Liberation of original natural aggregates from recycled concrete by abrasion comminution

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Recycling of concrete waste into structural concrete reduces the consumption of raw materials, decreases transport and production energy costs, and saves the use of limited landfill space. Since attached mortar is known for lowering the performance of recycled concrete aggregates (RCA) in concrete applications, current recycling involves the use of RCA as a road base material or in non-structural concrete with low strength requirements. Therefore, the application in structural concrete is limited. In general, the applicability of RCA is improved by comminution through various crushing methods. Hereby, the parent particles are cleaved or shattered into a minimum of two particles with a comparable size and a number of much smaller particles. Through this technique, both mortar and aggregates fracture alike, resulting solely in a size reduction. However, to minimise undesirable effects, original natural aggregates (ONA) have to be cleared from attached mortar. Through the use of attrition and shear instead of pressure or impact, surface layers, edges and corners are removed, producing particles both slightly smaller and much smaller than the initial. In this study, ONA liberation through abrasion was investigated.
Originele taal-2Engels
Titel6th International Conference on Non-Traditional Cement & Concrete
RedacteurenV. Bílek, Z. Keršner, H. Šimonová
Plaats van productieBrno
UitgeverijNOVPRESS
Pagina's316-323
Aantal pagina's8
Volume6
ISBN van geprinte versie978-80-214-5507-8
StatusGepubliceerd - 2017
Evenement6th International Conference on Non-traditional Cement & Concrete(NTCC2017) - Hotel Continental, Brno, Tsjechië
Duur: 19 jun 201722 jun 2017
Congresnummer: 6
http://www.fce.vutbr.cz/stm/fracture/symposium2017/
http://www.fce.vutbr.cz/stm/fracture/symposium2017/

Congres

Congres6th International Conference on Non-traditional Cement & Concrete(NTCC2017)
Verkorte titelNTCC 2017
LandTsjechië
StadBrno
Periode19/06/1722/06/17
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  • Citeer dit

    van de Wouw, P. M. F., Florea, M. V. A., & Brouwers, H. J. H. (2017). Liberation of original natural aggregates from recycled concrete by abrasion comminution. In V. Bílek, Z. Keršner, & H. Šimonová (editors), 6th International Conference on Non-Traditional Cement & Concrete (Vol. 6, blz. 316-323). NOVPRESS.