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Comparative study on the preparation of belite cement from nano-silicas extracted from different agricultural wastes with calcium carbide residue

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journal contribution
posted on 05.05.2022, 02:16 by K Kunchariyakun, S Sinyoung, S Asavapisit, Kenneth MacKenzieKenneth MacKenzie
Belite cement was prepared using nano-silicas extracted from three different agricultural wastes–black rice husk ash (BRHA), bagasse ash (BA), and palm oil fuel ash (POFA)–which were reacted at 1200 − 1400 °C with CaC2 residue as calcium source. The product was compared with that from CaCO3. Nano-silica extracted from BRHA was of very fine particle size (surface area 312.4 m2/g and V/S ratio 0.35 × 106 cm) and being highly reactive, forms β-C2S at lower firing temperatures; however, at higher temperatures, less-desirable γ-polymorphs are formed. Nano-silica extracted from POFA contains Na2O, Al2O3, and K2O impurities, which stabilize the β and α-forms and delay the transformation to γ-phase. This is reflected in relatively high compressive strength at firing temperature above 1200 °C, compared to other mixtures. Thus, these results indicate that the best combination of these waste materials for the preparation of belite cement phases is POFA ash and CaC2 residue.

History

Preferred citation

Kunchariyakun, K., Sinyoung, S., Asavapisit, S. & MacKenzie, K. J. D. (2022). Comparative study on the preparation of belite cement from nano-silicas extracted from different agricultural wastes with calcium carbide residue. Journal of Sustainable Cement-Based Materials, 1-12. https://doi.org/10.1080/21650373.2021.2025164

Journal title

Journal of Sustainable Cement-Based Materials

Publication date

01/01/2022

Pagination

1-12

Publisher

Informa UK Limited

Publication status

Published

Online publication date

23/01/2022

ISSN

2165-0373

eISSN

2165-0381

Language

en