Estudo da utilização de resíduos da mineração de calcário na produção de blocos de concreto para construção civil

Abstract

This study was based on waste generated by limestone mining companies, discarded without any type of use. These materials end up creating disruptions and costs companies to be stored in their yards, having to be removed to controlled landfills. In this In this context, a survey of the waste materials and the selection of those that were part of the of test specimens. These are wood-burning ash, non-standard sand and hydraulic lime which a product of the company, which have been tested to verify the feasibility of creating a new destination to these materials, such as concrete blocks for civil construction. Companies producing limestone may benefit from this study, also facilitating its framework within the environmental norms. Were stages such as selection, characterization of materials, production of test specimens and tests, all respecting ABNT standards. The obtained resistances reached values ​​between 1,53 MPa and 3,13 MPa, without the addition of cement, sufficient for the production of the blocks compared to the NBR standards 6136 (2007), which has a minimum requirement of 2MPa and NBR 7170 (1983) which requires at least 1.5 MPa. Therefore, it was possible to prove the technical viability of a new use for limestone in Caçapava do Sul / RS.