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 inajaribu lami ya mbegu za zeituni inayopunguza uzalishaji kwa 75%

ECOINVENTOS

Makampuni ya Uhispania ya AMSA na ELSAN, pamoja na Chuo Kikuu cha Polytechnic cha Catalonia, yalibadilisha kijaza madini cha lami ya kawaida na mkaa wa kibiolojia unaotokana na mbegu za zeituni na mabaki ya mti wa pine. Majaribio ya maabara yanaonyesha utendaji unaolingana na lami ya kawaida, huku ikipunguza uzalishaji wa CO₂ hadi 75% katika safu ya juu ya barabara. Mradi huu ulishinda changamoto ya mijini ya Barcelona «Barabara ya karne ya 21».

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