Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Evaluation of the potential of corn and sunflower bark particles as bio-aggregates for lightweight concrete

Abstract : Biomaterials are an alternative to non-renewable materials. Hemp shives allowed developing an industrial sector favorable to sustainable development. Hence, hemp concrete is currently used as filling material in a timber frame (cast onsite, sprayed or precast). Nevertheless, hemp shiv, the reference biobased aggregate, has a limited availability. It is thus necessary to consider other bio-aggregates largely and locally available. Sunflower and corn stalks were selected for their large availability in south-west of France. The objective of this paper is to evaluate the potential of these two agricultural by-products as alternative bio-aggregates for vegetal lightweight concrete throw the determination of aggregate properties and the study of chemical interactions between plant particles water-soluble compounds and a pozzolanic binder. The results revealed a strong deleterious effect of corn water-soluble compounds on the setting and the hardening mechanisms of the pozzolanic binder. A 24 hours long setting delay was not only observed but an almost complete inhibition of the hardening was also highlighted by the mineralogical analysis and the evolution of the mechanical performances. Sunflower particles could be a good candidate for hemp shives substitution, since their characteristics are similar and their impact on the binder setting and hardening is moderate.
Liste complète des métadonnées

Littérature citée [6 références]  Voir  Masquer  Télécharger

https://hal.inrae.fr/hal-02737511
Déposant : Migration Prodinra <>
Soumis le : mardi 2 juin 2020 - 19:26:03
Dernière modification le : vendredi 12 juin 2020 - 10:43:26

Fichier

bourdot_funchal_2018_1.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

  • HAL Id : hal-02737511, version 1
  • PRODINRA : 458595

Citation

Alexandra Bourdot, Camille Magniont, Méryl Lagouin, Guillaume Lambaré, Laurent Labonne, et al.. Evaluation of the potential of corn and sunflower bark particles as bio-aggregates for lightweight concrete. SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete, Oct 2018, Ile de Madère, Funchal, Portugal. ⟨hal-02737511⟩

Partager

Métriques

Consultations de la notice

17

Téléchargements de fichiers

23