▲ 87 ▼ 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 20 comments fedilink hide all child comments
[–] AlmightyDoorman@kbin.earth 2 points 2 months ago Okay yeah this is true. permalink fedilink source parent