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Articles

Use of plant aggregates in building ecomaterials

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Pages s17-s33 | Published online: 18 May 2012
 

Abstract

The aim of this paper is to compare hemp shiv and sunflower pith properties when they are used as plant aggregates incorporated into a pozzolanic matrix. Scanning electron microscope observation of these aggregates showed distinct microstructures, which could be responsible for the differences in mechanical and thermal behaviour observed between composites including these two types of plant aggregates. The long-term behaviour of composites revealed the mineralization of plant aggregates, in particular hemp shiv, by calcium compounds.

L’objectif de cet article est de comparer les propriétés de la chènevotte du chanvre et de la moelle de tournesol dans le cadre de leur valorisation en tant que granulats végétaux associés à une matrice pouzzolanique. L’observation par microscopie électronique à balayage de ces granulats a permis de mettre en évidence leurs microstructures distinctes. Ceci expliquerait les écarts de comportement mécanique et thermique des composites incorporant ces granulats végétaux. Concernant le comportement a long terme des composites, les résultats mettent en évidence la minéralisation des particules et en particulier de la chènevotte par des composés de nature calcique.

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