Use of Coal Waste as Fine Aggregates in Concrete Paving BlocksApr 30, 2013 . ered the following steps: sampling of a coal mining waste; gravity . used to replace conventional sand as a fine aggregate for concrete paving.fine aggregate in concrete mining,Construction aggregate - WikipediaConstruction aggregate, or simply "aggregate", is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. . basic materials can be grouped into three main areas: Mining of mineral aggregate deposits, including sand,.
fine aggregate in concrete mining