Nomrak, Charin, Saharat Sompracha, Santiphap Chapakdee, and Chaturong Chuldet. “The Synthesis of Silica from Biomass Ash for the Use as an Admixture for Mortar and Concrete”. Journal of Bansomdej Engineering and Industrial Technology 3, no. 2 (December 31, 2022): 47–62. accessed April 13, 2025. https://ph04.tci-thaijo.org/index.php/JEITB/article/view/4046.