Uso de escória de ferro-níquel na fabricação de pavers

Abstract

Mining residues called Ferronickel slag are generated in large proportions at the mining companies in the nickel production process. Due to the amount of waste stockpiled and the lack of a final destination makes the residue an environmental liability and thus of concern to the mining companies. Aiming to investigate the viability of its use and reducing the environmental impact it is proposed to replace it as a partial or total aggregate in pavers (interlocking pavement) intended for the passage of people. Thus, the objective of the research is to evaluate the technical feasibility of this application using 4 types of concrete being one of them reference, that is, usual concrete from the block factory and the other three with contents 5%, 10% and 15% of ferronickel slag replacing the fine agregate. Then the physical and mechanical properties of the same and their respective technical feasibility of insertion of the residue in the production of pavers will be evaluated. It is expected that due to its rocky particle size and based on other applications of the same residue, it can maintain or improve the properties required by paver. It was verified after the experimental stage that there is feasibility of use in interlocking pavement pieces since the 10% replacement presented all the characteristics regarding size, visual inspection, absorption and compressive strength according to NBR 9781.