Comment on YSK: You can make supercapacitors out of cement, water and carbon black
SchmidtGenetics@lemmy.world 1 month ago
That’s neat, but a typical house foundation only uses like 10-15 cubic meters of concrete. Even a flat 8” slab for a 40’x40’ house (huge footprint!!!) uses 30 cubic meters of concrete.
Concrete is also pricey already ~$250 a meter (CAD, US is close).