Phoo-ngernkham, Tanakorn, Prinya Chindaprasirt, Vanchai Sata, and Sakonwan Hanjitsuwan. “Influence of portland cement replacement in high calcium fly ash geopolymer paste”. Engineering and Applied Science Research 41, no. 1 (September 22, 2014): 19–27. accessed September 25, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/21758.