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TAILORED COMPOSITE UHPFRC-CONCRETE STRUCTURES

  • E Denariè
  • E. BrÜhwiler

Abstract

The extremely low permeability of Ultra High Performance Fiber Reinforced Concretes (UHPFRC) associated to their outstanding mechanical properties make them especially suitable to locally "harden" reinforced concrete structures in critical zones subjected to an aggressive environment and to significant mechanical stresses. UHPFRC materials can be applied on new structures, or on existing ones for rehabilitation, as thin watertight overlays in replacement of waterproofing membranes, as reinforcement layers combined with reinforcement bars, or as prefabricated elements such as curbs. Tailored composite UHPFRC-concrete structures promise a long-term durability which helps to avoid multiple interventions during the service life of structures. With this aim in view, an extensive research and development program was conducted to demonstrate the applicability of UHPFRC for the improvement of structures, including laboratory tests as well as full-scale pilot tests of application on site. This paper reports on two main aspects of the project: (1) the experiences gathered during first full scale tests of applications on a bridge, in Switzerland, (2) the underlying more fundamental aspects related to the potential of UHPFRC in the tensile hardening domain and the sound characterization of this important mechanical property. Key words: UHPFRC, cracking, restraint, eigenstresses, composite construction, tensile

Keywords

Bridge Deck Autogenous Shrinkage Road Infrastructure Restrained Shrinkage Ultra High Performance Fiber Reinforce Concrete 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 2006

Authors and Affiliations

  • E Denariè
    • 1
  • E. BrÜhwiler
    • 1
  1. 1.Division of Maintenance and Safety (MCS)Ecole PolytechniqueFèdèrale de LausanneLausanne

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