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Lightweight aggregates made from construction and demolition waste - Application in lightweight concrete and mortars

  • Heterogeneous construction and demolition waste can be used as raw material to produce lightweight aggregates (LWA) similar to expanded clays. In the joint research project “REALight”, LWA were produced from masonry rubble in a thermal expanding process using a pilot production plant with a rotary kiln. Our research focuses on the characterisation of the novel LWA and their use in different hydraulically bound applications. Infra-lightweight concrete (ILC) was produced with the novel LWA, which accounts for two thirds of total aggregate volume, and Celitement, which is a hydraulic binder with a low carbon footprint. Its dry bulk density is ≤ 800 kg/m³. Strength and durability properties are comparable to ILC data from the literature. Lime-based repair mortars (LRM) containing LWA are beneficial for sandstone conservation due to their similar properties regarding porosity, water absorption and strength. A two-layer repair mortar system, which consists of a filling mortar to fill largeHeterogeneous construction and demolition waste can be used as raw material to produce lightweight aggregates (LWA) similar to expanded clays. In the joint research project “REALight”, LWA were produced from masonry rubble in a thermal expanding process using a pilot production plant with a rotary kiln. Our research focuses on the characterisation of the novel LWA and their use in different hydraulically bound applications. Infra-lightweight concrete (ILC) was produced with the novel LWA, which accounts for two thirds of total aggregate volume, and Celitement, which is a hydraulic binder with a low carbon footprint. Its dry bulk density is ≤ 800 kg/m³. Strength and durability properties are comparable to ILC data from the literature. Lime-based repair mortars (LRM) containing LWA are beneficial for sandstone conservation due to their similar properties regarding porosity, water absorption and strength. A two-layer repair mortar system, which consists of a filling mortar to fill large voids and a covering mortar to modulate the surface texture to the historic sandstone, was developed. In our contribution, we present results of the LWA characterisation according to the European standard EN 13055:2016. Requirements and challenges of the use of the novel LWA in ILC and LRM are discussed.zeige mehrzeige weniger

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Metadaten
Autor*innen:Julia Seher, Katrin RübnerORCiD, Constanze Müller, F. Martin, N. Pniok, B. Dreisow
Persönliche Herausgeber*innen:I. Döring, Y. Villagran Zaccardi, A. Müller
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of the V International Conference Progress of Recycling in the Built Environment
Jahr der Erstveröffentlichung:2023
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.4 Baustofftechnologie
Verlag:RILEM Publications S.A.R.L.
Verlagsort:Champs-sur-Marne, Frankreich
Jahrgang/Band:PRO 137
Erste Seite:85
Letzte Seite:92
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:CDW recycling; Lightweight aggreagtes; Lightweight concrete; Masonry rubble; Repair mortar
Themenfelder/Aktivitätsfelder der BAM:Umwelt
Umwelt / Circular Economy
Veranstaltung:V International Conference Progress of Recycling in the Built Environment
Veranstaltungsort:Weimar, Germany
Beginndatum der Veranstaltung:10.10.2023
Enddatum der Veranstaltung:12.10.2023
ISBN:978-2-35158-238-1
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:04.12.2023
Referierte Publikation:Nein
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