Utilização dos produtos da combustão do carvão mineral como aditivos na produção de argamassa para revestimento

Abstract

The use of waste as alternative materials has been shown to be a satisfactory solution according to several studies carried out. The set of light, heavy ashes and slag are called products of combustion of mineral coal (PCC’s). These residues cause environmental impact, but have great potential for use in the civil construction sector in the production of mortars and concrete.They have a high silica content (SiO2) and can be used as pozzolans. This research aimed to verify the feasibility of using theproducts of combustion of mineral coal in mortars for laying and coating. The raw materials were characterized in terms of physical, chemical aspects and for the CCP’s their pozzolanicity was also evaluated. Reference mortars were made with the addition of CCP’s in the contents of 10, 20, 30, 40 and 50% as a partial substitute for cement. After curing times of 7 and 28 days, flexural strength and compressive strength tests were performed. In addition, the mortars were subjected to X-ray fluorescence analysis, Scanning Electron Microscopy, water absorption, determination of voids index and apparent specific mass. The results obtained were compatible when compared with the data in the literature, demonstrating that the application of the products of the combustion of mineral coal in the construction industry is viable.