Elementos construtivos e de proteção térmica à base de gesso e resíduos agroindustriais

• Autor(a) principal: Noronha, Livia Lima
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/5548
• topic: Gesso; Condutividade térmica; Resíduo agroindustrial; Construção sustentável; Plaster; Thermal conductivity; Agroindustrial residue; Sustainable construction; ENGENHARIAS::ENGENHARIA CIVIL

The sustainable construction concept has attracted attention worldwide, seeing that already is against scarcity of natural resources and energy, solid waste generation and emission of gases that damage the planet increasingly. This study invetigated the possibility the use of vegetable fibers pseudostem of banana and pulp packaging of cement for the development of composites that stand out for its reinforcing properties and thermal. The use of renewable materials can help reduce the strain on the environment. Packages of Portland cement are in Kraft paper and the vast majority are discarded into the environment. However, as they contain pulp fibers (cellulose) can be used as reinforcement in matrix. To obtain the pulp coming from cement bags, they were cut into pieces and passed in a paper shredder. Then the crushed material was immersed in water and passed on an industrial blender. In mixtures prepared with the fiber banana fiber percentages of 2% and 4% and the water / gypsum ranging from 0.4 to 0.7 were tested. The trace with 4% fiber and the water / plaster 0.5 resulted in a resistance of 2.80 MPa, while the mark with 2 % fiber and 0.4 of the water / gypsum produced a composite resistor 5 , 87 MPa. It is observed that by reducing the amount of fiber in the composite and the water / plaster, resistance increased due to voids also decreased . For the optimization of mixtures made with the pulp ranged up the water / plaster. The features were always molded to a ratio of 1 kg of gypsum / 0.08 kg pulp / 0.01 retardant additive. The variation of the water / gypsum was tested to get the best strength and workability. The best water / plaster ratio is 0.7. The results obtained by the method of hot plate protected, we found good results mainly the thermal properties of composites prepared with plaster and pulp packaging of cement. The test of thermal conductivity of the composite using the hot plate method showed that decreased compared to the plaster without reinforcement.