Please use this identifier to cite or link to this item: http://10.7.2.42:8080/jspui/handle/2011/9650
Title: Efeitos do tipo, tamanho e teor de agregado graudo na resistencia e energia de fratura do concreto
Other Titles: Effects of type, size and content of aggregate on concrete strenght and fracture energy
Authors: FERREIRA, Itamar
http://lattes.cnpq.br/9135346053526486
DUCATTI, Vitor Antonio
http://lattes.cnpq.br/4679656185466685
Keywords: Concreto
Mecânica da fratura
Concreto de alta resistência
Agregados (Materiais de construção)
Issue Date: 28-Sep-2004
Publisher: Universidade Estadual de Campinas
Citation: POMPEU NETO, Bernardo Borges. Efeitos do tipo, tamanho e teor de agregado graúdo na resistência e energia de fratura do concreto. 2004. 234 f. Tese (Doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, 2004. Programa de Pós-Graduação em Engenharia Mecânica. Disponível em: <http://repositorio.ufpa.br/jspui/handle/2011/9650>. Acesso em:.
Abstract: This thesis presents the results of the experimental study carried out for considering the effects of the type, size and amount of coarse aggregate on the behavior of normal and high strength concretes, and on relationship among the fracture energy and typical mechanical strength of concrete. The experimental concrete mixtures were made with basalt and granite coarse aggregates having maximum size particle 9.5 mm e 19 mm and volumetrically fraction in the mixture ranging from 0.65 to 0.75. The water to cementation materiais ratio ranged from 0.35 to 0.50. The high strength concrete mixtures contained a fixed amount of 10 percent of silica fume in relation to the weight Portland cement used and a proper addition of superplasticizing agent. Sixteen (16) concrete batching, and one hundred and ninety two tests were carried out to measure the mechanical resistance of concrete (compressive strength, flexure strength, spittling tensile strength, modulus of elasticity) and fracture energy. The fracture properties measured in agreement of the RILEM test methods. The concrete compressive strength ranged from 40 to 60 MPa, and from 70 to 110 MPa, for moderate and high strength concretes, respectively, depending on the type of coarse aggregate utilized. The results showed that the concrete resistance (compressive, flexure, spittling tensile) and fracture energy, at given water to binder ratio, depend on type, particle dimension and content of coarse aggregate. The characteristic length of Hülerborg^ fictitions cracks model increases with the variation in the particle dimension of coarse aggregate.
URI: http://repositorio.ufpa.br/jspui/handle/2011/9650
Appears in Collections:Teses em Engenharia Mecânica (Doutorado) - PPGEM/UNICAMP

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