Wongkvanklom, Athika, Vanchai Sata, Jay G. Sanjayan, and Prinya Chindaprasirt. “Setting time, compressive strength and sulfuric acid resistance of a high calcium fly ash geopolymer containing borax”. Engineering and Applied Science Research 45, no. 2 (May 18, 2018): 89–94. accessed August 30, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/74232.