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Produ??o de concreto autoadens?vel com uso de f?ler calc?rio de res?duo de serragem de Pedra CaririMerc?s , Uiliana M?rcia da Silva 20 March 2017 (has links)
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Previous issue date: 2017-03-20 / The use of waste from Dimension Stone Industry as an inert material can be a good way to promote the sustainability of the construction sector. The Cariri stone is one of the dimension stones explored in state of Ceara, in Brazil. Thus, this work was developed with the main goal of studying a self-compacting concrete production (SCC) using Cariri stone sawdust waste (CSSW) in partial replacement with the natural fine aggregate. The SCC was designed using the method proposed by Melo (2005) considering two w/c ratios (0.57-0.70), and 10% of CSSW. The study was carried out in three stages: material characterization, mortar phase evaluation and SCC phase evaluation. In the fresh state, SCC was evaluated for fluidity, plastic viscosity, blocking capacity and segregation resistance, using V funnel, J-Ring, L-box and segregation column. In the hardened state, the SCC was evaluated for axial compressive strength, splitting tensile strength and water absorption, void index and specific density. The results showed that CSSW improve SCC cohesiveness and homogeneity, and it is feasible to apply up to 10% of CSSW in SCC production. / No sentido de promover a sustentabilidade do setor da constru??o civil, procura-se alternativas para diminuir o impacto ambiental gerado, atrav?s da descoberta de novos materiais alternativos, como os res?duos da ind?stria de beneficiamento de rochas ornamentais. Dentre os tipos de rochas ornamentais exploradas no Brasil, destaca-se um calc?rio laminado conhecido como ?Pedra Cariri?, que ? explorado no estado do Cear?. Assim, esse trabalho foi desenvolvido com o objetivo de estudar a produ??o de concreto autoadens?vel (CAA) utilizando res?duos de serragem de pedra Cariri (RSPC) em substitui??o parcial ao agregado mi?do natural. Utilizando a metodologia de Melo (2005) para produ??o de CAA, foram definidas as rela??es a/c (0,57-0,70). O estudo se deu em tr?s etapas: caracteriza??o dos materiais, fase argamassa e fase CAA. No estado fresco, o CAA foi avaliado quanto ? fluidez, viscosidade pl?stica, habilidade passante e resist?ncia ? segrega??o, por meio do ensaio de espalhamento, funil V, Anel J, Caixa L e coluna de segrega??o. No estado endurecido, o CAA foi avaliado quanto ? resist?ncia ? compress?o axial, ? resist?ncia ? tra??o por compress?o diametral e ? absor??o de ?gua, ?ndice de vazios e massa espec?fica. Os resultados indicaram a possibilidade da aplica??o de at? 10% de RSPC na produ??o de CAA.
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An?lise t?rmica e mec?nica de um comp?sito de matriz cer?mica com carga de EPS e raspa de pneu para constru??o de casas popularesLima, Fl?vio Anselmo Silva de 27 April 2012 (has links)
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Previous issue date: 2012-04-27 / Space Science was built using a composite made of plaster, EPS, shredded tires,
cement and water. Studies were conducted to thermal and mechanical resistance. Inside
the mold EPS plates were placed in order to obtain a higher thermal resistance on the
wall constructed, as well as to give it an end environmentally friendly in view of both
the tire and the EPS occupy a large space in landfills and year need to be degraded when
released into the environment. Compression tests were performed according to ABNT
blocks to seal, measurements of the temperature variation in the external and internal
walls using a laser thermometer and check the temperature of the indoor environment
using a thermocouple attached to a digital thermometer. The experiments demonstrated
the heat provided by the composite values from the temperature difference between the
internal and external surfaces on the walls, reaching levels of 12.4 ? C and room
temperature in the interior space of the Science of 33.3 ? C, remaining within the zone
thermal comfort for hot climate countries. It was also demonstrated the proper
mechanical strength of such a composite for sealing walls. The proposed use of the
composite can contribute to reducing the extreme housing shortage in our country,
producing popular homes at low cost and with little time to work / Foi constru?do o Espa?o Ci?ncia utilizando um comp?sito constitu?do de gesso,
EPS, pneu triturado, cimento e ?gua. Foram realizados estudos de resist?ncias t?rmica e
mec?nica. No interior do molde foram colocadas placas de EPS com o intuito de se
obter uma maior resist?ncia t?rmica nas paredes constru?das, como tamb?m dar-lhe um
fim ecologicamente correto, tendo em vista que tanto o pneu quanto o EPS ocupam
grande espa?o em aterros sanit?rios e necessitam de anos para serem degradados quando
lan?ados ao meio ambiente. Foram realizados ensaios de compress?o segundo as
normas da ABNT para blocos de veda??o, medi??es da varia??o de temperatura nas
paredes externas e internas utilizando um term?metro a laser e verifica??o da
temperatura do ambiente interno utilizando um termopar acoplado a um term?metro
digital. Os experimentos t?rmicos demonstraram os valores proporcionados pelo
comp?sito a partir da diferen?a de temperatura entre as superf?cies internas e externas
nas paredes, alcan?ando n?veis de 12,4?C e temperatura ambiente no interior do espa?o
ci?ncia, de 33,3 ?C ficando dentro da zona de conforto t?rmico para pa?ses de clima
quente. Demonstrou-se tamb?m apropriada resist?ncia mec?nica de tal comp?sito para
paredes de veda??o. A utiliza??o do comp?sito proposto pode contribuir para a
diminui??o do extremo d?ficit habitacional do nosso pa?s, produzindo resid?ncias
populares a baixo custo e com pequeno tempo de obra
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