Rehabilitation of concrete structures using Ultra-High Performance Fibre Reinforced Concrete
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An original concept is presented for the rehabilitation of concrete structures. The main idea is to use Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) to “harden” those zones where the structure is exposed to severe environmental and high mechanical loading. All other parts of the structure remain in conventional structural concrete as these parts are subjected to relatively moderate exposure. This conceptual idea combines efficiently protection and resis-tance properties of UHPFRC and significantly improves the structural performance in terms of durability and life-cycle costs of the rehabilitated concrete structure. The concept is validated by means of four applications demonstrating that the technology of UHPFRC is mature for cast in-situ and prefabrication using standard equipment for concrete manufacturing.
[1] E. Brühwiler,et al. Structural Rehabilitations with Ultra-High Performance Fibre Reinforced Concretes (UHPFRC) / Strukturelle Instandsetzung von Betonbrücken mit Ultra-hochleistungsfähigem Faserfeinkornbeton (UHFB) , 2006 .
[2] Emmanuel Denarié,et al. SAMARIS D22 - Full scale application of UHPFRC for the rehabilitation of bridges – from the lab to the field , 2005 .
[3] Eugen Brühwiler,et al. In situ casting of UHPFRC protection layer on crash barrier walls , 2007 .