Résumé
Lightweight earth concretes present a potential alternative as insulat-ing construction materials due to their good thermal and hygrothermal properties. In addition, they can be prepared from renewable natural resources, such as raw earth and agricultural residues, mitigating the energetic footprint of currently used construction materials. Nevertheless, there is still not enough information about the fire resistance of these materials, a factor that impairs their wider ap-plication in construction. In order to deeper understand the fire behavior of these materials, especially concerning their thermal insulation properties, this work studied the thermal transfer of lightweight concretes composed of raw earth and wheat straw, with different densities. The tests were performed using a cone cal-orimeter in a vertical position, instrumented with a pyrometer, a thermal camera and thermocouples to monitor the temperature evolution across the concrete sam-ples. The results show the first insights about the influence of density on the ther-mal transfer and on the velocity of the heat front propagation.