Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete

The effects of polyvinyl alcohol (PVA) fiber content on mechanical and fracture properties of geopolymer concrete (GPC) were investigated in the present study. Mechanical properties include cubic compressive, prism compressive, tensile and flexural strengths, and elastic modulus. The evaluation indi...

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Main Authors: Zhang Peng, Han Xu, Zheng Yuanxun, Wan Jinyi, Hui David
Format: Article
Language:English
Published: De Gruyter 2021-07-01
Series:Reviews on Advanced Materials Science
Subjects:
Online Access:https://doi.org/10.1515/rams-2021-0039
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spelling doaj-e4a1bef48d754a1aa2a3c9297201e3692021-10-03T07:42:43ZengDe GruyterReviews on Advanced Materials Science1605-81272021-07-0160141843710.1515/rams-2021-0039Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concreteZhang Peng0Han Xu1Zheng Yuanxun2Wan Jinyi3Hui David4School of Water Conservancy Engineering, Zhengzhou University, No. 100, Science Avenue, Henan Province, Zhengzhou 450001, People’s Republic of ChinaSchool of Water Conservancy Engineering, Zhengzhou University, No. 100, Science Avenue, Henan Province, Zhengzhou 450001, People’s Republic of ChinaSchool of Water Conservancy Engineering, Zhengzhou University, No. 100, Science Avenue, Henan Province, Zhengzhou 450001, People’s Republic of ChinaSchool of Water Conservancy Engineering, Zhengzhou University, No. 100, Science Avenue, Henan Province, Zhengzhou 450001, People’s Republic of ChinaDepartment of Mechanical Engineering, University of New Orleans, New Orleans, LA 70148, United States of AmericaThe effects of polyvinyl alcohol (PVA) fiber content on mechanical and fracture properties of geopolymer concrete (GPC) were investigated in the present study. Mechanical properties include cubic compressive, prism compressive, tensile and flexural strengths, and elastic modulus. The evaluation indices in fracture properties were measured by using the three-point bending test. Geopolymer was prepared by fly ash, metakaolin, and alkali activator, which was obtained by mixing sodium hydroxide and sodium silicate solutions. The volume fractions of PVA fiber (length 12 mm and diameter 40 μm) were 0, 0.2, 0.4, 0.6, 0.8, and 1.0%. The results indicate that the effects of the PVA fiber on the cubic and prism compressive strengths and elastic modulus are similar. A tendency of first increasing and then decreasing with the increase in the PVA fiber content was observed in these properties. They all reached a maximum at 0.2% PVA fiber content. There was also a similar tendency of first increase and then decrease for tensile and flexural strengths, peak load, critical effective crack lengths, fracture toughness, and fracture energy of GPC, which were significantly improved by the PVA fiber. They reached a maximum at 0.8% PVA fiber content, except the tensile strength whose maximum was at 1.0% PVA fiber volume fraction. Considering the parameters analyzed, it seems that the 0.8% PVA fiber content provides optimal reinforcement of the mechanical properties of GPC.https://doi.org/10.1515/rams-2021-0039geopolymer concretepva fibermechanical propertiesfracture performance
collection DOAJ
language English
format Article
sources DOAJ
author Zhang Peng
Han Xu
Zheng Yuanxun
Wan Jinyi
Hui David
spellingShingle Zhang Peng
Han Xu
Zheng Yuanxun
Wan Jinyi
Hui David
Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
Reviews on Advanced Materials Science
geopolymer concrete
pva fiber
mechanical properties
fracture performance
author_facet Zhang Peng
Han Xu
Zheng Yuanxun
Wan Jinyi
Hui David
author_sort Zhang Peng
title Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
title_short Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
title_full Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
title_fullStr Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
title_full_unstemmed Effect of PVA fiber on mechanical properties of fly ash-based geopolymer concrete
title_sort effect of pva fiber on mechanical properties of fly ash-based geopolymer concrete
publisher De Gruyter
series Reviews on Advanced Materials Science
issn 1605-8127
publishDate 2021-07-01
description The effects of polyvinyl alcohol (PVA) fiber content on mechanical and fracture properties of geopolymer concrete (GPC) were investigated in the present study. Mechanical properties include cubic compressive, prism compressive, tensile and flexural strengths, and elastic modulus. The evaluation indices in fracture properties were measured by using the three-point bending test. Geopolymer was prepared by fly ash, metakaolin, and alkali activator, which was obtained by mixing sodium hydroxide and sodium silicate solutions. The volume fractions of PVA fiber (length 12 mm and diameter 40 μm) were 0, 0.2, 0.4, 0.6, 0.8, and 1.0%. The results indicate that the effects of the PVA fiber on the cubic and prism compressive strengths and elastic modulus are similar. A tendency of first increasing and then decreasing with the increase in the PVA fiber content was observed in these properties. They all reached a maximum at 0.2% PVA fiber content. There was also a similar tendency of first increase and then decrease for tensile and flexural strengths, peak load, critical effective crack lengths, fracture toughness, and fracture energy of GPC, which were significantly improved by the PVA fiber. They reached a maximum at 0.8% PVA fiber content, except the tensile strength whose maximum was at 1.0% PVA fiber volume fraction. Considering the parameters analyzed, it seems that the 0.8% PVA fiber content provides optimal reinforcement of the mechanical properties of GPC.
topic geopolymer concrete
pva fiber
mechanical properties
fracture performance
url https://doi.org/10.1515/rams-2021-0039
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AT wanjinyi effectofpvafiberonmechanicalpropertiesofflyashbasedgeopolymerconcrete
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