Technical and environmental feasibility of interlocking concrete pavers with iron ore tailings from tailings dams.
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Data
2017
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Resumo
The present paper evaluates the technical and environmental feasibility of using iron ore tailings (IOTs) as fine aggregate in the
production of interlocking concrete blocks. Initially, environmental, chemical, and physical characterizations of the tailings were carried out.
Pavers with IOTs replacing natural aggregate in proportions from 10 to 80% were manufactured and subjected to physical analyses
(expansion, porosity, and water absorption), environmental analyses (leaching and dissolution), as well as mechanical tests (compressive
strength and surface abrasion). Test results of the IOT pavers were compared to conventional ones and to standard limits. The IOT pavers
showed physical and mechanical properties significantly similar, or superior, to the conventional ones, and all within the requirements for
regular traffic. Therefore, IOT are technical and environmentally feasible to be used in the production of precast concrete blocks. This reuse
also contributes to the reduction of the social and environmental impacts associated to tailings dams.
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Palavras-chave
Interlocking concrete blocks, Precast concrete, Reuse of solid waste, Sustainable cement-based
Citação
SANT'ANA FILHO, J. N. et al. Technical and environmental feasibility of interlocking concrete pavers with iron ore tailings from tailings dams. Journal of Materials in Civil Engineering, v. 29, p.1-6, 2017. Disponível em: <http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29MT.1943-5533.0001937>. Acesso em: 29 set. 2017.