Aproveitamento de filer de pedreiras da região metropolitana de Goiânia em pavimentos flexíveis urbanos [manuscrito]: avaliação técnica e sócio-ambiental
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2008-11-27
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Universidade Federal de Goiás
Resumo
The generation of industrial waste has been the object of increasing attention in the field of Science and
Technology because of the problems which arise when it is stored and inadequately disposed of. This can have
negative consequences for the worker, the company and for the neighboring population. In addition it can
generate liabilities for the environment. Measures which internalize such liabilities for the productive system are
necessary, but not sufficient to bring about large scale changes in what concerns the sustainable management of
solid waste. Therefore, there is an urgent need for technical and participative solutions. Technical solutions
would make it viable to reuse or reduce the generation of waste, while participative solutions would reduce the
negative consequences for communities and bodies who directly or indirectly are part of this process. In this
context, waste from the quarrying of crushed stone was studied in the metropolitan Region of Goiânia.
Quarrying is an important source of resources for the economic development of the region but it is also a great
generator of solid waste. The research began with the physical and chemical characterization of filler, which
forms the greatest volume of solid waste, resulting from quarrying and focused on its general effects on health. It
also evaluated how the workers in these companies relate to the environmental issue in this context in which they
live. A survey with questions was distributed and from the answers it could be concluded that the profile of these
workers is extremely lacking in information which would provide them with information to deal with legal
aspects directly related to their activity. Furthermore, it could be seen that specific methodologies in
Environmental Education are needed to attend to these cases. It was also detected that the accumulation of filler
can be harmful to society in terms of health. This is because of its physical and chemical characteristics, and in
particular its considerable concentration of silica. These facts justify the need to find a technical solution to
reduce the quantity of this waste. Hence it was decided to test different blends of natural soil and filler, using
laboratory tests based on soil mechanics, with a view to investigating the possibility of using filler in road
pavement, as it absorbs enormous quantities of material in its constituent layers and has attracted the attention of
researchers in an effort to find new alternative uses for the different types of industrial waste. At this phase, tests
were carried out for characterization, CBR, dynamic triaxial tests, permeability, compressive strength using
varied quantities of lateritic clay soil as filler. From the results of these tests it was possible to claim that
proportions of 30% filler added to compacted soil with modified energy and 20% filler added to compacted soil
with intermediate energy can be used for base and sub base purposes, respectively, in flexible urban pavements
with light traffic. The result of the resilience module points to the need for prudence in the use of filler, as
repeated loads of filler in the test showed that the samples which were most appropriate in the CBR Statistical
Test can undergo processes leading to a loss of mechanical resistance. After deciding in the laboratory on the
most appropriate proportions of soil-filler for use in pavements, an experimental track was built using this
material. An analysis of its behavior was done using the following field tests: sand flagon test, speedy, dynamic
cone penetration, loading plate and Benkelman beam. The results of these tests were compared with those
obtained from a track built in the same location with soil-crushed rock and lateritic gravel, both considered
conventional material. It could be concluded that the mechanical behavior of the experimental track built with
soil-filler blends are adequate for the conditions established by the technical norm in force up until the moment
they were monitored, since its mechanical behavior is comparable to that obtained when using conventional
materials
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Citação
LUZ, Marta Pereira da. Use of filer of quarries in the metropolitan area of
Goiania flexible pavements in urban [manuscript]: assessment
technical and socio-environmental. 2008. 104 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2008.