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

Submitted ⁨⁨1⁩ ⁨month⁩ ago⁩ by ⁨inari@piefed.zip⁩ to ⁨environment@sh.itjust.works⁩

https://scienceblog.com/m-used-coffee-grounds-were-heated-to-350-degrees-celsius-until-they-became-a-charcoal-like-biochar-that-material-replaced-15-percent-of-the-sand-by-volume-in-a-concrete-mix-and-the-r/