Researchers at RMIT University created biochar from used coffee grounds, replacing part of the sand in concrete. The result: up to 30% more strength and a carbon footprint cut by up to 26%. Real-world footpath trials are already underway — waste coffee becoming sustainable infrastructure.
(c) Devin Avery
(c) Devin Avery

Spent coffee grounds turn concrete cleaner and stronger

TECH XPLORE

Researchers at RMIT University created biochar from used coffee grounds, replacing part of the sand in concrete. The result: up to 30% more strength and a carbon footprint cut by up to 26%. Real-world footpath trials are already underway — waste coffee becoming sustainable infrastructure.

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