Investigation of the Bond Behavior of UHPC

Abstract:

Ultra High Performance Concrete - UHPC has become increasingly used. Its outstanding features are generally known. It is a fact that the bond of the reinfocement in UHPC is better than that in ordinary concrete, but this bond needs to be quantified .The aim of the experimental research was to determine the average bond stress between prestressing strands and different types of UHPC and to show very significant increase in the average shear stress in bond with UHPC compared to ordinary concrete. In order to determine the bond capacity, an experimental research was carried out. Experimental details of the models in real structures – parts of prestressed girders made from UHPC, were tested in the laboratory and the results were compared with specimens prepared according to standard. The influence of different material properties and different anchorage length of prestressing strands to bond behavior of UHPC was examined in pull out tests. Test results of bond test led to the conclusion that the application of UHPC can significantly reduce the anchorage length of reinforcement compared with the ordinary concrete.

• Periodical: Applied Mechanics and Materials (Volume 617)
• Pages: 225-228
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.617.225
• Online since: August 2014
• Authors: David Citek*, Petr Huňka, Stanislav Rehacek, Jiří Kolisko
• Keywords: Bond of Reinforcement, Prestressed Girders, Pull-Out Test, UHPC

References

[1] D. Citek, J.L. Vitek, Soudržnost betonářské výztuže a UHPC, Proceedings of 11th Conference Technologie Betonu, Jihlava, Czech Republic, 2013, pp.87-92.

[2] D. Citek, J.L. Vitek, Bond of Reinforcement and UHPC, Proceedings of 20th Czech Concrete Day 2013, Hradec Králové, Czech Republic, 27-28. 11. (2013).