Abstract To conceive structural elements with a cement composite and without any reinforcement except steel fibers is a very exciting and difficult challenge, which can change the building construction fields. To achieve this objective the Laboratoire Central des Ponts et Chaussees (LCPC) has developed a new cement composite, CEMTEC multiscale ®, which is strain hardening in tension and has a very high uniaxial tensile strength, more than 20 MPa. The present paper is on an experimental research related to this composite fatigue behavior. The principal results obtained are the following: – A strong correlation exists between the initial static damage and the fatigue endurance limit. – Below a loading ratio R = 0.65 (ratio between the applied stress and the characteristic static stress), failure during bending fatigue tests never appears with CEMTEC multiscale ® specimen. – An 8% gain is observed between the bending static behavior of the specimens being previously loaded in fatigue and those not being loaded in fatigue.
[1]
Y. Malier,et al.
Effect of steel fibres at two different stages: The material and the structure
,
1987
.
[2]
E. Parant,et al.
Mécanismes d'endommagement et comportements mécaniques d'un composite cimentaire fibré multi-échelles sous sollicitations sévères : fatigue, choc, corrosion
,
2004
.
[3]
M. K. Lee,et al.
An overview of the fatigue behaviour of plain and fibre reinforced concrete
,
2004
.
[4]
P. Rossi,et al.
High Performance Multimodal Fiber Reinforced Cement Composites (HPMFRCC)
,
1997
.
[5]
M. Behloul,et al.
Etude du comportement a la fatigue du BPR fibre
,
2000
.
[6]
Marcel Cheyrezy,et al.
Investigation of hydration and pozzolanic reaction in Reactive Powder Concrete (RPC) using 29Si NMR
,
1996
.
[7]
A. Naaman,et al.
Fatigue characteristics of high performance fiber-reinforced concrete
,
1998
.