This work concerns the technical study of implementation, thermal and mechanical characterization
of a composite material based on clay and plant fibers, in order to meet the need for bioclimatic and
sustainable houses. The objective was to find the proportions of clay and fibers to obtain a mixture
that would give better thermal properties. A characterization of the thermal properties was made
thanks to the KD2 Pro analyzer on samples of various formulas of mixture clay-plant fibers. The
results obtained showed that the thermal properties such as thermal conductivity and thermal
diffusivity of the clay-fiber mixture samples decrease with the increase of the fiber content in the
mixture. Thus, the thermal conductivity of the samples varies from 0.85 to 0.65 W/m.K; from 0.88 to
0.72 W/m.K and from 0.83 to 0.75 W/m.K respectively with Hibiscus cannabinus L. fiber, sawdust
and Oryza sativa husk. As for the thermal diffusivity, it varies from 0.37 to 0.25 mm2
/s; from 0.45 to
0.30 mm2
/s and from 0.47 to 0.27 mm2
/s respectively with the addition of Hibiscus cannabinus L.
fibers, sawdust and Oryza sativa husk. In sum, the earth samples stabilized with Hibiscus
cannabinus L. fibers offer better thermal properties for the construction of bioclimatic houses.

Composite material; bioclimatic houses; thermal conductivity; thermal diffusivity