Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete

In this work, to reduce the probability of brittle failure in the support structure of deeply buried high-stress soft rock roadways, hybrid-fiber reinforced rubber concrete (HFRRC) was investigated using the orthogonal test, and the effects of various factors on the performance were studied. The mec...

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Autores principales:	Yushan Liu, Jianyong Pang, Qiaoqiao Chen, Weijing Yao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	rubber concrete basalt fiber polyvinyl alcohol fiber pore structure Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/103a5bff633b49279020fbb684119031
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spelling	oai:doaj.org-article:103a5bff633b49279020fbb6841190312021-11-25T17:18:02ZStudy on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete10.3390/cryst111113072073-4352https://doaj.org/article/103a5bff633b49279020fbb6841190312021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1307https://doaj.org/toc/2073-4352In this work, to reduce the probability of brittle failure in the support structure of deeply buried high-stress soft rock roadways, hybrid-fiber reinforced rubber concrete (HFRRC) was investigated using the orthogonal test, and the effects of various factors on the performance were studied. The mechanical properties, pore structure, and microstructure of rubber concrete reinforced by basalt fiber (BF) and polyvinyl alcohol fiber (PF) were studied from macroscale, mesoscale, and microscale perspectives. The results revealed that the content of the rubber particles has a significant impact on strength. Further, the addition of the hybrid fibers to the concrete was found to have a positive effect on the splitting tensile strength and the flexural strength. However, no significant effect was observed on the compressive strength. Furthermore, it was found that the content of BF and PF have a significant impact on the energy dissipation capacity and ductility, and the influence of the PF content is greater than that of the BF content. The concrete with 10% rubber particles of 1–3 mm, a volume fraction 0.3% basalt fiber, and a volume fraction 0.2% polyvinyl alcohol fiber was obtained as the optimal mix proportions. Moreover, it was found that the random distribution of the rubber particles and the hybrid fibers optimized the pore structure, inhibited the expansion of the cracks, and reduced the brittleness of the concrete. The findings of this study can provide a useful reference for the application of an environmentally friendly material with recycled rubber aggregate and hybrid fiber.Yushan LiuJianyong PangQiaoqiao ChenWeijing YaoMDPI AGarticlerubber concretebasalt fiberpolyvinyl alcohol fiberpore structureCrystallographyQD901-999ENCrystals, Vol 11, Iss 1307, p 1307 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rubber concrete basalt fiber polyvinyl alcohol fiber pore structure Crystallography QD901-999
spellingShingle	rubber concrete basalt fiber polyvinyl alcohol fiber pore structure Crystallography QD901-999 Yushan Liu Jianyong Pang Qiaoqiao Chen Weijing Yao Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
description	In this work, to reduce the probability of brittle failure in the support structure of deeply buried high-stress soft rock roadways, hybrid-fiber reinforced rubber concrete (HFRRC) was investigated using the orthogonal test, and the effects of various factors on the performance were studied. The mechanical properties, pore structure, and microstructure of rubber concrete reinforced by basalt fiber (BF) and polyvinyl alcohol fiber (PF) were studied from macroscale, mesoscale, and microscale perspectives. The results revealed that the content of the rubber particles has a significant impact on strength. Further, the addition of the hybrid fibers to the concrete was found to have a positive effect on the splitting tensile strength and the flexural strength. However, no significant effect was observed on the compressive strength. Furthermore, it was found that the content of BF and PF have a significant impact on the energy dissipation capacity and ductility, and the influence of the PF content is greater than that of the BF content. The concrete with 10% rubber particles of 1–3 mm, a volume fraction 0.3% basalt fiber, and a volume fraction 0.2% polyvinyl alcohol fiber was obtained as the optimal mix proportions. Moreover, it was found that the random distribution of the rubber particles and the hybrid fibers optimized the pore structure, inhibited the expansion of the cracks, and reduced the brittleness of the concrete. The findings of this study can provide a useful reference for the application of an environmentally friendly material with recycled rubber aggregate and hybrid fiber.
format	article
author	Yushan Liu Jianyong Pang Qiaoqiao Chen Weijing Yao
author_facet	Yushan Liu Jianyong Pang Qiaoqiao Chen Weijing Yao
author_sort	Yushan Liu
title	Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
title_short	Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
title_full	Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
title_fullStr	Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
title_full_unstemmed	Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete
title_sort	study on mechanical properties and pore structure of hybrid fiber reinforced rubber concrete
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/103a5bff633b49279020fbb684119031
work_keys_str_mv	AT yushanliu studyonmechanicalpropertiesandporestructureofhybridfiberreinforcedrubberconcrete AT jianyongpang studyonmechanicalpropertiesandporestructureofhybridfiberreinforcedrubberconcrete AT qiaoqiaochen studyonmechanicalpropertiesandporestructureofhybridfiberreinforcedrubberconcrete AT weijingyao studyonmechanicalpropertiesandporestructureofhybridfiberreinforcedrubberconcrete
_version_	1718412512197607424

Study on Mechanical Properties and Pore Structure of Hybrid Fiber Reinforced Rubber Concrete

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