Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites

Concrete is the most used construction material in the world; however, its deficiency in shrinkage and low tensile resistance is undeniable. Used as secondary reinforcement, fibers can modify concrete properties in various ways. Carbon-fiber-reinforced concrete is highly suitable to maintain longevi...

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Autores principales:	Maryam Monazami, Rishi Gupta
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	PAN-based carbon fibers polypropylene fiber mechanical properties Scanning Electron Microscopy (SEM) Energy-Dispersive X-ray Spectroscopy (EDS) Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999
Acceso en línea:	https://doaj.org/article/4016a7aa5ed64d04bb84545b146a05f7
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spelling	oai:doaj.org-article:4016a7aa5ed64d04bb84545b146a05f72021-11-25T17:31:14ZInfluence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites10.3390/fib91100652079-6439https://doaj.org/article/4016a7aa5ed64d04bb84545b146a05f72021-10-01T00:00:00Zhttps://www.mdpi.com/2079-6439/9/11/65https://doaj.org/toc/2079-6439Concrete is the most used construction material in the world; however, its deficiency in shrinkage and low tensile resistance is undeniable. Used as secondary reinforcement, fibers can modify concrete properties in various ways. Carbon-fiber-reinforced concrete is highly suitable to maintain longevity of infrastructure where corrosion of steel can shorten the useful service life of the structure while polypropylene fibers can mostly improve the shrinkage of concrete. However, the biggest challenge with fiber-reinforced concrete is the appearance of the poorly structured interfacial transition zone around the fibers. In this study, environmentally friendly and low-cost attempts were made to coat fibers with fly ash to enhance the structure of mortar around the fibers. Coated carbon and polypropylene fibers were used in mortar in single and hybrid forms to investigate the efficiency of fiber coating methods on mechanical and durability properties of fiber-reinforced cement mortar. A minimal dosage of 0.25% and 0.5% (by volume) PAN-based carbon fiber and polypropylene fiber was added to mortar to make low-cost mixes. Compressive, tensile and three-point bending tests were done after 14 and 28 days of curing, and the results were analyzed. The results showed higher compressive strength in coated fiber-reinforced samples and comparable results in tensile strength, flexural strength, and toughness parameters. Scanning Electron Microscopy (SEM) photos and Energy-Dispersive X-ray (EDX) analysis approved the efficacy of the coating methods.Maryam MonazamiRishi GuptaMDPI AGarticlePAN-based carbon fiberspolypropylene fibermechanical propertiesScanning Electron Microscopy (SEM)Energy-Dispersive X-ray Spectroscopy (EDS)Chemicals: Manufacture, use, etc.TP200-248Textile bleaching, dyeing, printing, etc.TP890-933Biology (General)QH301-705.5PhysicsQC1-999ENFibers, Vol 9, Iss 65, p 65 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	PAN-based carbon fibers polypropylene fiber mechanical properties Scanning Electron Microscopy (SEM) Energy-Dispersive X-ray Spectroscopy (EDS) Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999
spellingShingle	PAN-based carbon fibers polypropylene fiber mechanical properties Scanning Electron Microscopy (SEM) Energy-Dispersive X-ray Spectroscopy (EDS) Chemicals: Manufacture, use, etc. TP200-248 Textile bleaching, dyeing, printing, etc. TP890-933 Biology (General) QH301-705.5 Physics QC1-999 Maryam Monazami Rishi Gupta Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
description	Concrete is the most used construction material in the world; however, its deficiency in shrinkage and low tensile resistance is undeniable. Used as secondary reinforcement, fibers can modify concrete properties in various ways. Carbon-fiber-reinforced concrete is highly suitable to maintain longevity of infrastructure where corrosion of steel can shorten the useful service life of the structure while polypropylene fibers can mostly improve the shrinkage of concrete. However, the biggest challenge with fiber-reinforced concrete is the appearance of the poorly structured interfacial transition zone around the fibers. In this study, environmentally friendly and low-cost attempts were made to coat fibers with fly ash to enhance the structure of mortar around the fibers. Coated carbon and polypropylene fibers were used in mortar in single and hybrid forms to investigate the efficiency of fiber coating methods on mechanical and durability properties of fiber-reinforced cement mortar. A minimal dosage of 0.25% and 0.5% (by volume) PAN-based carbon fiber and polypropylene fiber was added to mortar to make low-cost mixes. Compressive, tensile and three-point bending tests were done after 14 and 28 days of curing, and the results were analyzed. The results showed higher compressive strength in coated fiber-reinforced samples and comparable results in tensile strength, flexural strength, and toughness parameters. Scanning Electron Microscopy (SEM) photos and Energy-Dispersive X-ray (EDX) analysis approved the efficacy of the coating methods.
format	article
author	Maryam Monazami Rishi Gupta
author_facet	Maryam Monazami Rishi Gupta
author_sort	Maryam Monazami
title	Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
title_short	Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
title_full	Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
title_fullStr	Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
title_full_unstemmed	Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites
title_sort	influence of polypropylene, carbon and hybrid coated fiber on the interfacial microstructure development of cementitious composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4016a7aa5ed64d04bb84545b146a05f7
work_keys_str_mv	AT maryammonazami influenceofpolypropylenecarbonandhybridcoatedfiberontheinterfacialmicrostructuredevelopmentofcementitiouscomposites AT rishigupta influenceofpolypropylenecarbonandhybridcoatedfiberontheinterfacialmicrostructuredevelopmentofcementitiouscomposites
_version_	1718412217530974208

Influence of Polypropylene, Carbon and Hybrid Coated Fiber on the Interfacial Microstructure Development of Cementitious Composites

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