Reusing artificial stone waste in concrete as a filler of fine aggregates

In recent years, large amounts of slurry have been generated in artificial stone production plants with significant environmental impacts. Therefore, the main objective of this study was to investigate the possibility of replacing stone waste in concrete mixtures as filler of fine aggregates. For this purpose, stone powder was characterized by chemical and physical analysis. The results showed that this type of industrial by-product can be used in concrete due to containing Al 2 O 3 , SiO 2 , Cao and MgO as well as its similarity to cement properties. Moreover, 50% of the stone powder was less than 10 µm and classified in the range of cryptocrystalline and microcrystalline; therefore, it can be included as the filler of fine aggregates. On the other hand, it was used in concrete with different proportions of 0, 5, 7 and 10%. Then, slump flow test was conducted on fresh concrete. In addition, density and compressive strength were determined on 7 and 28 days concrete cubes. The results showed that the substitution of 5% of fine aggregates by stone waste caused higher compressive strength than control specimens. Furthermore, density test results of concretes containing stone waste were approximately equal to control cubes. Besides, the increase of stone waste content in concrete cubes decreased the slump slightly.