Syaifudin H, Dhana RR. The Effectiveness of the Water Additional Ingredient Urea CO(NH2)2 to the Concrete Fc’ 20 MPA on Curing Process. civilla [Internet]. 2022 Sep. 15 [cited 2024 Apr. 28];7(2):171-82. Available from: https://jurnalteknik.unisla.ac.id/index.php/CVL/article/view/892