.25, and 0.30 MPa) by means of Split Hopkinson pressure bar experimental technology to investigate the effect of CF content on the dynamic performance of foam concrete, including the failure mode, dynamic compressive strength, stress-strain behavior, and energy absorption capacity. Furthermore, to explain the change mechanism of CF-foam concrete, a microstructure analysis was conducted through a scanning electron microscope and X-ray diffraction. The results revealed that an appropriate amount of CF could significantly improve the dynamic performance of foam concrete. The foam concrete’s ductility attained an optimal level at the CF content of 1.5%. The dynamic compressive strengths reached their highest values of 2.27 MPa (at 0.20 MPa gas pressure), 3.18 MPa (at 0.25 MPa gas pressure), and 4.21 MPa (at 0.30 MPa gas pressure) at the CF content of 1.5%. The peak values of energy absorption were 8.9 J (at 0.20 MPa gas pressure) at a CF content of 2.0%, 14.9 J (at 0.25 MPa gas pressure) at a CF content of 1.5%, and 22.4 J (at 0.30 MPa gas pressure) at a CF content of 1.5%, respectively. However, this improvement would deteriorate when CF was in excess. |
first_indexed | 2024-12-19T10:29:04Z |
format | Article |
id | doaj.art-2219b29c12b740b4bc87ed568f5bf8ad |
institution | Directory Open Access Journal |
issn | 2296-8016 |
language | English |
last_indexed | 2024-12-19T10:29:04Z |
publishDate | 2020-10-01 |
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series | Frontiers in Materials |
spelling | doaj.art-2219b29c12b740b4bc87ed568f5bf8ad2022-12-21T20:25:48ZengFrontiers Media S.A.Frontiers in Materials2296-80162020-10-01710.3389/fmats.2020.567655567655Dynamic Performance of Foam Concrete With Recycled Coir FiberJunping Zhang0Jing Li1Liwen Zhang2Zhouqiang Liu3Zuqian Jiang4Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou, ChinaFoam concrete, a new kind of building material, has attracted wide attention due to its high energy absorption capability and low density. However, the low strength and poor toughness of foam concrete have become obstacles to hinder its further application. Coir fiber (CF), as a renewable recycled plant fiber, has shown a significant effectiveness for improving the mechanical properties of cement-based materials in some previous studies. In this paper, CF was introduced into foam concrete to develop its dynamic performance. A total of 54 foam concrete specimens with different CF contents (0.0%, 0.5%, 1.0%, 1.5%, 2.0%, and 2.5%) were prepared and divided into six groups. A single-impact test was carried out at three driving gas pressures (0.20, 0.25, and 0.30 MPa) by means of Split Hopkinson pressure bar experimental technology to investigate the effect of CF content on the dynamic performance of foam concrete, including the failure mode, dynamic compressive strength, stress-strain behavior, and energy absorption capacity. Furthermore, to explain the change mechanism of CF-foam concrete, a microstructure analysis was conducted through a scanning electron microscope and X-ray diffraction. The results revealed that an appropriate amount of CF could significantly improve the dynamic performance of foam concrete. The foam concrete’s ductility attained an optimal level at the CF content of 1.5%. The dynamic compressive strengths reached their highest values of 2.27 MPa (at 0.20 MPa gas pressure), 3.18 MPa (at 0.25 MPa gas pressure), and 4.21 MPa (at 0.30 MPa gas pressure) at the CF content of 1.5%. The peak values of energy absorption were 8.9 J (at 0.20 MPa gas pressure) at a CF content of 2.0%, 14.9 J (at 0.25 MPa gas pressure) at a CF content of 1.5%, and 22.4 J (at 0.30 MPa gas pressure) at a CF content of 1.5%, respectively. However, this improvement would deteriorate when CF was in excess.https://www.frontiersin.org/articles/10.3389/fmats.2020.567655/fullfoam concretecoir fiberdynamic performanceimpact experimentsmicrostructure |
spellingShingle | Junping Zhang Jing Li Liwen Zhang Zhouqiang Liu Zuqian Jiang Dynamic Performance of Foam Concrete With Recycled Coir Fiber Frontiers in Materials foam concrete coir fiber dynamic performance impact experiments microstructure |
title | Dynamic Performance of Foam Concrete With Recycled Coir Fiber |
title_full | Dynamic Performance of Foam Concrete With Recycled Coir Fiber |
title_fullStr | Dynamic Performance of Foam Concrete With Recycled Coir Fiber |
title_full_unstemmed | Dynamic Performance of Foam Concrete With Recycled Coir Fiber |
title_short | Dynamic Performance of Foam Concrete With Recycled Coir Fiber |
title_sort | dynamic performance of foam concrete with recycled coir fiber |
topic | foam concrete coir fiber dynamic performance impact experiments microstructure |
url | https://www.frontiersin.org/articles/10.3389/fmats.2020.567655/full |
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