[middayc]

Very interestin discussion below/above. I just want to say that building with hempcrete, which relies on lime and NHL (natural hydraulic lime) or Baumit Trassitplus whic is some version of roman "cement" relies on may of these principles and is a "modern building technique". It's also much more carbon neutral than many other methods, can produce good thermal dynamics and "breathable" walls. And is DIY friendly.

[dlubarov]

Compared to traditional concrete, isn't hempcrete much weaker and less rigid? It's an interesting material for sure, but I thought it was basically considered non-structural filler.

Autoclaved aerated concrete is worth a mention as well - it's also a decent insulator and somewhat environmentally friendly, while additionally being, light, easy to cut, and somewhat usable as a structural element.