Aproveitamento de resíduos da extração de micaxisto em pavimentos flexíveis
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Data
2008-06-24
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Universidade Federal de Goiás
Resumo
The recycling of materials has been strengthened as an efficient mechanism to minimise the
problems caused by improper disposal of solid waste from human activities. Accordingly, the
search for mechanisms able to absorb the waste from quarry, coming from the production of
aggregates for construction, it becomes an important tool for mitigating externalities
generated by the accumulation of such material. So the main objective of this research was to
study the use of waste material from quarry as the basic constituent of layers and sub-base of
flexible pavements. The residue studied comes from the processing of micaxist, and then
called the dust of micaxist, coming from the quarry of the Department of Roads Rodagem the
city of Goiania (DERMU-COMPAV). To assess the mechanical behavior, laboratory tests
have been conducted (specific weight, Limits of consistency, size, compression, expansion
and California Bearing Ratio) for samples: 1 (100% of micaxist powder), 2 (20% of powder
micaxist and 80% soil), 3 (30% of powder micaxist and 70% only), 4 (soil), 5 (gravel) and 6
(30% crushed 1 and 70% soil). To assess the performance on the field of materials studied,
was built in August and September 2007, a trial with a sentence of 300 meters, located at
Amélia Rosa street, the site of Ipês, in Goiânia-Goiás, being divided into three sub-sections
(soil + micaxisto of dust, soil + 1 and crushed gravel). The behaviour of these sub-sections
were examined by means of testing the vial of sand, Speedy, proof of cargo on board, and
dynamic cone penetromet, made during the execution of the sentence trial. With the data
collected can be verified that the materials studied, with the exception of Sample 1, have
shown properties physical and mechanical satisfactory, reflecting in a good technical
performance in the laboratory and in field. The gravel had better results both in the laboratory
to the field, proving the efficiency of such material has traditionally used in flooring. In
general, concluded that for the dust of micaxist, the best performance was obtained for dosing
20% (Sample 2), comparable to traditional materials, thus demonstrating the possibility of
using such waste in layers of sub-base and base of flexible pavements.
Descrição
Citação
ARAUJO, Weliton Eduardo Lima de. Institutional assessment and teaching practice in education
Utilization of waste from the extraction of mica in flexible pavements. 2008. 142 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2008.