Nanosilica is silica with a nanoscale size ranging from 1 to 100 nm, which serves to enhance the compressive strength of concrete. Nanosilica can be synthesized from kaolin. The materials used in this study include kaolin and a magnetic stirrer as a mixing tool. This research employs variations in drying times of 6 hours, 12 hours, and 24 hours. Microstructural testing methods, including X-Ray …