Flexural Fatigue of High and Ultra High Strength Fiber Reinforced Concrete

Title: Flexural Fatigue of High and Ultra High Strength Fiber Reinforced Concrete
Author(s): Eleni S. Lappa, C. René Braam, Joost C. Walraven
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 509 - 518
Total Pages: 10
Nb references: 8
Language: English

Abstract: This paper presents the results of an experimental study on the bending behaviour of two concrete mixtures. A high strength fibre reinforced mortar, with a maximum aggregate size of 2 mm and 1.6% by volume of 13 mm long, 0.16 mm in diameter steel fibres and an ultra high strength concrete, with a maximum aggregate size of 7 mm and 2.5% by volume of 20 mm long, 0.3 mm in diameter steel fibres were used. The bending behaviour was tested with a four point bending test under static and fatigue loading on small beams (125/125/1000 mm.) The static bending performance highly depends on the fibre distribution in the beam; the more fibres are present, the higher the load bearing capacity. The way fibres are distributed and orientated depends on the casting method. Even though the fibres increase the maximum flexural tensile strength and improve the post-peak static behaviour, their contribution to the fatigue resistance is not very pronounced. The fatigue performance of both mixtures can be compared with conventional concrete, though fatigue results are difficult to evaluate due to the high scatter. The scatter, however, can be reduced by improving the workability and flow ability in the fresh state of a concrete mixture, in combination with an appropriate production technique.

Online publication: 2005-05-15
Classification: Special Considerations
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.055