Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams

There are ongoing research efforts directed at addressing strength limitations of compressed earth blocks (CEB) that inhibit their deployment for structural applications, particularly in areas where masonry systems are regularly subjected to lateral loads from high winds. In this paper, the authors...

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Autores principales:	Peter Donkor, Esther Obonyo, Christopher Ferraro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	compressed earth blocks polypropylene fibers equivalent flexural strength residual strength flexural toughness Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/f9b49925c1c84761a71f07c46ab03bfc
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spelling	oai:doaj.org-article:f9b49925c1c84761a71f07c46ab03bfc2021-11-25T18:14:38ZFiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams10.3390/ma142269061996-1944https://doaj.org/article/f9b49925c1c84761a71f07c46ab03bfc2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6906https://doaj.org/toc/1996-1944There are ongoing research efforts directed at addressing strength limitations of compressed earth blocks (CEB) that inhibit their deployment for structural applications, particularly in areas where masonry systems are regularly subjected to lateral loads from high winds. In this paper, the authors focus specifically on the extent to which polypropylene (PP) fibers can be used to enhance the flexural performance of CEB. Cementitious matrices used for CEB production exhibit low tensile and flexural strength (brittle) properties. This work investigates plain (unreinforced) and fiber-reinforced specimens (short flexural beams) with fiber mass content of 0.2, 0.4, 0.6, 0.8, and 1.0% and ordinary Portland cement (OPC) content of 8%. The influence of the inclusion of fiber was based on tests conducted using the Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (ASTM C1609). Material properties that were quantified included first-peak strength, peak strength, equivalent flexural strength, residual strength, and flexural toughness. There was an observed improvement in the performance of the soil-fiber matrixes based on these results of these tests. It was also observed that when the fiber content exceeded 0.6% and above, specimens exhibited a deflection- hardening behavior; an indication of improvement in ductility. An equivalent flexural strength predictive model is proposed.Peter DonkorEsther ObonyoChristopher FerraroMDPI AGarticlecompressed earth blockspolypropylene fibersequivalent flexural strengthresidual strengthflexural toughnessTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6906, p 6906 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	compressed earth blocks polypropylene fibers equivalent flexural strength residual strength flexural toughness Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	compressed earth blocks polypropylene fibers equivalent flexural strength residual strength flexural toughness Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Peter Donkor Esther Obonyo Christopher Ferraro Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
description	There are ongoing research efforts directed at addressing strength limitations of compressed earth blocks (CEB) that inhibit their deployment for structural applications, particularly in areas where masonry systems are regularly subjected to lateral loads from high winds. In this paper, the authors focus specifically on the extent to which polypropylene (PP) fibers can be used to enhance the flexural performance of CEB. Cementitious matrices used for CEB production exhibit low tensile and flexural strength (brittle) properties. This work investigates plain (unreinforced) and fiber-reinforced specimens (short flexural beams) with fiber mass content of 0.2, 0.4, 0.6, 0.8, and 1.0% and ordinary Portland cement (OPC) content of 8%. The influence of the inclusion of fiber was based on tests conducted using the Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete (ASTM C1609). Material properties that were quantified included first-peak strength, peak strength, equivalent flexural strength, residual strength, and flexural toughness. There was an observed improvement in the performance of the soil-fiber matrixes based on these results of these tests. It was also observed that when the fiber content exceeded 0.6% and above, specimens exhibited a deflection- hardening behavior; an indication of improvement in ductility. An equivalent flexural strength predictive model is proposed.
format	article
author	Peter Donkor Esther Obonyo Christopher Ferraro
author_facet	Peter Donkor Esther Obonyo Christopher Ferraro
author_sort	Peter Donkor
title	Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
title_short	Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
title_full	Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
title_fullStr	Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
title_full_unstemmed	Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams
title_sort	fiber reinforced compressed earth blocks: evaluating flexural strength characteristics using short flexural beams
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f9b49925c1c84761a71f07c46ab03bfc
work_keys_str_mv	AT peterdonkor fiberreinforcedcompressedearthblocksevaluatingflexuralstrengthcharacteristicsusingshortflexuralbeams AT estherobonyo fiberreinforcedcompressedearthblocksevaluatingflexuralstrengthcharacteristicsusingshortflexuralbeams AT christopherferraro fiberreinforcedcompressedearthblocksevaluatingflexuralstrengthcharacteristicsusingshortflexuralbeams
_version_	1718411477686157312

Fiber Reinforced Compressed Earth Blocks: Evaluating Flexural Strength Characteristics Using Short Flexural Beams

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