About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
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| Presentation Title |
Investigation of the potential of alkaline activation in biochars obtained from waste |
| Author(s) |
Cássia Mirelly Milward De Souza, Jane Santos, Wellington Fernandes, Sarah Souza, Claudia Villa, Gabriele Mesquita, Fayner Aguiar, Flavio Ferreira, Leonardo Pedroti |
| On-Site Speaker (Planned) |
Leonardo Pedroti |
| Abstract Scope |
Alkali-activated materials combine a solid precursor, typically rich in silica and alumina, with a highly alkaline activating solution. These systems are extensively studied for construction use. This study assessed biochar — a carbon - rich material from pyrolysis of organic waste—as a precursor in alkali-activated systems. Six biochar sources were characterized by chemical composition and pozzolanic activity. Specimens were molded using biochar with activating solution and biochar with water to evaluate reactivity. X-ray diffraction (XRD) analyses were performed at 1 and 3 days to monitor the reaction evolution. Porosity and mechanical strength were also measured. Results showed low silica and alumina content and no pozzolanic activity in all samples. High porosity was observed across biochars, negatively impacting mechanical strength. Specimens with sugarcane biochar exhibited the highest strength and greatest potential for construction applications. This work contributes to understanding biochars as precursors in sustainable material development. |
| Proceedings Inclusion? |
Planned: |