*you just spent a bunch of energy heating old organic waste* If the heat generat...

		onion2k on Aug 23, 2023 \| parent \| context \| favorite \| on: Coffee grounds make concrete 30% stronger you just spent a bunch of energy heating old organic waste If the heat generated by the curing process in concrete is suffice then you get that for free. Better in fact, because you're making waste heat useful.