Combined and synergic effect of algerian natural fibres and biopolymers on the reinforcement of extruded raw earth

• Natural fibres decreases the dry density of earth extrudates. compressive strength increases ductility and Xanthan gum improves interface quality between natural fibres. Diss surface roughness provides interesting reinforcing effects. This paper deals with development sustainable building earth-based materials. More precisely, it addresses study reinforcement raw originated from Algeria (diss date palm tree fibres) their stabilisation xanthan gum. The aim this is design extruded blocks improved mechanical properties such as ductility. effects separate simultaneous addition trees or diss (with length varying 5 15 mm at dosages 1.5 3% in volume) stabiliser (xanthan HMP 1 2% mass) on flexural stabilised unstabilised materials are compared. Results show that adding only fibers comparison unreinforced sample. It also shown better efficiency than a combined create synergic effect greatly material behaviour: higher tensile strengths ductile properties. These results fully supported by microscopic observations pull-out tests carried out single