Journals Information
Civil Engineering and Architecture Vol. 11(6), pp. 3520 - 3526
DOI: 10.13189/cea.2023.110621
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Optimizing Fiber Reinforced Geopolymer Concrete: Investigating Alkaline-Activator Liquid to Fly Ash and Sodium Silicate to Sodium Hydroxide Ratio
Greg Blasiak 1, Yureana Wijayanti 2,*, Martin Anda 1
1 College of Science, Health, Engineering, and Education, Murdoch University, Australia
2 Department of Civil Engineering, Faculty of Engineering, Bina Nusantara University, Indonesia
ABSTRACT
The construction industry is placing significant emphasis on finding alternative binders to completely replace ordinary Portland cement (OPC) due to its environmental consequences. In this study, an experiment for the geopolymer concrete (GPC) made with fly ash and reinforced with glass fibers was conducted. GPC, in contrast to OPC which utilizes water for its binding effect, relies on an alkaline activator. This activator comprises solutions of sodium silicate (SS) and sodium hydroxide (SH) to achieve the binding process. The experiment investigated the specific combination of alkali activator liquid to fly ash ratio and, SS to SH ratio to produce the highest compressive strength result as well as the best workability performance. The aggregates used in the concrete are subject to grading and classification as per Australian standards and fly ash used in the production of concrete using Collie coal power stations, Western Australia, derived fly ash (Class F) activated by Sodium Silicate (SS) and Sodium Hydrate (SH) as the alkaline solution at 14 M. Glass fibers were added in a proportion of 2% by weight of concrete. The design mixes were applied by altering the SS to SH ratio of 1.25, 1.5, and 2.6, the alkaline activator liquid (AA) to fly ash (FA) ratio of 0.4, 0.5, 0.57, and 0.58. Also, the percentage of water to alkaline solution of 11%, 18%, and 20%. Concrete samples were cured in an oven at 60℃ for 24 h and at room temperature. The result indicated alkali activators liquid with SS to SH ratio of 1.5 and 2.6 achieved a maximum compressive strength after 28 days of 35 MPa and 40 MPa, respectively. Compressive strength decreases as the alkaline liquid to fly ash ratio is increasing. The workability for AA to FA of all ratios and for all percentages of water to AA shows good workability specified by Australian Standard.
KEYWORDS
Alkali-Activator Liquid, Fly Ash, Compressive Strength, Workability
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Greg Blasiak , Yureana Wijayanti , Martin Anda , "Optimizing Fiber Reinforced Geopolymer Concrete: Investigating Alkaline-Activator Liquid to Fly Ash and Sodium Silicate to Sodium Hydroxide Ratio," Civil Engineering and Architecture, Vol. 11, No. 6, pp. 3520 - 3526, 2023. DOI: 10.13189/cea.2023.110621.
(b). APA Format:
Greg Blasiak , Yureana Wijayanti , Martin Anda (2023). Optimizing Fiber Reinforced Geopolymer Concrete: Investigating Alkaline-Activator Liquid to Fly Ash and Sodium Silicate to Sodium Hydroxide Ratio. Civil Engineering and Architecture, 11(6), 3520 - 3526. DOI: 10.13189/cea.2023.110621.