This work presents the results of a concerning study on the compaction behaviour of stones powder waste containing ceramic masses. The stones powder waste was generated by the industries from Santo Antônio de Pádua-RJ. For this purpose, five masses were prepared containing up to 20 wt.% waste, and their characteristics regarding X-ray diffraction, particle size analysis, morphology, and grain real specific mass were determined. The masses were submitted the cold compaction process at pressures up to 60 MPa, and their compaction response and compaction rate diagrams were generated. For each ceramic mass was determined a mathematics expression that describe with precision the relationship between the density and compaction pressure. The results revealed that the compaction is governed, at the applied pressure range, by two dominant mechanisms including particle rearrangement and plastic deformation. The rate of densification is high initially, but then decreases rapidly for pressures above about 2.45 - 3.22 MPa. In addition, it was found that the incorporated masses with stone powder waste presented better compaction efficiency for the given testing conditions.
Stone powder waste; compaction; recycling; ceramic masses
