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Author(s):	Seifert, Wiebke; Lieboldt, Matthias
Title:	Ressourcenverbrauch im globalen Stahlbetonbau und Potenziale der Carbonbetonbauweise - Globale Herausforderungen des Bauwesens
Abstract:	Die Bauindustrie ist maßgeblich mitverantwortlich für den zunehmenden Verbrauch an materiellen und energetischen Ressourcen und wird weltweit vom Jahrhundertbaustoff Stahlbeton dominiert. Dieser Aufsatz behandelt das Potenzial, das in der Anwendung von Carbonbeton für eine nachhaltige und ressourceneffiziente Betonindustrie liegt. Zunächst werden die aktuelle globale sowie die deutsche Rohstoffsituation im (Stahl-)Betonbau zahlenmäßig dargestellt. Dabei wird auf Vorkommen, Verfügbarkeit und Verbrauch der einzelnen Rohstoffe eingegangen und eine Abschätzung des jährlichen globalen Betonverbrauchs vorgenommen. Daraufhin erfolgt eine energetische Aufschlüsselung einzelner Ressourcen und der daraus entstehenden globalen Herausforderungen des Bauwesens im Hinblick auf die Bedeutung einer nachhaltigen Bauweise. Abschließend werden die Potenziale der C3-Bauweise (C3 - Carbon Concrete Composite) anhand eines materialbezogenen und systemischen Vergleichs von Stahl- und Carbonbeton untersucht und in Zusammenhang gesetzt. Global challenges in the construction industry regarding the aspect of resource consumption - Resource consumption in global reinforced concrete construction and potentials of carbon concrete composites The construction industry is partly responsible for the increasing consumption of material and energetic resources. It is worldwide dominated by the building material of the century: steel reinforced concrete. The following paper deals with the potential which lies in the use of carbon concrete for a sustainable and resource-efficient concrete industry. First, the current global and German resource situation in (steel reinforced) concrete construction is presented in numerical terms. The occurrence, availability and consumption of the resources are discussed and an estimate of the annual global concrete consumption is made. Then the energy consumption of individual resources is shown and the resulting global challenges for the construction industry with regard to the importance of sustainable construction methods are analyzed. Finally, the potentials of the C3 construction method (C3: Carbon Concrete Composite) are investigated and put into context on the basis of a material-related and systemic comparison of steel and carbon concrete.
Source:	Beton- und Stahlbetonbau 115 (2020), No. 6
Page/s:	469-478
Language of Publication:	German

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