Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness
Geopolymer concrete garners significant attention due to its potential to mitigate pressing global challenges, such as CO2 emissions and waste management for disposal. However, using more expensive commercial activators has posed a significant obstacle to practical implementation. Therefore, scienti...
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Elsevier B.V.
2025
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| author | Murali G. Kallamalayil Nassar A. Kathirvel P. Wong L.S. Karthikeyan K. Abid S.R. |
| author2 | 57203952839 |
| author_facet | 57203952839 Murali G. Kallamalayil Nassar A. Kathirvel P. Wong L.S. Karthikeyan K. Abid S.R. |
| author_sort | Murali G. |
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| content_provider | Universiti Tenaga Nasional |
| content_source | UNITEN Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Geopolymer concrete garners significant attention due to its potential to mitigate pressing global challenges, such as CO2 emissions and waste management for disposal. However, using more expensive commercial activators has posed a significant obstacle to practical implementation. Therefore, scientists want to develop methods to extract powdered activators from agricultural and industrial waste materials. To this end, the study has sought to create innovative activators derived from waste glass powder (WGP) and silica-rich rice husk ash (RHA) to create one-part geopolymer concrete (OPGC). Ground granulated blast-furnace slag is utilized as a precursor material for preparing binder, with varying ratios of WGP/RHA to sodium hydroxide (NaOH) from 0.50 to 1.75 at 0.25 intervals. Twenty-four distinct mixtures of OPGC were prepared using the materials mentioned above and evaluated for their compressive strength and fracture toughness. The primary objective of this research is to evaluate the mode I, III, and I/III fracture toughness of OPGC using edge-notched disc bend specimens. Additionally, a 1 % steel fiber dosage was introduced into the OPGC to reduce brittleness. The microstructural characteristics were examined through X-ray diffraction and scanning electron microscopy. Findings reveal that the fracture toughness of OPGC improves with the RHA to NaOH ratio up to 1.0, peaking at 1.09 MPa�m^0.5. Likewise, the fracture toughness increases with the WGP to NaOH ratio up to 0.75, reaching a peak value of 1.20 MPa�m^0.5. Beyond these respective ratios, a decrease in fracture toughness was observed. Nonetheless, incorporating fibers into OPGC consistently improved the fracture toughness across all mixtures. Mode I fracture toughness is greater than I/III and III, emphasizing the significance of Mode III compared to other fracture modes. ? 2024 Elsevier Ltd |
| format | Article |
| id | my.uniten.dspace-36163 |
| institution | Universiti Tenaga Nasional |
| publishDate | 2025 |
| publisher | Elsevier B.V. |
| record_format | dspace |
| spelling | my.uniten.dspace-361632025-03-03T15:41:29Z Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness Murali G. Kallamalayil Nassar A. Kathirvel P. Wong L.S. Karthikeyan K. Abid S.R. 57203952839 57972811000 57871610800 55504782500 55618041600 56548386400 Blast furnaces Brittle fracture Concrete mixtures Effluent treatment Fracture toughness Geopolymer concrete Industrial emissions Industrial waste disposal Slags X ray powder diffraction Activator Geopolymer Geopolymer concrete Global challenges Loading modes One parts Pressung Rice-husk ash Sustainable construction Waste glass powder Compressive strength Geopolymer concrete garners significant attention due to its potential to mitigate pressing global challenges, such as CO2 emissions and waste management for disposal. However, using more expensive commercial activators has posed a significant obstacle to practical implementation. Therefore, scientists want to develop methods to extract powdered activators from agricultural and industrial waste materials. To this end, the study has sought to create innovative activators derived from waste glass powder (WGP) and silica-rich rice husk ash (RHA) to create one-part geopolymer concrete (OPGC). Ground granulated blast-furnace slag is utilized as a precursor material for preparing binder, with varying ratios of WGP/RHA to sodium hydroxide (NaOH) from 0.50 to 1.75 at 0.25 intervals. Twenty-four distinct mixtures of OPGC were prepared using the materials mentioned above and evaluated for their compressive strength and fracture toughness. The primary objective of this research is to evaluate the mode I, III, and I/III fracture toughness of OPGC using edge-notched disc bend specimens. Additionally, a 1 % steel fiber dosage was introduced into the OPGC to reduce brittleness. The microstructural characteristics were examined through X-ray diffraction and scanning electron microscopy. Findings reveal that the fracture toughness of OPGC improves with the RHA to NaOH ratio up to 1.0, peaking at 1.09 MPa�m^0.5. Likewise, the fracture toughness increases with the WGP to NaOH ratio up to 0.75, reaching a peak value of 1.20 MPa�m^0.5. Beyond these respective ratios, a decrease in fracture toughness was observed. Nonetheless, incorporating fibers into OPGC consistently improved the fracture toughness across all mixtures. Mode I fracture toughness is greater than I/III and III, emphasizing the significance of Mode III compared to other fracture modes. ? 2024 Elsevier Ltd Final 2025-03-03T07:41:29Z 2025-03-03T07:41:29Z 2024 Article 10.1016/j.tafmec.2024.104745 2-s2.0-85208123296 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85208123296&doi=10.1016%2fj.tafmec.2024.104745&partnerID=40&md5=6971628c435bb3e5181f7d37b70bcd5f https://irepository.uniten.edu.my/handle/123456789/36163 134 104745 Elsevier B.V. Scopus |
| spellingShingle | Blast furnaces Brittle fracture Concrete mixtures Effluent treatment Fracture toughness Geopolymer concrete Industrial emissions Industrial waste disposal Slags X ray powder diffraction Activator Geopolymer Geopolymer concrete Global challenges Loading modes One parts Pressung Rice-husk ash Sustainable construction Waste glass powder Compressive strength Murali G. Kallamalayil Nassar A. Kathirvel P. Wong L.S. Karthikeyan K. Abid S.R. Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title | Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title_full | Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title_fullStr | Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title_full_unstemmed | Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title_short | Harnessing waste for sustainable construction: A novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| title_sort | harnessing waste for sustainable construction: a novel synthesizing activators from waste for one-part geopolymer concrete and evaluating its fracture toughness |
| topic | Blast furnaces Brittle fracture Concrete mixtures Effluent treatment Fracture toughness Geopolymer concrete Industrial emissions Industrial waste disposal Slags X ray powder diffraction Activator Geopolymer Geopolymer concrete Global challenges Loading modes One parts Pressung Rice-husk ash Sustainable construction Waste glass powder Compressive strength |
| url_provider | http://dspace.uniten.edu.my/ |