Lightweigt concrete with recycling aggregates made from masonry rubble and rubble-clay mixtures

  • Structural lightweight concrete is a construction material composed primarily of lightweight aggregates (LWA), cement and water. Most LWA are produced by thermal treatment of natural raw materials such as clay and shale today. In addition to the high energy costs thereby incurred, the availability of suitable raw materials is limited. An alternative is the use of recycling LWA made from Mineral construction and demolition waste. Recycling LWA made from masonry rubble and rubble-clay mixtures were studied in two different research projects. The technology pursues the idea of feedstock recycling, which means the recycling is based on the chemical and mineralogical composition of the masonry rubble and clay. The recycling LWA are produced in a multistage manufacturing process by thermal hardening in laboratory and pilot scale. Their particle bulk densities and particle strengths vary between 600 and 2000 kg/m³ and 1.5 and 13 MPa, respectively. Their equivalence to traditional LWA wasStructural lightweight concrete is a construction material composed primarily of lightweight aggregates (LWA), cement and water. Most LWA are produced by thermal treatment of natural raw materials such as clay and shale today. In addition to the high energy costs thereby incurred, the availability of suitable raw materials is limited. An alternative is the use of recycling LWA made from Mineral construction and demolition waste. Recycling LWA made from masonry rubble and rubble-clay mixtures were studied in two different research projects. The technology pursues the idea of feedstock recycling, which means the recycling is based on the chemical and mineralogical composition of the masonry rubble and clay. The recycling LWA are produced in a multistage manufacturing process by thermal hardening in laboratory and pilot scale. Their particle bulk densities and particle strengths vary between 600 and 2000 kg/m³ and 1.5 and 13 MPa, respectively. Their equivalence to traditional LWA was proven in comprehensive tests of the aggregates themselves as well as the mortars and concretes made therefrom. Our contribution reports on the results of the characterization of the recycling aggregates compared to expanded clays and the studies on LWA concretes.zeige mehrzeige weniger

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Metadaten
Autor*innen:Katrin RübnerORCiD
Koautor*innen:A. Schnell, Toni Ihlenfeldt, M. Vöge
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2018
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.4 Baustofftechnologie
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:Construction and demolition waste; Feedstock recycling; Lightweight aggregates; Lightweight concrete; Masonry rubble; Recycling aggregates
Themenfelder/Aktivitätsfelder der BAM:Umwelt
Umwelt / Circular Economy
Veranstaltung:RECYCLE18 - Fourth International Conference Progress of Recycling in the Built Environment
Veranstaltungsort:Lisbon, Portugal
Beginndatum der Veranstaltung:11.10.2018
Enddatum der Veranstaltung:12.10.2018
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:22.11.2018
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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