Per: gabriel pereira monteiro (universidade estadual do norte fluminense darcy ribeiro), Afonso Rangel Garcez Azevedo (universidade estadual do norte fluminense darcy ribeiro), markssuel teixeira marvila (universidade federal de viçosa), Sergio Neves Monteiro (instituto militar de engenharia)
Abstract:
The civil construction industry is one of the biggest raw material consumers on the planet. However, one of the advantages found in this industry is the possibility of incorporating different residues into its materials, reducing the environmental impacts produced by it, in addition to the possibility of developing new products. This research aims to evaluate the properties in the fresh state (consistency, density, incorporated air and water retention) of coating mortars, with a trace of 1:3:0.85 (cement: sand: water), with the Addition of açaí stone, an agro-industrial residue, as a partial substitute (10% by mass) of sand, in different processes: natural stone, calcined at 400ºC, treated with KOH and NaOH. The mortars containing the residue showed less consistency, with emphasis on the composition with NaOH with a reduction of 52%. Density also reduced in all mortars with the residue, presenting a lighter and more flexible material. The incorporated air content showed little variation in 0.3 and 0.2%. Finally, water retention showed an improvement in all compositions, especially those treated in KOH and NaOH, increasing this property by 11%. The addition of the seeds proved to be viable analyzing the properties in the fresh state of the material