Estudo de misturas compostas por resíduos de scheelita e diferentes tipos de solos destinados a pavimentação
Over time, the need to reuse solid waste increases to reduce the environmental impacts caused by its storage. Mining is an activity that generates a significant volume of tailings that result from the ore beneficiation process. The scheelite beneficiation process causes a high amount of waste and...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/49506 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | Over time, the need to reuse solid waste increases to reduce the environmental impacts
caused by its storage. Mining is an activity that generates a significant volume of tailings that
result from the ore beneficiation process. The scheelite beneficiation process causes a high
amount of waste and its largest Brazilian deposit is located in the municipality of Currais
Novos/RN, in the scheelite province comprising the Brejuí, Barra Verde, Boca de Laje and
Zangarelhas mines. Thus, this research intends to analyze the use of these residues of the
coarser, fine and benefited types in mixtures with three local soils, for application in layers of
pavements for adequate disposal of these residues. From data obtained in previous research
with processed scheelite residues, fine and coarse optimized mixtures were obtained to verify
possible classification in granulometric gradings of national and international standards with
residue proportions of 20, 40 and 60 %. The results showed that the mixtures of waste with Soil
01 had more significant effects because this composition has a coarser granulometry and zero
plasticity, demonstrating a greater potential for use in road paving works. However, Solo 02
and Solo 03 did not allow compliance with the analyzed regulations due to their higher
proportions of fine materials and greater plasticity. In view of its use as a material for pavement
base layers, the mixture of Solo 01 with 20% of processed waste made it possible to fit into
Ranges “D” and “E” of national and international standards and all mixtures with 20% of thick
residue allowed the framing in the “E” lanes, so that these proportions revealed a qualitative
potential for use in road works. |
|---|