Randa , Yosua Kevin Jordan, Frans Phengkarsa, and Desi Sandy. 2024. “Pengaruh Serbuk Besi Dan Natrium Silika Serta Natrium Hidroksida Terhadap Beton”. Paulus Civil Engineering Journal 5 (1): 151-60. https://ojs.ukipaulus.ac.id/index.php/pcej/article/view/80.