Sand aggregates used in making hollow blocks can be replaced with quarry dust. By using proper ratio of quarry dust with regular clay, fired bricks with improved strength can be manufactured.
When used for construction mortar, the refined crusher dust without micro fines below 150 micron contributes the maximum compressive strength when compared to sand and unrefined dust.
Rock dust is used as sand substitute for concrete roads. It can also be used as a mineral filler along with larger metal, on asphalt roads.