COMPARISON OF TWO TYPES OF BINDERS NATURALS ON THE MECHANICAL AND THERMAL PROPERTIES OF TYPHA LEAF POWDER PANELS

Abstract

This paper is a contribution to the valorization of Typha Australis as building material. The aim of this article is to develop 100% vegetal insulation boards based on powder of typha leaves and gum arabic and starch binders. The comparison of the nature of the binder on the mechanical and thermal properties was carried out. The influence of binder content on the mechanical and thermal insulation properties of panels of typha-gum Arabic and typha-starch was examined too. The density is very small in the case of starch than in the case of gum arabic. The typha-gum arabic panel is 1.17 times more dense than that of typha-starch, for 33.33 % binder. The typha-starch board, for 50 % binder, showed a good compressive strength (1.05 MPa) and is 1.36 times stronger than the typha-gum arabic board. The best thermal conductivity is obtained with the typha-starch board (0.051 W.m-1.K-1) for 33.33 % binder. The thermal conductivity values are close to or lower than many of natural insulating materials. It was also concluded that the typha - gum arabic panels are more effusive.

Keywords

• Typha
• gum arabic
• starch
• mechanical strength
• thermal conductivity
• thermal effusivity

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