Print version ISSN 0366-6913
On-line version ISSN 1678-4553
MENEZES, R. R. et al. Granite sawing waste recycling for mortar production. Cerâmica [online]. 2009, vol.55, n.335, pp.263-270. ISSN 0366-6913. http://dx.doi.org/10.1590/S0366-69132009000300005.
Around the world the amount of inorganic wastes has increased dramatically and is one of the most important issues for modern society. This work has as aim to analyze the suitability of granite sawing waste and construction wastes as alternative raw materials for the production of mortars. The wastes were physically and mineralogical characterized by the determination of particle size distribution, specific mass and specific area, chemical composition, X-ray diffraction, and differential thermal analysis. The pozzolanic activity index with hydrated lime of construction wastes was determined. Mortar compositions were formulated replacing the lime by waste. Test samples were produced, cured for 7, 14, 28 and 60 days, and characterized in terms of compression strength. The results show that the wastes are composed by high amounts of SiO2, Al2O3 e Fe2O3, and presented quartz, mica, feldspar, calcite and iron oxide as crystalline phases. It could also be concluded that it is possible to replace up to 50% of the lime by wastes, and that the pozzolanic wastes improve the compression strength of the mortars.
Keywords : recycling; construction wastes; granite sawing wastes; mortar.