Reutilização de resíduos de rochas ornamentais em argamassas de revestimento

Abstract

The reuse of ornamental stone residues, namely marble and granite, in coating mortars was the subject of study in the present work. For this purpose, marble and granite mud samples were collected at PROMAR, a company located on Avenida do Trabalho. The samples were then a) dried and ground and used in the partial and total replacement of the sand used in the mortars, b) in the molding of the specimens, drying and determination of the technological properties. In these tests, we worked with conventional mortar samples and samples where the amount of waste used was 25%, 50%, 75% and 100% of the amount of sand used in the conventional sample. The technological properties of the prepared specimens were determined in specimens with different ages, namely 3 days, 7 days, 14 days and 28 days of curing. The samples with 25% of residues showed the best values ​​of flexural strength, compressive strength, water absorption, apparent porosity and specific weight, in comparison with the other studied compositions.