Résumé
The building sector continues to seek solutions to reduce its carbon footprint, as this industry plays a crucialrole in the fight against global warming. Bi-obased concretes show great promise as a sustainable andenvironmentally friendly material for construction. They help lowering the carbon footprint while offeringthermal and acoustic performances. However, their use re-quires a comprehensive understanding of theirmechanical and physical properties to optimize their application in the construction industry. Despite theirpotential, limited data is available on their reaction to smoldering fire. In this study, the EN 16733 standardtest was conducted in FCBA laboratories on 34 different biobased concrete formulations to assess theirtendency to smolder. The results highlighted that the most influential factors are the den-sity of the biobasedconcretes and the binder nature. Lime appears to offer less protection against smoldering fire development.Several hypotheses were proposed to explain this observation. The basicity of calcareous binders promotesextensive charring of the bioresource at high temperatures, which is the driving force for smoldering.