ORCID Profile
0000-0002-4354-4871
Current Organisation
KU Leuven
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Publisher: Elsevier BV
Date: 05-2011
Publisher: Elsevier BV
Date: 10-2019
Publisher: MDPI AG
Date: 05-02-2019
DOI: 10.3390/MA12030488
Abstract: Recent advances in concrete recycling technology focus on novel fragmentation techniques to obtain aggregate fractions with low cement matrix content. This study assesses the aggregate liberation effectiveness of four different treatment processes including standard and innovative concrete fragmentation techniques. Lab-made concrete s les were subjected to either standard mechanical crushing technique (SMT) or electrodynamic fragmentation (EDF). For both fragmentation processes, the influence of a microwave weakening pre-treatment technique (MWT) was investigated. A detailed analysis of the particle size distribution was carried out on s les after fragmentation. The .6 mm fraction was more deeply characterized for aggregate selective liberation (manual classification to separate liberated aggregates) and for cement matrix content (thermogravimetric measurements). Results highlight that EDF treatment is more effective than SMT treatment to selectively liberate aggregates and to decrease the cement matrix content of the .6 mm fraction. EDF fully liberates up to 37 wt.% of the .6 mm natural aggregates, while SMT only liberates 14–16 wt.%. MWT pre-treatment positively affects aggregate liberation and cement matrix removal only if used in combination with SMT no significant effect in combination with EDF was recorded. These results of this study can provide insights to successfully implement innovative technology in concrete recycling plants.
Publisher: Springer Science and Business Media LLC
Date: 30-10-2018
Publisher: Elsevier BV
Date: 05-2016
No related grants have been discovered for Ruben Snellings.