Quote:
Originally Posted by zamler
|
This is super cool. The two parts I'm a little skeptical on is a) land use and water use needed to produce at scale, b) I don't see how it can possibly be carbon neutral nevermind net negative if using lime.
90% of the CO2 emissions from making concrete is producing lime. It's still better for GHG emissions than actual concrete likely due to Incorporation of biomass, but you'd need to see carbon intensity of both the lime production and agricultural process of the hemp. You'd also need to see what GHG emissions look like for the steel structure in the block vs rebar in concrete.
The unique properties of insulation and strength may go some ways to reduce heading needs which would also offset some GHG too.