The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete
The usage of geopolymer-based materials (GPBMs) in concrete structures has been broadly promoted by the current construction sector. GPBMs have an outstanding influence on enhancing concrete mechanical properties. Geopolymers (GPs) also have a potential impact on reducing the carbon dioxide emission...
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MDPI AG
2025-03-01
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| Series: | Construction Materials |
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| author | Sarah Al-Qutaifi Aliaa K. Hanan Ahmed Jabbar Hamza |
| author_facet | Sarah Al-Qutaifi Aliaa K. Hanan Ahmed Jabbar Hamza |
| author_sort | Sarah Al-Qutaifi |
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| description | The usage of geopolymer-based materials (GPBMs) in concrete structures has been broadly promoted by the current construction sector. GPBMs have an outstanding influence on enhancing concrete mechanical properties. Geopolymers (GPs) also have a potential impact on reducing the carbon dioxide emissions emitted by the current cement production procedure. Therefore, this paper aims to evaluate the impact of some variables that affect green and mechanical properties of fly ash-based geopolymer concretes (FA–GPCs), i.e., different silica fume (SF) contents, alkaline activator solution (AAS) percentages, sodium silicate-to-sodium hydroxide (SS/SH) ratios, sodium hydroxide (NaOH) molarity, and additional water. A slump test was used to evaluate the concrete workability to assess the green properties of the designed fly ash-geopolymer concrete mixes (FA–GPCMs). The 14- and 28-day compressive strengths were used to evaluate the concrete’s mechanical properties. Results indicate that the workability of prepared FA–GPCMs reduced with improving SF content (5% to 30%), SS/SH ratio (1% to 3%), and NaOH molarity (10 M to 16 M), while reducing alkaline activator percentages to 35% resulted in a decrease in the FA–GPCMs’ workability. Also, increasing SF replacement percentages from 5% to 15% in FA–GPCMs resulted in significant 14- and 28-day FA–GP compressive strength enhancements compared to FA–GPCM produced with 0% SF, while SF contents of 20%, 25%, and 30% led to a decline in the 14- and 28-day FA–GPC compressive strength compared to that of G1–SF15%. |
| format | Article |
| id | doaj-art-0705b5f3f26f4677a7ddee016683e8a8 |
| institution | OA Journals |
| issn | 2673-7108 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Construction Materials |
| spelling | doaj-art-0705b5f3f26f4677a7ddee016683e8a82025-08-20T02:11:04ZengMDPI AGConstruction Materials2673-71082025-03-01511610.3390/constrmater5010016The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer ConcreteSarah Al-Qutaifi0Aliaa K. Hanan1Ahmed Jabbar Hamza2Department of Surveying and Geomatics Engineering, College of Engineering, University of Thi-Qar, Nasiriyah 64001, IraqDepartment of Reconstruction & Projects, University of Thi-Qar, Nasiriyah 64001, IraqDepartment of Reconstruction & Projects, University of Thi-Qar, Nasiriyah 64001, IraqThe usage of geopolymer-based materials (GPBMs) in concrete structures has been broadly promoted by the current construction sector. GPBMs have an outstanding influence on enhancing concrete mechanical properties. Geopolymers (GPs) also have a potential impact on reducing the carbon dioxide emissions emitted by the current cement production procedure. Therefore, this paper aims to evaluate the impact of some variables that affect green and mechanical properties of fly ash-based geopolymer concretes (FA–GPCs), i.e., different silica fume (SF) contents, alkaline activator solution (AAS) percentages, sodium silicate-to-sodium hydroxide (SS/SH) ratios, sodium hydroxide (NaOH) molarity, and additional water. A slump test was used to evaluate the concrete workability to assess the green properties of the designed fly ash-geopolymer concrete mixes (FA–GPCMs). The 14- and 28-day compressive strengths were used to evaluate the concrete’s mechanical properties. Results indicate that the workability of prepared FA–GPCMs reduced with improving SF content (5% to 30%), SS/SH ratio (1% to 3%), and NaOH molarity (10 M to 16 M), while reducing alkaline activator percentages to 35% resulted in a decrease in the FA–GPCMs’ workability. Also, increasing SF replacement percentages from 5% to 15% in FA–GPCMs resulted in significant 14- and 28-day FA–GP compressive strength enhancements compared to FA–GPCM produced with 0% SF, while SF contents of 20%, 25%, and 30% led to a decline in the 14- and 28-day FA–GPC compressive strength compared to that of G1–SF15%.https://www.mdpi.com/2673-7108/5/1/16geopolymeralkaline activatorssilica fumefly ashcompressive strengthworkability |
| spellingShingle | Sarah Al-Qutaifi Aliaa K. Hanan Ahmed Jabbar Hamza The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete Construction Materials geopolymer alkaline activators silica fume fly ash compressive strength workability |
| title | The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete |
| title_full | The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete |
| title_fullStr | The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete |
| title_full_unstemmed | The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete |
| title_short | The Influence of Molarity Activity on the Green and Mechanical Properties of Geopolymer Concrete |
| title_sort | influence of molarity activity on the green and mechanical properties of geopolymer concrete |
| topic | geopolymer alkaline activators silica fume fly ash compressive strength workability |
| url | https://www.mdpi.com/2673-7108/5/1/16 |
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