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Sustainability in the production of Recycled Concrete Aggregates

  • Concrete is one of the most widely used construction materials and, accordingly, the concrete industry is an important stakeholder in the field of sustainable construction. Therefore various approaches have been implemented to increase the sustainability of concrete. Besides reducing CO2-emissions during cement production, increasing the energy efficiency of buildings and extending their life span, the end-of-life performance of concrete is also an essential aspect of sustainability. Reusing concrete as a secondary building material meets the requirements of sustainability in several ways: the extended time availability of primary raw materials and, thereby, the protection of natural resources as well as conserving landfill site. Furthermore, the production of recycled concrete aggregates (RCA) is a good example for closed-loop recycling. However, regarding the use of RCA as a substitute for natural aggregates in concrete, attention must be paid to all issues of sustainability: thisConcrete is one of the most widely used construction materials and, accordingly, the concrete industry is an important stakeholder in the field of sustainable construction. Therefore various approaches have been implemented to increase the sustainability of concrete. Besides reducing CO2-emissions during cement production, increasing the energy efficiency of buildings and extending their life span, the end-of-life performance of concrete is also an essential aspect of sustainability. Reusing concrete as a secondary building material meets the requirements of sustainability in several ways: the extended time availability of primary raw materials and, thereby, the protection of natural resources as well as conserving landfill site. Furthermore, the production of recycled concrete aggregates (RCA) is a good example for closed-loop recycling. However, regarding the use of RCA as a substitute for natural aggregates in concrete, attention must be paid to all issues of sustainability: this means that environmental, economic and social aspects have to be considered. Since RCA generally have inferior building material properties, such as higher porosity and lower density, the implementation of closed-loop recycling of concrete only makes sense if the technical quality assurance is secured. This paper focusses on the implementation of techniques for the deconstruction/demolition of buildings and the subsequent treatment of concrete rubble in order to improve the building material properties of RCA with regard to the requirements of sustainability and also technical rules and standards.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Karin Weimann, Christian Adam
Persönliche Herausgeber/innen:Roderick Jones, Moray D. Newlands, Judith E. Halliday, Lszlo J. Csetenyi, Li Zheng, Michael J. McCarthy, Thomas D. Dyer
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Environment, Efficiency and Economic Challenges for Concrete
Jahr der Erstveröffentlichung:2016
Organisationseinheit der BAM:4 Material und Umwelt
4 Material und Umwelt / 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung
Herausgeber (Institution):University of Dundee – Concrete Technology Unit
Verlag:University of Dundee – Concrete Technology Unit
Verlagsort:Dundee, UK
Erste Seite:1
Letzte Seite:10
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:Bauschuttaufbereitung; CDW treatment; Gips; Gypsum; RCA (Recycled concrete aggregates); Selective dismantling
Themenfelder/Aktivitätsfelder der BAM:Umwelt
Umwelt / Ressourcenrückgewinnung und Materialverwertung
Veranstaltung:The 9th International Concrete Conference
Veranstaltungsort:Dundee, UK
Beginndatum der Veranstaltung:04.07.2016
Enddatum der Veranstaltung:06.07.2016
ISBN:978-0-9573263-1-6
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:10.11.2016
Referierte Publikation:Nein