@article{muniyasamy_raju_2026,  title={Structural characteristics of geopolymer concrete beams using alkali-modified blended ash: a comparative evaluation with conventional beams},  volume={31},  ISSN={1517-7076},  url={https://doi.org/10.1590/1517-7076-RMAT-2025-0990},  DOI={10.1590/1517-7076-RMAT-2025-0990},  journal={Matéria (Rio de Janeiro)},  publisher={Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2},  author={Muniyasamy, Sasi Rekha and Raju, Sumathy},  year={2026},  pages={20250990} }