Utomo, Sudrajat, and Agung Sumarno. “he ffect of dditional rystalline aterials on oncrete on ulfic cid”. IJIEEB International Journal of Integrated Education, Engineering and Business eISSN 2615-1596 pISSN 2615-2312 4, no. 1 (March 31, 2021): 21-31. ccessed April 24, 2024. https://jurnal.narotama.ac.id/index.php/ijieeb/article/view/1349.