“Study Addition of Bamboo Leaf Ash As a Substitute for Cement and Coconut Fiber As an Additive to the Compressive Strength of Concrete: Addition of Bamboo Leaf Ash As a Substitute for Cement and Coconut Fiber As an Additive to the Compressive Strength of Concrete”. Teras 11, no. 3 (September 30, 2021). Accessed May 26, 2026. https://ojs.unsiq.ac.id/index.php/teras/article/view/3162.