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

Barcelona testet Olivenkern-Asphalt mit bis zu 75 % weniger CO₂-Emissionen

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Die spanischen Unternehmen AMSA und ELSAN entwickelten gemeinsam mit der Polytechnischen Universität Kataloniens einen Asphalt, bei dem der mineralische Füllstoff durch Biokohle aus Olivenkernen und Kiefernresten ersetzt wird. Labortests zeigen vergleichbare Leistungswerte wie herkömmlicher Asphalt bei bis zu 75 % weniger CO₂-Emissionen in der Deckschicht. Das Projekt gewann Barcelonas Stadtwettbewerb «Die Strasse des 21. Jahrhunderts».

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