NON-DESTRUCTIVE CHARACTERISATION OF MORTARS REINFORCED WITH VARIOUS FIBRES EXPOSED TO HIGH TEMPERATURE

Mohammed Ezziane (1) , Laurent Molez (2) , Ibrahim Messaoudene (3)

1 ENPO-MA - École Nationale Polytechnique d'Oran Maurice Audin
2 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
3 Université Mohamed El Bachir El Ibrahimi [Bordj Bou Arréridj]

The objective of this study is to investigate the effect of temperature on the physical and mechanical properties of standard mortar reinforced with steel fibers, polypropylene fibers and hybrid fibers. Non-destructive tests (capillary water absorption, interconnected porosity, gas permeability, ultrasound celerity) were carried out on samples that had been heated, at a temperature ramp of 5 degrees C/min, to maximum temperature of 105 degrees C, 400 degrees C, 500 degrees C et 800 degrees C. The results show a good correlation between the evolution of properties and the damage resulting from the imposed heat exposure treatment. The study shows that there is a significant deterioration of physico-mechanical properties of the fiber mortars above 500 degrees C. The hybrid fiber mortars show a good compromise the polypropylene fibers guarantee a thermal stability whereas the steel fibers act to conserve good mechanical behavior.

Keywords: mortars; steel fiber; polypropylene fiber; temperature; non-destructive test

Domains: Engineering Sciences [physics]; Mechanics [physics.med-ph]; Mechanics of materials [physics.class-ph]; Engineering Sciences [physics]; Civil Engineering; Matériaux composites et construction

Mohammed Ezziane, Laurent Molez, Ibrahim Messaoudene. NON-DESTRUCTIVE CHARACTERISATION OF MORTARS REINFORCED WITH VARIOUS FIBRES EXPOSED TO HIGH TEMPERATURE. Mining Science, 2018, 25, pp.179-194. ⟨10.5277/msc182513⟩. ⟨hal-02115863⟩