Indrayani, Indrayani, Andi Herius, Arfan Hasan, and Ahmad Mirza. 2020. “The Effect of Addition on Pumice and Fiber on Compressive and Fluxural Strength Precast Lightweight Concrete: -”. Science and Technology Indonesia 5 (1):14-17. https://doi.org/10.26554/sti.2020.5.1.14-17.