Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials

The uniaxial tensile properties of multi-scale fiber-reinforced cementitious material (MSFRCM) with steel and polyvinyl alcohol (PVA) fibers and calcium carbonate whisker (CW) were studied. The results showed that CW improved the uniaxial tensile stiffness, strength, peak strain, and toughness of t...

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Main Authors: L. Li, M. Cao, Z. Li, W. Zhang, D. Shi, K. Shi
Format: Article
Language:English
Published: Consejo Superior de Investigaciones Científicas 2022-02-01
Series:Materiales de Construccion
Subjects:
Online Access:https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2539
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author L. Li
M. Cao
Z. Li
W. Zhang
D. Shi
K. Shi
author_facet L. Li
M. Cao
Z. Li
W. Zhang
D. Shi
K. Shi
author_sort L. Li
collection DOAJ
description The uniaxial tensile properties of multi-scale fiber-reinforced cementitious material (MSFRCM) with steel and polyvinyl alcohol (PVA) fibers and calcium carbonate whisker (CW) were studied. The results showed that CW improved the uniaxial tensile stiffness, strength, peak strain, and toughness of the steel-PVA hybrid fiber-reinforced cementitious material. The CW not only played a role in the small deformation stage but also improved the load holding capacity and toughness of the hybrid fiber-reinforced cementitious material during the large deformation stage. Computational models to assess the uniaxial tensile strength and toughness of the MSFRCM were established. Microstructure observations showed that the steel and PVA fibers formed a weak interfacial transition zone (ITZ) due to the “wall effect.” The CW effectively optimized the structure of the ITZ of the steel and PVA fibers through physical and chemical effects, such as filling, bridging, improving Ca(OH)2 orientation, and chemical effects. The steel fibers, PVA fibers, and CW in the MSFRCM bridged cracks at the macro, mesoscopic, and microscopic levels, respectively. As a result, we observed a fiber chain effect that improved the positive hybrid effect between the multi-scale fibers.
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spelling doaj.art-237e77937f1b491384c0b559b7e05f7b2022-12-21T22:51:28ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262022-02-017234510.3989/mc.2022.05521Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materialsL. Li0M. Cao1Z. Li2W. Zhang3D. Shi4K. Shi5Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University - - College of Water Resources and Architectural Engineering, Northwest A&F University - Faculty of Infrastructure Engineering, Dalian University of Technology - State Key Laboratory of Green Building Materials, China Building Materials AcademyFaculty of Infrastructure Engineering, Dalian University of TechnologyKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University - College of Water Resources and Architectural Engineering, Northwest A&F UniversityState Key Laboratory of Green Building Materials, China Building Materials AcademyState Key Laboratory of Green Building Materials, China Building Materials AcademySchool of Civil Engineering and Architecture, Zhengzhou University of Aeronautics The uniaxial tensile properties of multi-scale fiber-reinforced cementitious material (MSFRCM) with steel and polyvinyl alcohol (PVA) fibers and calcium carbonate whisker (CW) were studied. The results showed that CW improved the uniaxial tensile stiffness, strength, peak strain, and toughness of the steel-PVA hybrid fiber-reinforced cementitious material. The CW not only played a role in the small deformation stage but also improved the load holding capacity and toughness of the hybrid fiber-reinforced cementitious material during the large deformation stage. Computational models to assess the uniaxial tensile strength and toughness of the MSFRCM were established. Microstructure observations showed that the steel and PVA fibers formed a weak interfacial transition zone (ITZ) due to the “wall effect.” The CW effectively optimized the structure of the ITZ of the steel and PVA fibers through physical and chemical effects, such as filling, bridging, improving Ca(OH)2 orientation, and chemical effects. The steel fibers, PVA fibers, and CW in the MSFRCM bridged cracks at the macro, mesoscopic, and microscopic levels, respectively. As a result, we observed a fiber chain effect that improved the positive hybrid effect between the multi-scale fibers. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2539Hybrid fiberCaCO3 whiskerCementitious materialUniaxial tensile propertyCalculationsMicro-mechanism
spellingShingle L. Li
M. Cao
Z. Li
W. Zhang
D. Shi
K. Shi
Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
Materiales de Construccion
Hybrid fiber
CaCO3 whisker
Cementitious material
Uniaxial tensile property
Calculations
Micro-mechanism
title Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
title_full Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
title_fullStr Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
title_full_unstemmed Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
title_short Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials
title_sort uniaxial tensile behavior and mechanism characterization of multi scale fiber reinforced cementitious materials
topic Hybrid fiber
CaCO3 whisker
Cementitious material
Uniaxial tensile property
Calculations
Micro-mechanism
url https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2539
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