Safitri, E., Wibowo, W., & Fadhil, B. D. (2024). Compressive Strength Study on Reactive Powder Concrete with 30% Quartz Sand and Variations in Fly Ash Composition as Partial Substitution of Cement. Sustainable Civil Building Management and EngineeringĀ Journal, 1(3), 9. https://doi.org/10.47134/scbmej.v1i3.3009