Mechanical Behaviour of a Ultra-high Performance Fibre Reinforced Cement Composite Submitted to Impact Loading Conditions

Title: Mechanical Behaviour of a Ultra-high Performance Fibre Reinforced Cement Composite Submitted to Impact Loading Conditions
Author(s): Pierre Rossi, Edouard Parant
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: 539 - 547
Total Pages: 9
Nb references: 9
Language: English

Abstract: The multi-scales fibre reinforcement of this cement composite is characterized by the gradual and continuous activation of the various fibres scales until the peak strength. The studied material can be modelled as an elasto-plastic one with positive work hardening in tension. In order to cover a large range of loading rate, two dynamic tests are carried out using two four points bending test device on thin slabs: an hydraulic press and a block bar device. Results indicates that the modulus of rupture increases by 25 percent in the range of quasi-static loading rate [1.25x10-4 - 1.35 GPa/s], and that strength is quadrupled for loading rate superior to 500 GPa/s. Results indicate that this new material is more sensitive to the loading rate effects than all others cement materials. The direct tensile strength increases by about 1.5 MPa/log10 unit under quasi-static loading.

Keywords: cement composite, impact; multiscale fibre reinforcement; stress rate effects, ultra-high performance, steel fibres.

Online publication: 2005-05-15
Classification: Special Considerations
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.058