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Articles | Tropical Environment, Biology, and Technology | Volume 4 - Issue 1 - 2026 | 1-10 | https://doi.org/10.53623/tebt.v4i1.870
© 2026 by the author(s), and is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License Creative Commons Attribution 4.0 International (CC BY 4.0) License

Sustainable Concrete Production through Partial Cement Replacement Using Fly Ash and Rice Husk Ash

Author(s): Meron Tesfaye 1 , Surya Dewi Puspitasari 2 ORCID https://orcid.org/0000-0002-1810-1622 , Oki Setyandito 3 ORCID https://orcid.org/0000-0002-0147-8757 , Ahmed Elamin 4 , Wanjiku Kamau 5
Author(s) information:
1 Department of Civil Engineering, Addis Ababa University, Ethiopia
2 Department of Civil and Environmental Engineering, The Norwegian University of Science and Technology, Høgskoleringen 1, 7034, Trondheim, Norway
3 Civil Engineering Department, Faculty of Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia
4 Faculty of Engineering, University of Khartoum, Sudan
5 School of Civil and Environmental Engineering, University of Nairobi, Kenya

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Tropical Environment, Biology, and Technology

Volume 4 - Issue 1 - 2026

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This study explores the utilization of fly ash and rice husk ash as supplementary cementitious materials to partially replace ordinary Portland cement (OPC) in concrete production. The increasing environmental impact of cement manufacturing, particularly its contribution to carbon dioxide emissions, has driven the search for alternative materials that promote sustainability without compromising performance. Fly ash and rice husk ash, both industrial and agricultural by-products, possess pozzolanic properties that enhance the mechanical and durability characteristics of concrete when properly incorporated. This paper reviews their chemical composition, particle morphology, and the effects of replacement levels on compressive strength, workability, and long-term durability. Additionally, the study discusses challenges such as variability in ash quality, optimal replacement percentages, and curing conditions that influence performance outcomes. By integrating these waste materials into concrete, significant environmental and economic benefits can be achieved, including reduced landfill disposal, conservation of natural resources, and lower greenhouse gas emissions. The findings highlight the potential of fly ash and rice husk ash as sustainable cement substitutes, supporting the development of eco-friendly construction materials aligned with green building standards and circular economy principles. This research contributes to advancing sustainable practices in the construction industry and provides insights for future studies focused on optimizing mix design, performance enhancement, and large-scale application of alternative cementitious materials.

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SUBMITTED: 27 October 2025
ACCEPTED: 19 January 2026
PUBLISHED: 29 January 2026
SUBMITTED to ACCEPTED: 84 days
DOI: https://doi.org/10.53623/tebt.v4i1.870

Cite this article
Tesfaye, M. ., Puspitasari, S. D. ., Setyandito, O. ., Elamin, A. ., & Kamau, W. . (2026). Sustainable Concrete Production through Partial Cement Replacement Using Fly Ash and Rice Husk Ash . Tropical Environment, Biology, and Technology, 4(1), 1–10. https://doi.org/10.53623/tebt.v4i1.870
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