Introduction of resistance classes in the future concrete standard

Concepts to ensure the durability of concrete structures

Currently the durability aspects of concrete structures are regulated in the standards in a descriptive way. Depending on the exposure class, specified by the designer, in the concrete stan-dard certain minimum requirements are defined referring the maximum water/cement ratio, minimum cement content, minimum compressive strength etc. However, the relevant properties themselves such as carbonation resistance or freeze resistance are not directly considered. Rather it is assumed that with those indirect parameters, which are determined on empirical basis, the durability of the concrete can be...

Related articles:

Issue 2015-02 Stocretec

Reinforcing structures with spray mortar and carbon fiber grid

At a strengthening increase of 170?%, very high fire resis-tance and simple application, the combination of “Sto S&P Armo spray mortar” is well suited for reinforcing structures – both technically...

more
Issue 2019-02 Cements of the future

Which materials can we use?

Resource efficiency and climate protection will continue to challenge the method of concrete construction. However, there is no silver bullet in sight. New approaches such as the carbon dioxide...

more
Issue 2014-11 Wayss & Freytag

Concrete with increased acid resistance for pipes and shafts

Conversion of the subterranean wastewater treatment plants between the German cities of Dortmund and Dinslaken results in an ecological upgrading of the catchment area of the EmscherRiver and...

more
Issue 2013-02 Limitations of EN 13791

Evaluation of the compressive strengths of concrete on new and existing structures

When converting structures to other uses following damage, negative results of the conformity and acceptance tests, faulty execution of the construction, or when the adequacy  of the existing...

more
Issue 2017-02 Requirements applying to structure and use

Durability of small wastewater treatment plants and the materials of which their tanks are made

The implementation of version EN 12566-3:2005+A2:2013 fundamentally changes the requirements applying to the durability of small wastewater treatment plant and the materials of their tanks.Until now,...

more