The intent of this study is to explore the physical properties and long-term performance of concrete made with metakaolin (MK) as a binder. using microsilica (MS) and nanosilica (NS) as substitutes for a portion of the ordinary Portland cement (OPC) content. The dosage of MS was varied from 5% to 15% for OPC-MK-MS blends. and the dosage of NS was varied from 0. https://www.andrewiwanto.com/product-category/household-cleaning-and-hygiene-products/