M. T. Frediyansyah, S. Sukamta, R. A. . Sulistyowati, M. . Umam, and H. A. . Lie, “The Influence Of Adding Superplasticizer With Time Interval And Variation Of Water Reduction On The Early Strength And Workability Of Concrete”, Eduvest, vol. 4, no. 7, pp. 5577–5591, Jul. 2024.