Natürliche Recarbonatisierung von Kalksandstein

Ein neuer Ansatz zur Bewertung der Nachhaltigkeit

verfasst von: Wolfgang Eden, Nabil A. Fouad, Zakaria Istanbuly
Abstract: Natural recarbonation of calcium silicate masonry unit: A new approach to sustainability assessment. The recarbonation of calcium silicate masonry units represents a natural process in which calcium silicate hydrates (CSH phases) formed during autoclaving absorb CO₂ from the surrounding air during the usage phase. This article presents the results of comprehensive investigations into the recarbonation of calcium silicate masonry units, conducted between 2021 and 2024 on 76 representative samples using chemical-mineralogical analyses. A central finding of these investigations is that one ton of calcium silicate masonry units can permanently bind around 50 kg of CO₂. The recarbonation process occurs gradually from the outside inward into the calcium silicate masonry material and is completed within a period of 50 years. Furthermore, this article introduces a novel calculation approach that enables the quantification and assessment of the sustainability of calcium silicate masonry units. In addition to integrating ecological, economic, and technical parameters, this approach also allows for a well-founded forecast of the amounts of CO₂ bound through recarbonation over defined time periods.
Organisationseinheit(en): Institut für Bauphysik
Externe Organisation(en): Forschungsvereinigung Kalk-Sand e.V.
Typ: Beitrag in Publikumszeitung/-zeitschrift
Journal: BAUPHYSIK
Band: 47
Seiten: 22-32
Anzahl der Seiten: 11
ISSN: 0171-5445
Publikationsdatum: 02.2025
Publikationsstatus: Veröffentlicht
ASJC Scopus Sachgebiete: Environmental engineering, Architektur, Bauwesen
Elektronische Version(en): https://doi.org/10.1002/bapi.202400040 (Zugang: Geschlossen)

BibTeX

@misc{21657b7b2ae541dfa85e2e4685b09587,
title = "Nat{\"u}rliche Recarbonatisierung von Kalksandstein: Ein neuer Ansatz zur Bewertung der Nachhaltigkeit",
abstract = "Natural recarbonation of calcium silicate masonry unit: A new approach to sustainability assessment. The recarbonation of calcium silicate masonry units represents a natural process in which calcium silicate hydrates (CSH phases) formed during autoclaving absorb CO2 from the surrounding air during the usage phase. This article presents the results of comprehensive investigations into the recarbonation of calcium silicate masonry units, conducted between 2021 and 2024 on 76 representative samples using chemical-mineralogical analyses. A central finding of these investigations is that one ton of calcium silicate masonry units can permanently bind around 50 kg of CO2. The recarbonation process occurs gradually from the outside inward into the calcium silicate masonry material and is completed within a period of 50 years. Furthermore, this article introduces a novel calculation approach that enables the quantification and assessment of the sustainability of calcium silicate masonry units. In addition to integrating ecological, economic, and technical parameters, this approach also allows for a well-founded forecast of the amounts of CO2 bound through recarbonation over defined time periods.",
keywords = "calcium silicate masonry unit, carbon dioxide reduction, ecological building material, masonry, recarbonation, sustainability assessment",
author = "Wolfgang Eden and Fouad, {Nabil A.} and Zakaria Istanbuly",
note = "Publisher Copyright: {\textcopyright} 2025, Ernst und Sohn. All rights reserved.",
year = "2025",
month = feb,
doi = "10.1002/bapi.202400040",
language = "Deutsch",
volume = "47",
pages = "22--32",
journal = "BAUPHYSIK",
issn = "0171-5445",
publisher = "John Wiley and Sons Ltd",
}