To get a general idea how light and high in the water that kind of structures float watch the video of a small test piece floating on the water surface.
Due to the cement binder in the composite structure you have the optical apperance of a rock .
You also get the UV light resistance and the corrosion resistance of rock (concrete).
Which points at a service livespan of 200 years and a life expectance of more than 2000 years.
But you can build it to a very different weight which becomes obvious when you watch the flotation line in the video above.
The weight of the build is the average of the “concrete in the cell walls and the air that is contained in the cell volume”
How light you can build it depends rather on the skills of the builder than the properties of the material.
Nature has perfected this way of making light and tough structures for the marine ambient for millions of years.
For human engineering this is a relative new field that goes way beyond the building of concrete columns and slabs in a simple cast process .
What we developed in the oceanic business alliance is a process that mimiks biology we have construction methods that allow to add ultralight building cells in any direction at any time to a existing structure. So the structure becomes like a living organism it can grow almost inperceptible cell by cell while life and business goes on. What we are used to in engineering that there is a construction phase and then people and business move into the finished building becomes completly obsolete. Our seasteads will grow for ever in the way and rithm life in them requires it.
You can imagine our floating city almost like a termite nest - people live in it - repair it and expand it all the time. If a Draupner wave breaks the structure in two pieces each of the pieces floats like a foamblock .
We are more in the business of “developing revolutionary construction technologies” that solve the technology bottleneck of seasteading than into the “politics of seasteading” this is where our project differs most from other projects mentioned here.
We figure out how to build New-Venice and New-Atlantis, we already have built the test pieces that do the convincing and are in the process to have the phase 1 conversation with visionary investors who are willing to join our project.
We have already built some revolutionary stuff and we keep doing so …
Visualize humans living in a “Termite Nest City” a cellular structure something like this…irregular hollow tubular and cellular pieces forming an integrated and continously growing structure…
Unlike land buildings this structure can survive Draupner impacts, built from the materials in the video above it is absolute unsinkable.