Permeability of ultra high performance fiber reinforced concretes (UHPFRC) under high stresses |
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| Authors: | J-P Charron E Denarié E Brühwiler |
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| Affiliation: | (1) Group for Research in Structural Engineering, Ecole Polytechnique of Montréal, Montréal, Canada;(2) Maintenance and Safety of Structures, Swiss Federal Institute of Technology - Lausanne, Lausanne, Switzerland |
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| Abstract: | Ultra High Performance Fiber Reinforced Concretes (UHPFRC) present outstanding mechanical properties and a very low permeability
which make them very attractive for the rehabilitation of existing structures and for new conceptions. UHPFRC are characterized
by a significant tensile strain hardening (multiple cracking stage) that can be used to optimize the mechanical performance
of composite structural elements. In order to validate this assumption, permeability tests were carried out on UHPFRC specimens
previously submitted to various levels of tensile deformation with progressive damage. Based on permeability results, it was
possible to define maximal tensile deformations whereby the water permeability of a specific UHPFRC remains low for various
exposure conditions. |
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