Résumé
The building sector is actively seeking solutions to reduce its carbon footprint, as it plays a crucial role in the fight against global warming. Biobased concretes represent a promising class of insulation materials for more sustainable and environmentally friendly construction. However, little data is available on their smoldering reaction. In this work, 34 different biobased concrete formulations were tested using the protocol described in the EN 16733 standard to evaluate their tendency to smolder. The results highlighted two key influencing factors: material density and binder type. Lime-based formulations were found to be more susceptible to smoldering than those using earth or gypsum. To understand lime’s effect, several hypotheses were explored. Findings suggest that the basicity of calcareous binders promotes higher char yields during thermal decomposition, thereby increasing the risk of smoldering. Lastly, this study also assessed the influence of the burner exposure time of the EN 16733 standard for evaluating the smoldering behavior of biobased concretes.