Innovative process routes for a high-quality concrete recycling. - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Waste Management Year : 2013

Innovative process routes for a high-quality concrete recycling.

Kathy Bru
A. Lemoign
  • Function : Author
Jean Eric Poirier
  • Function : Author
  • PersonId : 901355
Frédéric von Der Weid
  • Function : Author
  • PersonId : 901357


This study presents alternative methods for the processing of concrete waste. The mechanical stresses needed for the embrittlement of the mortar matrix and further selective crushing of concrete were generated by either electric impulses or microwaves heating. Tests were carried out on lab-made concrete samples representative of concrete waste from concrete mixer trucks and on concrete waste collected on a French demolition site. The results obtained so far show that both techniques can be used to weaken concrete samples and to enhance aggregate selective liberation (that is the production of cement paste-free aggregates) during crushing and grinding. Electric pulses treatment seems to appear more efficient, more robust and less energy consuming (1-3 kW h t−1) than microwave treatment (10-40 kW h t−1) but it can only be applied on samples in water leading to a major drawback for recycling aggregates or cement paste in the cement production process.
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Dates and versions

hal-00877024 , version 1 (25-10-2013)



Yannick Ménard, Kathy Bru, Solène Touzé, A. Lemoign, Jean Eric Poirier, et al.. Innovative process routes for a high-quality concrete recycling.. Waste Management, 2013, 33 (6), pp.1561-1565. ⟨10.1016/j.wasman.2013.02.006⟩. ⟨hal-00877024⟩
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