In my searches on the internet i often stumble across info that is new to me and might be useful to other in the prepping community
One of these such items is the catalan vault
the catalan vault is a really great idea and can be manufactured with limited resources, is very solid and can provide very stong buildings.
the tiles used in the vault can be simple clay dried in the sun . and can be stuck together with a simple plaster –
check out some of these links for more info