Análise da utilização de fibras da casca de coco em tijolos de solo-cimento

Abstract

The growing population in the world has resulted in an increase in the volume of solid waste production, including coconut residue. The reuse of waste in Civil Construction is configured as a viable and conscious option for reducing the inadequate distribution of natural materials in the ecosystem. An example of reuse, is the incorporation of these residues for fabrication of ecological bricks for use in masonry without a structural function. The soil-cement brick or ecological brick is a hardened product resulting from the mixture of water, soil, and cement in different proportions that guarantee its efficiency. This work analyzed the behavior of soil cement bricks incorporated with dry coconut fiber intended to match the specifications of NBR 8491 (ABNT, 2012). In this perspective, four traits with different fiber contents were made, which were 0%, 2%, 5% and 7%. The bricks are hollow and have dimensions of 240 x 120 x 70 mm. The tests carried out in this analysis were the water absorption test, compressive strength test, and dimensional analysis, with a cure time of 7 days. Other tests to characterize the soil used were done, granulometric, consistency limits, and determination of organic impurities. The dimensional analysis tests showed satisfactory results for all batches of bricks. The water absorption tests showed that the batch bricks with a 7% fiber content exceed the value established in the standard, and the compressive strength tests showed that none batch bricks presented a satisfactory result by what settled in the norm. I In future work, it is important that new studies be realized with shorter or crushed fibers, as well as limiting the residue content to 4%, for more assertive results.