Estudo da viabilidade do resíduo proveniente das porcelanas de isoladores para utilização em concretos bombeáveis estruturais
Nenhuma Miniatura disponível
Data
2017-08-31
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
This research aims to evaluate the tecniques for disposal of waste obtained from electrical
insulators. These pieces are one of the supplies widely used for electric power generation, and
become a waste due to their replacement for new ones after maintenance and expansion works, in
places like substations, generating units, distribution networks, transmission lines and its own
production process. In Brazil, it is possible to acumulate waste from these insulators in courtyards
and waste areas, besides wastelands, impairing the environment. Thus, it is known that an
alternative for treatment is needed and the lack of knowledge and techical safe forces the
development of reasearches about this subject, what are still in the beggining. So, this study
proposes the evaluation of potential use of such a porcelain in concrete, through the replacement of
conventional aggregates and cement. The research was conducted with a careful characterization of
the waste in different maximum dimension sizes, with physicochemical and mineralogical analysis
obtained from X-Ray diffration and images from scanning eletronic microscopy, for example.
Besides, tests of alkali-aggregate reaction were perfomed in order to assess the chemical stability
of the waste in mortar. Regarding to viscoelastic and mechanical properties, the compressive
strength, modulus of elasticity, water absorption, and abrasion/erosion were performed. The
experimental program considered eleven different mixes of pumped concrete, take into account the
following replacement rates: 8% replacement of cement; 50% and 100% replacement of fine
aggregate; and 45% and 100% replacement of coarse aggregate. Some mixes were done with both
replacement of fine and coarse aggregate. The investigation of mechanical strength, deformation
and durability, in conditions aforementioned, demonstrates that concrete with replacement was
statistically similar to concrete without any replacement by waste, resulting a suitable concrete
with porcelain waste content. The efficiency of compressive strength ranged from 0,087 MPa/kg to
0,107 MPa/kg and the modulus of elasticity reached values up to 38 GPa, indicating expressive
results for these properties. Lastly, in research is possible to observe the conclusions about
reological characteristics of all concrete and the influence of these replacement on cement content.
Descrição
Citação
Vieira, F. L. Estudo da viabilidade do resíduo proveniente das porcelanas de isoladores para utilização em concretos bombeáveis estruturais. 2017. 122 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2017.