Durability of a Multiscale Fibre Reinforced Cement Composite in Aggressive Environment Under Service Load

The LCPC has developed and patented a new ultra high performance fiber reinforced cement composite (UHPFRCC): the introduction of 3 steel fiber sizes leads to a multiscale fiber reinforced cement composite (MSFRCC) with multi-cracking and hardening behavior in uniaxial tension (ft more than 20 MPa). An innovative test of durability is presented. Precracked thin slabs are damaged by fatigue under loading corresponding to service load (30 MPa in bending test) then maintained under bending at the same level. A part of these slabs undergoes 30 weekly wetting–drying cycles in a chloride solution (NaCl 5%, 20°C). A reloading to failure is led. An absence of corrosion in the microcracked area is noted even for cover lower than 300 μm and a strength increase for predamaged slabs by fatigue. Under service load and in the presence of chloride water, a quasi-total recovery of initial stiffness is possible; it is accompanied by an increase of the pseudo-elastic behavior. The development of a better matrix/micro-fibers synergy and a diffuse microcracking explains this result.

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  • Supplemental Notes:
    • Abstract reprinted with permission from Elsevier
  • Authors:
    • Parant, Edouard
    • Pierre, Rossi
    • Le Maou, Fabrice
  • Publication Date: 2007-7

Language

  • English

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Filing Info

  • Accession Number: 01055572
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 22 2007 7:01PM