Aircrete

https://www.youtube.com/watch?v=z4_GxPHwqkA

• 15g Xanthan gum in a large container (e.g. a normal-sized pot).
• A splash of rubbing alcohol
  Mix to form a pre-wetted slurry
• 60mL (1/4 cup) of dish detergent (e.g. Dawn ultra, or same top ingredients)
  Stir together, then add:
• 1L water
  Stir stir lightly and let sit for 5-10 min.

1 part above mixture
2 parts cement mix

Mix until expanded to the desired aeration
The properties of the final aircrete will depend on how vigorously or how long it is mixed. At some point it will change from open-cell to closed-cell.