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Jigs, Hydrocyclones and Sensor-Based Sorting to Value Recycled Aggregate

  • Régis Sebben ParanhosEmail author
  • Carlos Hoffmann Sampaio
  • Bogdan Grigore Cazacliu
  • Raul Oliveira Neto
  • Maria Alejandra Liendo
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The proposition of this paper is to introduce a sorting platform aiming to increase quality on recycled aggregates by supplementary use of mineral processing techniques and more sorting. The difficulty of liberation is discussed and the methodology currently used in mineral processing is proposed. Jigs, hydrocyclones and sensor-based sorting are equipments considered as having good performances to sort adequately recycled aggregates. On the other hand, new perspectives of sorting and liberation for recycling aggregates are discussed. Based on current process in recycling platforms, the new process with supplementary sorting of the concrete recycled is presented. The gain in density and the reduction in water absorption were studied. The relation between the water content and the density of aggregates is analysed for three quality levels of recycled aggregates. Finally, the gain in density and the reduction in water absorption were linked with rates of replaced aggregates. In our study, replacing a lower quality aggregate by another with medium quality leads an expected gain in density about 4%. On the other hand, if replaced by superior quality, the expected gain will be 8.4%. As consequence, 34% on reduction in water absorption could be obtained too.

Keywords

Recycling aggregates Jigs Hydrocyclones Sensor-based sorting 

Notes

Acknowledgements

The Coordination for the Improvement of Higher Education Personnel (CAPES) and the CNPq from Brazil, Federal University of Pampa (UNIPAMPA), Federal University of Rio Grande do Sul State (UFRGS) and the French Institute of Science and Technology for Transport, Development and Networks (IFSTTAR) are acknowledged.

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Copyright information

© The Minerals, Metals & Materials Society 2017

Authors and Affiliations

  • Régis Sebben Paranhos
    • 1
    Email author
  • Carlos Hoffmann Sampaio
    • 2
  • Bogdan Grigore Cazacliu
    • 3
  • Raul Oliveira Neto
    • 1
  • Maria Alejandra Liendo
    • 1
  1. 1.Federal University of Pampa—UNIPAMPABagéBrazil
  2. 2.Federal University of Rio Grande do Sul—UFRGSPorto AlegreBrazil
  3. 3.GPEM LaboratoryUniversity of Nantes (LUNAM)/IFSTTARNantesFrance

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