Short wave infrared hyperspectral imaging based procedures for quality control of recycled aggregates from end-of-life concrete
Recycling of demolition waste (DW) can contribute to secure ample supplies of concrete aggregates for high-value "green concrete" production, limiting the non-renewable resources exploitation that cause several environmental (i.e. land loss, impacts and pressures due to quarry activities, etc.) and economical (i.e. costs linked to transport, waste of materials still usable, etc.) drawbacks (Lotfi et al., 2014; Di Maria et al., 2016; Vefago and Avellanda, 2013).
To answer to the market requirements, recycled aggregates must be competitive with natural aggregates, in terms of physical-mechanical characteristics influencing the workability, compressive strength and durability of the new concrete (Arasan et al., 2010). More in detail, the presence of contaminants such as plastic, brick, gypsum, wood, etc. have to be absent or below limits determined by law and recycled aggregates have to be liberated from mortar paste.
In the last years, in order to provide sustainable solutions able to combine the need of raw materials with waste reduction, many efforts have been addressed to develop, set-up and apply innovative technologies and approaches to maximize DW conversion into secondary raw materials. In this perspective, the realization of a suitable sensor technology able to identify the presence of pollutant materials and to detect the degree of liberation of recycled aggregates in the output of a DW recycling plant can play a key role for quality control purposes. To reach this goal, a HyperSpectral Imaging (HSI) system can be adopted in order to perform non-destructive and rapid analyses. In this work, the utilization of a HSI sensor working in the short-wave infrared (SWIR: 1000-2500 nm) range to check the quality of the output stream, resulting from a DW recycling plant, was investigated.
| Copyright: | © ANTS - Institut für anthropogene Stoffkreisläufe an der RWTH Aachen | |
| Quelle: | SBSC 2018 (März 2018) | |
| Seiten: | 5 | |
| Preis inkl. MwSt.: | € 2,50 | |
| Autor: | Prof. Silvia Serranti  Prof. Dr-Ing. Giuseppe Bonifazi Roberta Palmieri | |
| Artikel weiterleiten | In den Warenkorb legen
| Artikel kommentieren |
Diese Fachartikel könnten Sie auch interessieren:
Zur Rechtsprechung des EuGH im Umweltrecht im Jahr 2023
© Lexxion Verlagsgesellschaft mbH (8/2024)
Die in der diesjährigen Übersicht über die umweltrechtliche Rechtsprechung des EuGH berücksichtigten Urteile aus dem Jahr 2023 betreffen folgende Themata: Rechtsschutz (II.), Zugang zu Umweltinformationen (III.), Umweltverträglichkeitsprüfung (IV.), Industrieemissionen und Luftreinhaltung (V.), Klimaschutz (VI.), Gefahrstoffrecht (VII.), Abfallrecht (VIII.) und Naturschutzrecht (IX.).
(Geschützte) natürliche Lebensräume als Gegenstand eines Umweltschadens
© Lexxion Verlagsgesellschaft mbH (6/2024)
The article concerns the question of whether environmental liability under EU law for damage to natural habitats is limited to designated protected areas of the Natura 2000 network or whether such habitats outside protected areas are also covered. It examines thewording and structure of the Environmental Liability Directive and comes to the conclusion that the provisions of the directive are designed for natural habitats in protected areas and cannot be applied to habitats outside of them.
Das Meeresmüllproblem und die Abfallwirtschaft von Grönland
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (1/2024)
Grönland weist eine wilde und raue Natur auf. Die Bewohner meistern ihren Alltag unter arktischen Bedingungen, wozu auch die Abfallentsorgung gehört. Grönland hat jedoch ein Meeresmüllproblem, das im Rahmen einer Sommerschule vor Ort untersucht wurde.
Lichtemissionen und Wasser
© Springer Vieweg | Springer Fachmedien Wiesbaden GmbH (6/2023)
Der Begriff Lichtverschmutzung hat sich mittlerweile etabliert, auch wenn er im Vergleich zu anderen Verschmutzungen missverstanden werden kann. Lichtverschmutzung bedeutet nicht, dass das Licht verschmutzt wird, wie beispielsweise die Luft bei der Luftverschmutzung.
Challenges for the Traceability of NGTs From a Legal Perspective
© Lexxion Verlagsgesellschaft mbH (11/2022)
The regulation of new genomic techniques (NGTs) by European gene echnology law is not only of scientific-academic value, but also affects quite considerable economic interests. While the use of the corresponding technologies in the “red sector” – i.e. for human medical purposes – is still viewed with restraint in view of the risks to human health that are to be ruled out, the hoped-for multi-billion revenues in the “green sector” of plant biotechnologymean that less restraint tends to be exercised here.
