Santosa , B. ., Ginting, A., Adi , P. . and Manasye , E. O. . (2023) “Effect of Partial Replacement of Cement with Coconut Shell Ash on Concrete Performance”, Jurnal Teknik Sipil, 19(2), pp. 278 –. doi: 10.28932/jts.v19i2.5286.