Spanish firms AMSA and ELSAN, with the Polytechnic University of Catalonia, replaced conventional mineral filler in bituminous road mix with biochar made from olive pits and pine waste. Lab results show comparable durability to standard asphalt, with up to 75% lower CO₂ emissions in the surface layer. The project won Barcelona's "21st Century Street" urban challenge.
(c) Leonardo del Sabio

Barcelone teste un asphalte à base de noyaux d’olive réduisant les émissions de 75%

ECOINVENTOS

Les entreprises espagnoles AMSA et ELSAN, avec l’Université polytechnique de Catalogne, ont remplacé le filler minéral des enrobés bitumineux par du biocharbon issu de noyaux d’olive et de résidus de pin. Les tests en laboratoire montrent des performances comparables à l’asphalte classique, avec jusqu’à 75% d’émissions de CO₂ en moins dans la couche de surface. Le projet a remporté le défi urbain barcelonais «La chaussée du XXIe siècle».

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