| Issue |
BIO Web Conf.
Volume 144, 2024
1st International Graduate Conference on Smart Agriculture and Green Renewable Energy (SAGE-Grace 2024)
|
|
|---|---|---|
| Article Number | 06003 | |
| Number of page(s) | 6 | |
| Section | Sustainable Construction and Material Science | |
| DOI | https://doi.org/10.1051/bioconf/202414406003 | |
| Published online | 25 November 2024 | |
Strength characteristic and life cycle cost of sustainable bio-patch repair geopolymer mortar using rice husk ash as an alternative silica and alumina source
1 Department of Civil Engineering, Universitas Muhammadiyah Yogyakarta, Indonesia
2 Department of Civil Engineering, Vocational College, Universitas Gadjah Mada, Indonesia
* Corresponding author: pinta.astuti@ft.umy.ac.id
Rapid development in construction has increased cement use, raising CO₂ emissions. Geopolymers offer an eco-friendly alternative, reducing reliance on cement. This study examines rice husk ash (RHA), a pozzolanic material, as a binder. Three alkali activator variations (AA40%, AA45%, AA50%) were tested for mechanical properties, focusing on compressive strength. The mix design was optimized and cured at 70°C and room temperature. The AA40% variation showed the highest compressive strength of 8.14 MPa. RHA-based geopolymer mortar supports UN SDGs 9, 12, and 13, showing a significantly lower 30-year life cycle cost (IDR 4,125,000 vs. IDR 6,225,000 for Portland cement). It reduces agricultural waste, lowers carbon footprints, and offers long-term economic benefits, highlighting its potential as a sustainable building material.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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