Widjajakusuma J, Bali I, Ng GP, Wibowo KA. An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete. Adv. technol. innov. [Internet]. 2022 Jul. 27 [cited 2024 Apr. 23];7(4):295-302. Available from: https://ojs.imeti.org/index.php/AITI/article/view/10525