Title :

Influence of different surface treatments on the water absorption capacity of flax fibres Rheology of fresh reinforced-mortars and mechanical properties in the hardened state

Author(s) :

Page, J. [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Khadraoui, F. [Auteur]
École Supérieure d'ingénieurs des Travaux de la Construction [ESITC Caen]
Gomina, M. [Auteur]
Laboratoire de cristallographie et sciences des matériaux [CRISMAT]
Boutouil, M. [Auteur]
École Supérieure d'ingénieurs des Travaux de la Construction [ESITC Caen]

Journal title :

Construction and Building Materials

Pages :

424-434

Publisher :

Elsevier

Publication date :

2019

ISSN :

0950-0618

English keyword(s) :

Cementitious composite
Flax fibre
Mechanical properties
Surface treatment
Toughness
Workability

HAL domain(s) :

Chimie
Chimie/Matériaux
Chimie/Chimie théorique et/ou physique
Chimie/Cristallographie

English abstract : [en]

An experimental investigation was undertaken on the influence of different surface treatments of flax fibres on mortar properties in both fresh and hardened states. Three types of coating were explored for surface modification ...
Show more >An experimental investigation was undertaken on the influence of different surface treatments of flax fibres on mortar properties in both fresh and hardened states. Three types of coating were explored for surface modification atmospheric-pressure plasma, mineral coating made of a grout of cement and ground granulated blast-furnace slag, and polymer coating based on linseed oil. Water absorption tests were performed to evaluate the performance of the coatings. Water absorption kinetics and/or water retention capacity were drastically modified by the plasma treatment at atmospheric-pressure and by the linseed oil treatment. The workability of the pastes incorporating fibres coated with the cement grout or linseed oil was greatly improved compared to the raw fibres. The presence of fibres significantly increases the rate of entrapped air, which seems to depend on the nature of the coating. In the hardened state, regardless of the nature of the fibre coating, the flexural strength increases beyond 90 days of curing. Up to 320 days of curing, the compressive strengths of the different composites are similar to that of the control mortar, except for the composite with linseed oil coated-fibres which proves to be the most porous. The presence of flax fibres also enhances the mortar toughness and prevent from desiccation cracking. Nevertheless, none of the treatments experimented in this work makes it possible to preserve the beneficial effects of fibres on the mechanical behaviour of composites in the long term. © 2018 Elsevier LtdShow less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire Génie Civil et géo-Environnement (LGCgE) - ULR 4515

Source :

Harvested from HAL