Characterization of stem phoenix fibres as potential reinforcement of self compacting mortar

Abstract

In this work, we investigate the effect of different treatment process on stem Phoenix fibres. Underwent different surface modification methods such as alkali treatment with concentration of 10%, epoxy treatment, and combine both of procedures preceded. The treated fibres reinforcement was used in self compacting mortar (SCM) with a length of 20 ± 2 mm and different proportions (0.5, 1, 1.5, 2, 2.5 and 3%) by mortar volume. Flowability of fresh modified self compacting mortar is carried out using two main techniques, including flow table experiments and mini V-funnel flow test. Mechanical performance is derived from bending and compression testing at different curing times. Results show a positive effect of fibre treatment on the rheological and mechanical performances of self compacting mortars. Results show also that optimal formulations need to use fibres treated with (10% NaOH + epoxy resin) by an amount of 3%. These formulations reveal superior mechanical performance compared to all tested mixes after 28 curing days, by 20% in compressive strength and 40% of tensile strength.

Keywords:

• Self-compacting mortar
• stem phoenix fibres
• alkali treatment
• epoxy treatment rheological performances
• mechanical performances

Acknowledgments

The authors are grateful for the invaluable support of L2MGC Laboratory of the University of Cergy- Pontoise (France).