Development of sustainable high performance geopolymer concrete and mortar using agricultural biomass - A strength performance and sustainability analysis
Development of sustainable high performance geopolymer concrete and mortar using agricultural biomass - A strength performance and sustainability analysis
Geopolymer concrete is a sustainable substitute for traditional Portland cement concrete. In addition, rising carbon taxes on carbon emissions and energy-intensive materials like cement and lime, impacts the cost of industrial by-products due to their pozzolanic nature. This research evaluates the compressive strength and flexural strength of geopolymer concrete, and the compressive strength of geopolymer mortar. Geopolymer mortar data were used for the strength assessment employing an analytical approach, and geopolymer concrete data were utilized for the strength and sustainability performances. Using artificial neural networks (ANNs), multi-linear regression (MPR) analysis, and swarm-assisted linear regression, compressive strength models were created based on experimental datasets of geopolymer mortar mixes with variable precursors, alkali-activator percentages, Si/Al, and Na/Al ratios. The strength and sustainability performances of geopolymer concrete blends with various precursors were assessed by considering cost-efficiency, energy efficiency, and eco-efficiency. The work’s originality comes from enhancing sustainable high-performance concrete without overestimating or underestimating precursors. Extensive experimental work was done in the current study to determine the best mix of geopolymer concrete by varying silica fume, ground granulated blast furnace slag (GGBS), and rice husk ash (RHA). A scanning electron microscopic study was conducted to understand the geopolymer matrix’s microstructure further. A comprehensive discussion section is presented to explain the potential role of RHA. The replacement of conventional concrete in all its current uses may be made possible by this sustainable high-performance concrete utilizing RHA.
energy-efficiency, geopolymer concrete, soft computing, sustainable material, waste-to-energy
Nagaraju Thotakura, Vamsi
81151587-9164-4544-ba0d-de469c401b63
Bahrami, Alireza
3641497e-63d8-40d4-8040-4726bb07207e
Azab, Marc
c12dd426-0b86-49f5-acf1-7343669d0b2e
Naskar, Susmita
5f787953-b062-4774-a28b-473bd19254b1
2023
Nagaraju Thotakura, Vamsi
81151587-9164-4544-ba0d-de469c401b63
Bahrami, Alireza
3641497e-63d8-40d4-8040-4726bb07207e
Azab, Marc
c12dd426-0b86-49f5-acf1-7343669d0b2e
Naskar, Susmita
5f787953-b062-4774-a28b-473bd19254b1
Nagaraju Thotakura, Vamsi, Bahrami, Alireza, Azab, Marc and Naskar, Susmita
(2023)
Development of sustainable high performance geopolymer concrete and mortar using agricultural biomass - A strength performance and sustainability analysis.
Frontiers in Materials, 10, [1128095].
(doi:10.3389/fmats.2023.1128095).
Abstract
Geopolymer concrete is a sustainable substitute for traditional Portland cement concrete. In addition, rising carbon taxes on carbon emissions and energy-intensive materials like cement and lime, impacts the cost of industrial by-products due to their pozzolanic nature. This research evaluates the compressive strength and flexural strength of geopolymer concrete, and the compressive strength of geopolymer mortar. Geopolymer mortar data were used for the strength assessment employing an analytical approach, and geopolymer concrete data were utilized for the strength and sustainability performances. Using artificial neural networks (ANNs), multi-linear regression (MPR) analysis, and swarm-assisted linear regression, compressive strength models were created based on experimental datasets of geopolymer mortar mixes with variable precursors, alkali-activator percentages, Si/Al, and Na/Al ratios. The strength and sustainability performances of geopolymer concrete blends with various precursors were assessed by considering cost-efficiency, energy efficiency, and eco-efficiency. The work’s originality comes from enhancing sustainable high-performance concrete without overestimating or underestimating precursors. Extensive experimental work was done in the current study to determine the best mix of geopolymer concrete by varying silica fume, ground granulated blast furnace slag (GGBS), and rice husk ash (RHA). A scanning electron microscopic study was conducted to understand the geopolymer matrix’s microstructure further. A comprehensive discussion section is presented to explain the potential role of RHA. The replacement of conventional concrete in all its current uses may be made possible by this sustainable high-performance concrete utilizing RHA.
Other
1128095_Manuscript
- Accepted Manuscript
More information
Accepted/In Press date: 2 January 2023
e-pub ahead of print date: 7 March 2023
Published date: 2023
Additional Information:
Publisher Copyright:
Copyright © 2023 Nagaraju, Bahrami, Azab and Naskar.
Keywords:
energy-efficiency, geopolymer concrete, soft computing, sustainable material, waste-to-energy
Identifiers
Local EPrints ID: 474559
URI: http://eprints.soton.ac.uk/id/eprint/474559
PURE UUID: 6d83c193-bf4a-46b2-9567-d28e7b12682b
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Date deposited: 24 Feb 2023 17:45
Last modified: 17 Mar 2024 04:07
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Contributors
Author:
Vamsi Nagaraju Thotakura
Author:
Alireza Bahrami
Author:
Marc Azab
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