Design approaches for sustainable concrete mixes and structural components (P. 2)

Fig. 04: Strategies and examples for the reduction or replacement of Portland cement clinker for the production of structural concrete Figure: Profs. Müller/Haist
Fig. 04: Strategies and examples for the reduction or replacement of Portland cement clinker for the production of structural concrete
Figure: Profs. Müller/Haist
Fig. 05: Comparison of ordinary concrete C30/37 (“ord”) and green concrete (“green”, cement replacement by rock powder); concrete compositions (left) and concrete properties (right) Figure: Profs. Müller/Haist
Fig. 05: Comparison of ordinary concrete C30/37 (“ord”) and green concrete (“green”, cement replacement by rock powder); concrete compositions (left) and concrete properties (right)
Figure: Profs. Müller/Haist
Fig. 06: Example for the design of concrete members by means of the design equation for sustainability as given in (fib Model Code, 2023) Figure: Profs. Müller/Haist
Fig. 06: Example for the design of concrete members by means of the design equation for sustainability as given in (fib Model Code, 2023)
Figure: Profs. Müller/Haist
Formel 2 Figure: Profs. Müller/Haist
Formel 2
Figure: Profs. Müller/Haist
Harald S. Müller Professor Emeritus, Dr.-Ing., Institute of Building Materials and Concrete Structures, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany Figure: KIT
Harald S. Müller
Professor Emeritus, Dr.-Ing.,
Institute of Building Materials and Concrete Structures, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Figure: KIT
Michael Haist Professor, Dr.-Ing., Institute of Building Materials, University of Hannover, Hannover, Germany. ORCID https://orcid.org/0000-0002-3827-3915 Figure: University of Hannover
Michael Haist
Professor, Dr.-Ing., Institute of Building Materials, University of Hannover, Hannover, Germany. ORCID https://orcid.org/0000-0002-3827-3915
Figure: University of Hannover

Changes in the current use of concrete materials and design approaches are mandatory in order to comply with the requirements imposed on future sustainable concrete structures. Before this background, the article indicates the design of sustainable concrete mixes (green concretes or eco-concretes) and the structural components made from them. Part 1 was already published in BFT issue 8/25, read here Part 2.

3 Sustainable concrete mixes

3.1 Approaches

In order to meet the requirements of sustainability concerning concrete as a building material, the currently used concrete compositions must be fundamentally changed. In particular, the Portland cement clinker (PC), which is associated with extremely high CO2 emissions, must be substituted as far as possible by more environmentally friendly binders, for example, secondary cementitious materials (SCM) and/or new types of hydraulic binders. Further, substitution with inert fines of aggregates is also a very promising approach to significantly reduce the...

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BFT 09/2025

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BFT 09/2025

Ressort:  SUSTAINABILITY | NACHHALTIGKEIT
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