CRIMINAL penalties for non-permitted buildings!

[Seeb]

The strength of Rammed earth depends on the dirt you're using and very much on the person doing the packing and I don't know if there is any nondestructive way to test the finished product.
I do know of one person that is just finishing a large permitted Rammed earth house in orchid land. But they did or supervised every minute of the project.

Highway concrete is subject to water, salt, 100 degree temperature changes and constant motion ( stand on an large bridge with traffic on it)