S. Bahri, and H. B. Mahmud. “Rice Husk Ash – An Alternative Material to Silica Fume For Production Of 100 MPa Mortar”. Electronic Journal of Structural Engineering 13, no. 2 (June 1, 2013): 31–35. Accessed May 19, 2024. https://ejsei.com/EJSE/article/view/170.