Irawan, Isa, Elfidiah, Sri Martini, and Kiagus Ahmad Roni. “The Effect of Silica Fume Pozzolan Percentage As a Partial Cement Substitution on Concrete Compressive Strength”. Engineering And Technology Journal 10, no. 9 (September 22, 2025): 7183–7187. Accessed September 28, 2026. https://everant.org/index.php/etj/article/view/2179.