– Christoph Alfes, Dresden, und Udo Wiens, Berlin – Stahlfasern verbessern die Gebrauchstauglichkeit von Beton und liefern einen Tragfähigkeitsbeitrag im Biegezug- und Zugbereich. Sie werden verwendet, um den Verschleißwiderstand zu erhöhen und die Auswirkungen des Schwindens zu reduzieren. Wenn sie in tragenden Bauteilen eingesetzt werden sollen, waren bisher Zustimmungen im Einzelfall oder allgemeine bauaufsichtliche Zulassungen erforderlich. Um für die Anwendbarkeit von Stahlfasern im Beton eine breite Basis zu schaffen, ist vom Deutschen Ausschuss für Stahlbeton eine Richtlinie erarbeitet worden. Damit liegen Regelungen für eine statische Mitwirkung der Stahlfasern vor, um so die Zugkraftverstärkung der Fasern im Beton nutzen zu können. Die Richtlinie korrespondiert mit den Betonnormen DIN 1045 und DIN EN 206-1. In dem Beitrag wird die Richtlinie mit ihren Anforderungen beschrieben. – Steel fibre concrete complying with the DAfStb guidelines – potential uses and challenges – Steel fibres have been used for decades in concrete construction. They were used to increase the abrasion resistance of the concrete or to reduce the effects of shrinkage. They were also used in load-bearing structural elements. However, this required agreement in the individual case or general building inspectorate approval. Efforts were therefore made, especially by the construction industry, the concrete industry and the fibre manufacturers, to develop a wide basis for use of steel fibres in concrete. This has now been accomplished in the form of the guidelines issued by the DAfStb (German Committee for Reinforced Concrete). It was essential that regulations should be created for the contributory structural effect of the steel fibres so that the increase in tensile strength provided by the fibres in the concrete could be utilized. It was also very important that the regulations should be arranged in such a way that the building inspectorate committees could give their support to the contents of the guidelines so that the new regulations could be adopted by the building inspectorate. The guidelines are divided into three parts and correspond to the DIN 1045 series of standards. This means that the “Steel fibre concrete” guidelines change and supplement the specified sections of DIN 1045-1, DIN EN 206-1, DIN 1045-2 and DIN 1045-3 for steel fibre concrete and in some cases add new paragraphs. The DAfStb guidelines represent an important milestone in the development of steel fibre concrete as through their publication they not only represent the generally recognized state of the art but there is also every prospect that they will be adopted by the building inspectorate.