Influence of Mix Design Parameters on the Fresh and Compressive Strength of Steel Fiber-Reinforced Self-Compacting Geopolymer Concrete 24 12
DOI:
https://doi.org/10.26623/teknika.v21i2.15415Keywords:
self-compacting geopolymer concrete, fly ash, steel fiber, superplasticizer, water-to-binder ratio, ambient curingAbstract
Self-compacting geopolymer concrete (SCGC) is a sustainable alternative to ordinary Portland cement (OPC)-based concrete because it combines the environmental benefits of geopolymer binders with the superior workability of self-compacting concrete. This study investigated the effects of the water-to-binder (W/B) ratio, alkaline activator-to-fly ash (AAS/FA) ratio, and superplasticizer dosage on the fresh and compressive strength performance of fly ash-based SCGC reinforced with 1% straight steel fibers under ambient curing conditions. Two mixture formulations were evaluated. Fresh properties were assessed using slump flow, V-funnel, and L-box tests in accordance with EFNARC (2005), while compressive strength was determined at 7, 28, and 56 days. SCGC-B (W/B = 0.075, AAS/FA = 0.35, superplasticizer = 4.5%) exhibited the best performance, achieving a slump flow of 705 mm, a V-funnel flow time of 9 s, an L-box ratio of 0.89, and compressive strengths of 15.08, 26.40, and 33.52 MPa at 7, 28, and 56 days, respectively. The results demonstrate that optimizing mixture composition enables the production of structural-grade SCGC satisfying EFNARC requirements under ambient curing conditions. This study also provides an experimental basis for the development and optimization of sustainable geopolymer concrete using locally available Class F fly ash.
References
Basha, S. I., Rehman, A. U., Khalid, H. R., Aziz, Md. A., & Kim, J. (2023). 3D Printable Geopolymer Composites Reinforced With Carbon‐Based Nanomaterials – A Review. The Chemical Record, 23(10). https://doi.org/10.1002/tcr.202300054
Dhanalakshmi, A., Shahul Hameed, M. A., Kaliraj, P., Velci Shridevi, P., & Rajendrakani, K. (2023). Mechanical Behaviour of Geopolymer Concrete Using Steel Fibers. Advanced Materials Research, 1178, 159–168. https://doi.org/10.4028/p-iTP8HE
EFNARC. (2005). The European Guidelines for Self-Compacting Concrete. In The European Guidelines for Self-Compacting Concrete (Number May). The European Guidelines for Self-Compacting Concrete.
Ghafoor, M. T., & Fujiyama, C. (2022). Performance of Superplasticizers in Alkaline Environment of Self Compacting Geopolymer Mortar. Journal of Advanced Concrete Technology, 20(11), 676–690. https://doi.org/https://doi.org/10.3151/jact.20.676
Ghafoor, M. T., & Fujiyama, C. (2023). Mix Design Process for Sustainable Self-Compacting Geopolymer Concrete. Heliyon, 9(11), e22206. https://doi.org/https://doi.org/10.1016/j.heliyon.2023.e22206
Ghafoor, M. T., Fujiyama, C., & Maekawa, K. (2021). Mix Design Processing for Self-Compacting Geopolymer Mortar. Journal of Advanced Concrete Technology, 19(11), 1133–1147. https://doi.org/10.3151/jact.19.1133
Ghafoor, M. T., Khan, Q. S., Qazi, A. U., Sheikh, M. N., & Hadi, M. N. S. (2021). Influence of Alkaline Activators on the Mechanical Properties of Fly Ash Based Geopolymer Concrete Cured at Ambient Temperature. Construction and Building Materials, 273, 121752. https://doi.org/10.1016/j.conbuildmat.2020.121752
Hafez, H., Cheung, W. M., Nagaratnam, B., & Kurda, R. (2019). A Proposed Performance Based Approach for Life Cycle Assessment of Reinforced Blended Cement Concrete. 3, 50–61. https://doi.org/10.18552/2019/idscmt5135
Joshi, D. A., & Sawant, R. (2025). Advanced Exploration of Current State‐of‐the‐Art of Practices of Fiber‐Reinforced Self‐Compacting Geopolymer Concrete. Materialwissenschaft Und Werkstofftechnik, 56(8), 1070–1095. https://doi.org/https://doi.org/10.1002/mawe.70019
Kumar, S. G. K. M., Kinuthia, J., Oti, J., & Adeleke, B. O. (2025). Geopolymer Chemistry and Composition: A Comprehensive Review of Synthesis, Reaction Mechanisms, and Material Properties—Oriented With Sustainable Construction. Materials, 18(16), 3823. https://doi.org/10.3390/ma18163823
Moodi, F., Hanafi, M., & Shariatinia, Z. (2025). Toward High Sustainability Using Fully Recycled Geopolymer Concrete: Mechanical, Rheological, and Microstructural Properties. RSC Advances, 15(28), 22953–22971. https://doi.org/10.1039/d5ra02249e
Nath, P., & Sarker, P. K. (2013). Fracture Properties of Geopolymer Concrete Cured in Ambient Temperature. 1061–1066. https://doi.org/10.3850/978-981-07-5354-2_m-53-430
Onn, C. C., Mo, K. H., Radwan, M. K. H., Liew, W. H., Ng, C. G., & Yusoff, S. (2019). Strength, Carbon Footprint and Cost Considerations of Mortar Blends with High Volume Ground Granulated Blast Furnace Flag. Sustainability (Switzerland), 11(24), 7194. https://doi.org/10.3390/SU11247194
Pelisser, F., SILVA, B. V, MENGER, M. H., FRASSON, B. J., Keller, T., Torii, A. J., & Lopez, R. H. (2018). Structural Analysis of Composite Metakaolin-Based Geopolymer Concrete. Revista Ibracon De Estruturas E Materiais, 11(3), 535–543. https://doi.org/10.1590/s1983-41952018000300006
Rahimpour, H., & Esmaeili, J. (2025). Characterization, Mechanical Strength, Rheological Properties and Life Cycle Assessment of Fully Recycled Concrete Through Geopolymer Technology. Scientific Reports, 15(1). https://doi.org/10.1038/s41598-025-92307-y
Rehman, A. U., & Kim, J. (2021). 3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics. Materials, 14(14), 3800. https://doi.org/https://doi.org/10.3390/ma14143800
Samuel, R., Puppala, A. J., & Radović, M. (2020). Sustainability Benefits Assessment of Metakaolin-Based Geopolymer Treatment of High Plasticity Clay. Sustainability, 12(24), 10495. https://doi.org/10.3390/su122410495
Sbahieh, S., McKay, G., & Al‐Ghamdi, S. G. (2023). Comprehensive Analysis of Geopolymer Materials: Properties, Environmental Impacts, and Applications. Materials, 16(23), 7363. https://doi.org/10.3390/ma16237363
Wang, D., Ju, Y., Shen, H., & Xu, L. (2019). Mechanical properties of high performance concrete reinforced with basalt fiber and polypropylene fiber. Construction and Building Materials. https://www.sciencedirect.com/science/article/pii/S0950061818328733
Yun-Ming, L., Kamarudin, H., Abdullah, M. M. A. B., Binhussain, M., Musa, L., Ismail, K. N., Ghazali, C. M. R., & Cheng-Yong, H. (2012). Effect of Curing Regimes on Metakaolin Geopolymer Pastes Produced From Geopolymer Powder. Advanced Materials Research, 626, 931–936. https://doi.org/10.4028/www.scientific.net/amr.626.931
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