Influência dos Agregados Graúdos da Região de Goiânia no Módulo de Deformação Tangente Inicial do Concreto
Carregando...
Data
2009-11-24
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
This research is carried out to study the influence of aggregate source on the initial tangent
modulus of deformation of concrete (Eci), to correlate the resistance to compression (fc) with
the module Eci and compare the results of this research with the equations proposed by
international standards and the Brazilian.
To this end, it was used three levels of resistance to 28 days: 20MPa, 30Mpa and 40Mpa and
ranged up the aggregate source in the types lithological micaschist, Granulito and Basalt. Set
the type of cement, sand, water, and additive content of mortar. All materials are used in
dosages of Goiânia and the surrounding region in order to determine the behavior of these
materials in concrete that is produced in the region.
The experimental program of this research is divided into two parts. The first is to determine
the curves of strength of each aggregate source test of resistance to compression in the age of
three, seven and 28 days, while the second part determines the initial tangent modulus of
deformation on the ages of seven and 28 days.
For the first part of the experimental program were molded 54 body-of-evidence and tested
for resistance to compression. For the second part was molded 90 body-of-evidence, where 36
were tested for resistance to compression and 54 with the initial tangent modulus of
deformation. With the end of testing was performed a statistical analysis of results obtained
through software STATISTIC.
In the analysis it was the influence of aggregate source in the initial tangent modulus of
deformation (Eci), noting influences the levels of resistance adopted and distinct variations in
the influence of aggregate source studied on the Eci, by increasing order of the results of
module: micaschist, granulito and basalt.
The results also indicated that the NBR 6118 (ABNT, 2003) overestimates the values of
modulus of deformation of concrete.
Descrição
Citação
BARBOSA, Isa Lorena Silva. Influence of coarse aggregate in the region of Goiânia Initial Tangent Modulus of Deformation of Concrete. 2009. 136 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2009.