Saengsuree Pangdaeng, Vanchai Sata, and Prinya Chindaprasirt, “EFFECT OF SODIUM HYDROXIDE CONCENTRATION AND SODIUM SILICATE TO SODIUM HYDROXIDE RATIO ON PROPERTIES OF CALCINED KAOLIN-WHITE PORTLAND CEMENT GEOPOLYMER”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 14, no. 46, pp. 121–128, Feb. 2018.