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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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/17/3008 |
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| author | Rajab Abousnina Haifa Ibrahim Alsalmi Allan Manalo Rochstad Lim Allister Omar Alajarmeh Wahid Ferdous Khouloud Jlassi |
| author_facet | Rajab Abousnina Haifa Ibrahim Alsalmi Allan Manalo Rochstad Lim Allister Omar Alajarmeh Wahid Ferdous Khouloud Jlassi |
| author_sort | Rajab Abousnina |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T08:05:38Z |
| format | Article |
| id | doaj.art-256bff2f18b7440b8dda8bde13c27efb |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:05:38Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-256bff2f18b7440b8dda8bde13c27efb2023-11-22T11:06:41ZengMDPI AGPolymers2073-43602021-09-011317300810.3390/polym13173008Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated SandRajab Abousnina0Haifa Ibrahim Alsalmi1Allan Manalo2Rochstad Lim Allister3Omar Alajarmeh4Wahid Ferdous5Khouloud Jlassi6School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, AustraliaCentre for Future Materials (CFM), University of Southern Queensland, Toowoomba, QLD 4350, AustraliaCentre for Future Materials (CFM), University of Southern Queensland, Toowoomba, QLD 4350, AustraliaTuffChem Environmental Services Pte. Ltd., Singapore 508960, SingaporeCentre for Future Materials (CFM), University of Southern Queensland, Toowoomba, QLD 4350, AustraliaCentre for Future Materials (CFM), University of Southern Queensland, Toowoomba, QLD 4350, AustraliaCentre for Advanced Materials, Qatar University, Doha 2713, QatarSand 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.https://www.mdpi.com/2073-4360/13/17/3008short fibrescontaminated sandmechanical propertiesgeopolymer mortarfly ash |
| spellingShingle | Rajab Abousnina Haifa Ibrahim Alsalmi Allan Manalo Rochstad Lim Allister Omar Alajarmeh Wahid Ferdous Khouloud Jlassi Effect of Short Fibres in the Mechanical Properties of Geopolymer Mortar Containing Oil-Contaminated Sand Polymers short fibres contaminated sand mechanical properties geopolymer mortar fly ash |
| 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 | short fibres contaminated sand mechanical properties geopolymer mortar fly ash |
| url | https://www.mdpi.com/2073-4360/13/17/3008 |
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