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Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand

Sand contaminated with crude oil is becoming a major environmental issue around the world, while at the same time, fly ash generated by coal-fired power stations is having a detrimental effect on the environment. Previous studies showed that combining these two waste materials can result in an envir...

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Autores principales: Abousnina, Rajab, Alsalmi, Haifa Ibrahim, Manalo, Allan, Allister, Rochstad Lim, Alajarmeh, Omar, Ferdous, Wahid, Jlassi, Khouloud
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8434154/
https://www.ncbi.nlm.nih.gov/pubmed/34503048
http://dx.doi.org/10.3390/polym13173008
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author Abousnina, Rajab
Alsalmi, Haifa Ibrahim
Manalo, Allan
Allister, Rochstad Lim
Alajarmeh, Omar
Ferdous, Wahid
Jlassi, Khouloud
author_facet Abousnina, Rajab
Alsalmi, Haifa Ibrahim
Manalo, Allan
Allister, Rochstad Lim
Alajarmeh, Omar
Ferdous, Wahid
Jlassi, Khouloud
author_sort Abousnina, Rajab
collection PubMed
description Sand contaminated with crude oil is becoming a major environmental issue around the world, while at the same time, fly ash generated by coal-fired power stations is having a detrimental effect on the environment. Previous studies showed that combining these two waste materials can result in an environmentally sustainable geopolymer concrete. Incorporating sand contaminated with crude oil up to a certain level (4% by weight) can improve the mechanical properties of the produced geopolymer concrete but beyond this level can have a detrimental effect on its compressive strength. To overcome this challenge, this study introduces short fibres to enhance the mechanical properties of geopolymer mortar containing fine sand contaminated with 6% by weight of light crude oil. Four types of short fibres, consisting of twisted polypropylene (PP) fibres, straight PP fibres, short glass fibres and steel fibres in different dosages (0.1, 0.2, 0.3, 0.4 and 0.5% by volume of geopolymer mortar) are considered. The optimum strength was obtained when straight PP fibres were used wherein increases of up to 39% and 74% of the compressive and tensile strength, respectively, of the geopolymer mortar were achieved. Moreover, a fibre dosage of 0.5% provided the highest enhancement in the mechanical properties of the geopolymer mortar with 6% crude oil contamination. This result indicates that the reduction in strength of geopolymer due to the addition of sand with 6% crude oil contamination can be regained by using short fibres, making this new material from wastes suitable for building and construction applications.
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spelling pubmed-84341542021-09-12 Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand Abousnina, Rajab Alsalmi, Haifa Ibrahim Manalo, Allan Allister, Rochstad Lim Alajarmeh, Omar Ferdous, Wahid Jlassi, Khouloud Polymers (Basel) Article Sand contaminated with crude oil is becoming a major environmental issue around the world, while at the same time, fly ash generated by coal-fired power stations is having a detrimental effect on the environment. Previous studies showed that combining these two waste materials can result in an environmentally sustainable geopolymer concrete. Incorporating sand contaminated with crude oil up to a certain level (4% by weight) can improve the mechanical properties of the produced geopolymer concrete but beyond this level can have a detrimental effect on its compressive strength. To overcome this challenge, this study introduces short fibres to enhance the mechanical properties of geopolymer mortar containing fine sand contaminated with 6% by weight of light crude oil. Four types of short fibres, consisting of twisted polypropylene (PP) fibres, straight PP fibres, short glass fibres and steel fibres in different dosages (0.1, 0.2, 0.3, 0.4 and 0.5% by volume of geopolymer mortar) are considered. The optimum strength was obtained when straight PP fibres were used wherein increases of up to 39% and 74% of the compressive and tensile strength, respectively, of the geopolymer mortar were achieved. Moreover, a fibre dosage of 0.5% provided the highest enhancement in the mechanical properties of the geopolymer mortar with 6% crude oil contamination. This result indicates that the reduction in strength of geopolymer due to the addition of sand with 6% crude oil contamination can be regained by using short fibres, making this new material from wastes suitable for building and construction applications. MDPI 2021-09-05 /pmc/articles/PMC8434154/ /pubmed/34503048 http://dx.doi.org/10.3390/polym13173008 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abousnina, Rajab
Alsalmi, Haifa Ibrahim
Manalo, Allan
Allister, Rochstad Lim
Alajarmeh, Omar
Ferdous, Wahid
Jlassi, Khouloud
Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title_full Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title_fullStr Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title_full_unstemmed Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title_short Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand
title_sort effect of short fibres in the mechanical properties of geopolymer mortar containing oil-contaminated sand
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8434154/
https://www.ncbi.nlm.nih.gov/pubmed/34503048
http://dx.doi.org/10.3390/polym13173008
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