1. ASTM C 109/C 109M. Standard Test Method for Compressive Strength of Hydraulic Cement Mortars. (Annual Books of ASTM Standards, USA: Association of Standard Testing Materials, 2007).
2. A. M. Bakri, H. Kamarudin, M. Bnhussain, A. R. Rafiza, Y. Zarina, Effect of Na2SiO3/NaOH Ratios and NaOH Molarities on Compressive Strength of Fly-Ash-Based Geopolymer (ACI Materials Journal, 2012).
3. J. Davidovits, Geopolymer Chemistry & Application (Fourth Edition, France: Institut Geopolymere, 2015).
4. Failure mechanism of normal and high-strength concrete with rice-husk ash
5. Surface properties of silicas produced by thermal treatment of rice-husk ash