Sharing this here because it looks applicable to solarpunk

  • cerement@slrpnk.net
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    1 year ago

    primary thing on the Roman concrete was the addition of ground limestone – any cracks or fractures would be “self-healed” by the limestone

    I don’t know of blood or fat being used for the concrete, but for the lime wash – with application of soap, lime wash becomes waterproof, forming tadelakt

    • webghost0101
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      1 year ago

      I think it was a few weeks ago that National Geographic was playing at my inlaws.

      If i recall correctly the roman concrete that was recreated by the show had to harden in a vat of water after which it was more durable then modern concrete. The blood was spoken about like a mysterious secret ingredient… but that could have been just tv flair. The show after was about aliens.