Modelling and predicting the generation of post-demolition autoclaved aerated concrete (AAC) volumes in Germany until 2050

Steins, Justus J.; Volk, Rebekka; Schultmann, Frank

doi:10.1016/j.resconrec.2021.105504

Cited by 18 publications

(23 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, landfilling could nearly completely be replaced by pd-AAC recycling. For Germany alone, this results in around 0.73 million m³ landfilled pd-AAC which equals 56% of the 1.3 million m³ of pd-AAC in 2021 [4]. Until 2050, this is predicted to exceed 2.3 million m³ pd-AAC [4].…”

mentioning

confidence: 99%

“…Nowadays, a rising amount of post-demolition AAC (pd-AAC) from the building stock is expected to emerge. [4] estimate a volume of 1.3 million m³ for Germany in 2021 which could increase to more than 4 million m³ in the following decades. Currently, the pd-AAC is collected jointly with other gypsum-containing demolition wastes.…”

mentioning

confidence: 99%

“…For Germany alone, this results in around 0.73 million m³ landfilled pd-AAC which equals 56% of the 1.3 million m³ of pd-AAC in 2021 [4]. Until 2050, this is predicted to exceed 2.3 million m³ pd-AAC [4]. Another 0.44 million m³ (34%) pd-AAC that is expected to be fed to low-grade utilisation in 2021 (1.4 million m³ in 2050) also could be used for high-quality recycling.…”

mentioning

confidence: 99%

“…The process "treatment of waste brick, sorting plant" is used for a combined grading and purifying, because there is no matching process for grading in the database and the treatment usually combines sorting/purifying and grading. Waste brick is comparable to pd-AAC as both are mineral masonry materials, however with slightly differing material densities 4. Pd-AAC is assumed to be transported in a lorry with more than 32 metric tons with EURO6 standard 5.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Comparison of different post-demolition autoclaved aerated concrete (AAC) recycling options

Volk

Steins

Stemmermann

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Autoclaved aerated concrete (AAC) is used as masonry blocks and prefabricated reinforced elements preferably in residential buildings. Due to its porous structure and mineral composition, it combines low thermal conductivity and fire resistance properties. Consequently, the popularity of AAC increases. However, due to significant AAC production volumes in many European countries since the 1960s and 1970s and given building lifetimes, strongly increasing post-demolition AAC waste volumes can be expected in the following decades. Recycling these post-demolition AAC wastes could protect primary resources and landfill capacities and reduce greenhouse gas emissions. But, recycling of post-demolition AAC is not yet established. The majority of the waste is landfilled even though landfill capacities have decreased and the legal framework conditions in Europe regarding a circular economy are becoming stricter. Therefore, new recycling options are needed. Current research approaches propose different open-loop recycling routes for post-demolition AAC, e.g. lightweight aggregate concrete, lightweight mortar, no-fines concrete, floor screed, animal bedding, oil- and chemical binders, and insulating fills for voids and interstitial spaces. Additionally, closed-loop recycling is possible and under research. Finely ground post-demolition AAC powder can be directly used in AAC production or can be chemically converted to belite (C2S) clinker to substitute primary cement in AAC production. These promising recycling options are compared regarding environmental and economic aspects. We find that the resource consumption is lower in all recycling options since post-demolition AAC helps to save primary resources. Furthermore, greenhouse gas emissions associated with the substituted primary resources are saved - especially when substituting primary cement in closed-loop recycling. In economic terms, increasing landfill costs could be avoided, which leaves a considerable margin for the cost of pre-processing, transport and recycling. The results can help decision-makers to implement circular management for AAC by fostering post-demolition AAC recycling and reducing its landfilling.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Comparison of different post-demolition autoclaved aerated concrete (AAC) recycling options

Volk

Steins

Stemmermann

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Die Produktion in der DDR wurde auf Basis von Daten aus [11] beziehungsweise histo rischen Begleitformationen zur Inbetriebnahme der Porenbetonwerke in der DDR (Parchim 1964, Laussig 1970, Calbe 1971, Hennersdorf 1981 [12]) ermittelt. Für die jährliche Porenbetonproduktion ab 2019 wird das durchschnittliche Produktionsvolumen der Jahre 2014-2018 angenommen.Zur regionalen Untergliederung wurde die Bautätigkeits kennzahl "Fertigstellungen Wohnungen in Wohn und Nichtwohngebäuden (Anzahl)" des Statistischen Bundes amtes[13] herangezogen, da sie zum einen eine hohe Korrelation mit der Porenbetonproduktion aufweist[10] und zum anderen Daten auf Kreisebene vorhanden sind[14]. Marktanteile von Porenbeton je Bundesland wurden auf Basis des Anteils von Porenbeton beim Bau von Wohnhäusern bestimmt[15].…”

unclassified

Altporenbeton aus dem Abbruch und Rückbau in Deutschland bis 2050 – eine Vorhersage

Steins

Volk

Kreft³

et al. 2021

Mauerwerk

Self Cite

View full text Add to dashboard Cite

Porenbeton ist aufgrund seiner hervorragenden Dämmeigenschaften ein häufig verwendetes Baumaterial für Mauersteine sowie vorgefertigte bewehrte Bauteile und Mineraldämmplatten – mit wachsender Beliebtheit. Altporenbeton aus dem Abbruch und Rückbau von Gebäuden wird derzeit hauptsächlich deponiert. Deponiekapazitäten nehmen jedoch ab und der rechtliche Rahmen verlangt feste Recyclingquoten. Um ein hochwertiges Recyclingnetzwerk von Altporenbeton zu etablieren, werden Informationen über rezyklierbare Mengen, ihr zeitliches Aufkommen und ihre regionale Verteilung benötigt. Da diese bislang nicht vorhanden sind, wurde ein neues Modell zur Quantifizierung von Altporenbeton unter Nutzung historischer Porenbetonproduktion, Bautätigkeit, regionaler Marktanteile von Porenbeton und Gebäudelebensdauern entwickelt. Das Modell wurde für Deutschland im Zeitraum 1950–2050 (jahresgenau) mit geografischer Unterteilung in 401 Regionen angewendet. In den nächsten Jahrzehnten ist den Ergebnissen zufolge mit stark steigenden Altporenbetonaufkommen zu rechnen. Das Aufkommen in Deutschland könnte von 160.000 m3 (2000) über 1.200.000 m3 (2020) auf mehr als 4.000.000m3 (2050) ansteigen. Es werden signifikante Mengen v. a. in großen deutschen Städten wie Berlin, Hamburg, München, Bremen, Hannover, Köln, Frankfurt und Stuttgart erwartet. Diese Ergebnisse bieten eine Entscheidungshilfe für die Kreislaufführung von Altporenbeton in Bezug auf Standort‐ und Kapazitätsplanung sowie Logistik.

show abstract

EAACA net‐zero roadmap for autoclaved aerated concrete

Turski¹

2022

ce papers

View full text Add to dashboard Cite

This roadmap sets out a pathway for Autoclaved Aerated Concrete products to reach net‐zero emissions by 2050 with the potential to become carbon negative, thereby absorbing more carbon dioxide from the atmosphere than they produce. The roadmap aligns the European Autoclaved Aerated Concrete Association (EAACA) and its members with the objectives of the Paris Agreement to limit global warming to 1.5°C and supports policies to decarbonize Europe's buildings and construction sectors.

show abstract

Modelling and predicting the generation of post-demolition autoclaved aerated concrete (AAC) volumes in Germany until 2050

Cited by 18 publications

References 22 publications

Comparison of different post-demolition autoclaved aerated concrete (AAC) recycling options

Comparison of different post-demolition autoclaved aerated concrete (AAC) recycling options

Altporenbeton aus dem Abbruch und Rückbau in Deutschland bis 2050 – eine Vorhersage

EAACA net‐zero roadmap for autoclaved aerated concrete

Contact Info

Product

Resources

About