Evaluation of crushed stone grains obtained by crushing recycled concrete
The results of the laboratory studies to determine the surface areas of gravel derived from sandstone, granite and recycled concrete of various factions have been given. Analysis of the data has shown that for the concrete rubble from the secondary fraction of 5-20 mm surface development is 8-14%, 20-40 mm fraction 14-24%, fraction of 40-70 mm 20-31%.