Uso do residuo de beneficiamento de rochas ornamentais na producao de argamassa de multiplo uso

The municipal district of Itapemirim-ES is the largest producer of ornamental stones in Brazil. The processing of these rocks for the manufacture of floor and produces a large amount of waste approximately 15,000 tons/month, which still are responsible for damage to the environment. Aiming at the use of this waste, this paper studies experimentally the production of mortars of multiple use, making the replacement of the use of hydrated lime, widely used in the manufacture of mortars in construction, by the waste of the processing of a marble industry Itapemirim -ES. The mortar waste was characterized and evaluated by comparing performance with mortar with the addition of hydrated lime. We used a slurry with lime as a reference, ie the mixture was made of 1:1:8 (cement: waste / lime sand), where the workability and the properties of the hardened condition were evaluated and compared with the mortars made with the waste of marble. The compressive strength results showed that the waste with lime mortars were 1.6 ± 0.5 MPa and 1.4 MPa respectively ± 0.6 after 28 days of curing, two were classified as P1 (ABNT 13279, 2005), can replace the waste lime, thereby reducing the cost of manufacture of the mortar. (author)