Journals J, Yabefa BE, Koroye SZ, Ufuoma GO. Effect of Extra Water on the Compressive Strength of Periwinkle Shell Ash Based Geopolymer Mortar. JBAS [Internet]. 2023 Nov. 6 [cited 2025 Apr. 3];3(1). Available from: http://jbasjournals.com/index.php/rsujbas/article/view/54