Pisos intertravados com a incorporação de resíduos minerais
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Data
2014-08-29
Autores
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Universidade Federal de Goiás
Resumo
In crushing rocks for the production of aggregates for the construction
industry, a large amount of residue (artificial sand and quarry dust) is generated. The
artificial sand is already used as fine aggregate replacing the natural sand of the river. The
quarry dust, instead, remains stored in the courtyards of the producers of aggregates and
their improper disposal can cause environmental problems and to human health. Seeking
a technically and environmentally correct disposal for this waste, in this research it is
studied the effect of incorporation on the mechanical properties and durability of
concrete paving blocks. It was analyzed the compressive strength at 07, 28 and 90 days
and the absorptions at 28 days. Six mixtures were studied: one reference mixture 1:2
(cement: total dry aggregates) (without addition of quarry dust) and five with replacement
of 10% of the total aggregate for the quarry dust. It was also evaluated the effect of the
addition of a plasticizer additive in the features mentioned above. The results showed that
the incorporation of quarry dust was beneficial. There was an increase of resistance found
in mixture 1:2 with quarry dust compared to mixture 1:2 without quarry dust. As the
absorption, there was no significant difference between these mixtures. As the plasticizer
additive, its effect caused significant decreases in both resistance values and the
absorptions as compared to mixtures not containing additives. From the perspective of
environmental protection, results were also promising considering that in all mixtures was
replaced 10% of the total aggregate (sand and coarse aggregate) for quarry dust
generated by the crushing of rocks.
Descrição
Palavras-chave
Resíduo da construção, Pó de brita, Pisos intertravados, Buidings waste, Quarry dust, Concrete paving blocks
Citação
LOPES, Rayane Campos; BACARJI, Edgar. Pisos intertravados com a incorporação de resíduos minerais. Revista Eletrônica de Engenharia Civil, Goiânia, v. 9, n. 1, p. 22-36, 2014. DOI: https://doi.org/10.5216/reec.v9i1.28021. Disponível em: https://revistas.ufg.br/reec/article/view/28021. Acesso em: 28 dez. 2022.