Comment on YSK: You can make supercapacitors out of cement, water and carbon black

SchmidtGenetics@lemmy.world ⁨3⁩ ⁨weeks⁩ 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).

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