PENGARUH PENAMBAHAN SERABUT (FIBER) KELAPA SAWIT TERHADAP POROSITAS BETON. def [Internet]. 2022 Jun. 30 [cited 2025 Sep. 21];7(1):92-101. Available from: http://journal.univpgri-palembang.ac.id/index.php/deformasi/article/view/7766