Yeunyongkul, Pracha, Manoch Prakunanan, Kritsada Sakjaroenchaikul, Surapin Promdan, Supachard Krudtong, Ronnachart Munsin, Parkpoom Jarupoom, Sittiboon Siripornakarachai, and Tipapon Khamdaeng. 2021. “Investigation of Properties of Powder Coating Sludge-Indian Kaolin Based Geopolymer”. RMUTL Engineering Journal 6 (2):11-18. https://doi.org/10.14456/rmutlengj.2021.7.