Thokchom S, Ghosh P, Ghosh S. Durability of fly ash geopolymer mortars in nitric acid–effect of alkali (Na2o) content. JCEM [Internet]. 2011Sep.20 [cited 2024Nov.23];17(3):393-9. Available from: https://jau.vgtu.lt/index.php/JCEM/article/view/5235