Desenvolvimento e caracterização de uma geotinta com o aproveitamento do rejeito de mineração de calcário

Abstract

Mining is a very important activity for civil engineering. It is from it that important for civil construction, construction of bridges, roads, development of construction materials and several other applications are withdrawn. However, this activity has had a negative impact both on the exploration areas and on their possibilities. The environmental environment, it is possible to reduce the quality of the environment in which it was applied to the quality of the environment in which it was applied. From this problematic problem, a material from the face of calculus mining waste was studied as an alternative to the development of an ecological paint. For this, four geopaints were released: with the use of white glue, styrofoam glue, wheat glue and starch glue, and tests with a commercially available paint. Define a suitable preparation for bleeders and verify a suitable preparation for bleeders and verify with its application. commercial paint and wheat glue paint. Visual examinations of the geopaints and commercials were examined, followed by the rheological tests with the study of fabrication along the painting of the geopaints from the temperature to 45 oC of the glues and the commercial paint. They are designed for flow curves and commercial paint for built geoinks and for human blood and insulated insulators. For cytotoxicity evaluation, the MTT method (3-α4,5-dimethyl-thiazol-2-ylα-2,5- diphenyltetrazolium bromide) was used in the following 100 µg/mL, 100 ng/mL and 100 pg / ml. As a result, it is possible to highlight that the reuse for the production of geotins is 64,14% of limestone mining tailings with a granulometry of 0,075 mm, 25,64% from water and 10,26% from glue.Both in terms of application and visual aspects, all geopaints and commercial paint showed good results, with the exception of geopaint with the use of styrofoam glue, a factor that was more characteristic after 6 months of observation. In terms of viscosity, geoinks showed greater stability over the temperature variation when compared to commercial paints. All geoinks such as commercial ink showed characteristics of pseudoplastic fluids. Only geoink developed with mining waste, water and wheat glue did not change the apparent viscosity of human peripheral blood. This also did not change the cell viability by the MTT assay, as well as the commercial ink did not show cytotoxicity, being, therefore, the geoink developed with greater future possibility of using limestone mining tailings, with a view to the sustainable and rational use of this activity.