Kalaw, M. E. L., Culaba, A. B., Nguyen, H. T., Nguyen, K., Hinode, H., Kurniawan, W., Gallardo, S. M., & Promentilla, M. A. B. (2015). Mechanical and Thermal Properties of Geopolymers from Mixtures of Coal Ash and Rice Hull Ash using Water Glass Solution as Activator. ASEAN Journal of Chemical Engineering, 15(2), 51-61. Retrieved from https://dev.journal.ugm.ac.id/v3/AJChE/article/view/8878