Sylvartas comments on Used coffee grounds were charred at 350 degrees Celsius until they became a charcoal-like biochar. That material replaced 15 percent of the sand by volume in a concrete mix

Used coffee grounds were charred at 350 degrees Celsius until they became a charcoal-like biochar. That material replaced 15 percent of the sand by volume in a concrete mix (scienceblog.com)

submitted 2 months ago by inari@piefed.zip to c/environment@sh.itjust.works

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[–] Sylvartas@lemmy.dbzer0.com 4 points 2 months ago

The title says used coffee grounds. It's turning trash into something useful

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