I remember hearing that concrete makes its own chemical reaction due to the mixtures of different minerals.
I went to wiki and found this...
Concrete is a construction material that consists of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and
slag cement, aggregate (generally a coarse aggregate such as gravel limestone or granite, plus a fine aggregate such as sand and water) and chemical
admixtures.
Now, would it be possible to find a limestone deposit, mix it with sand and water, and make your own cement?
I ask this because I was talking with my friend about the NWO and Martial Law, he was coming up with ideas to live in the woods away from military
view. He was wondering about shelter, I told him about UAV's and satellite technology that can sift out thermal signatures. This wouldn't be good
in a survival situation. So I came up with the idea of living underground.....
My friend first mentioned living in a cave, but I was thinking more along the lines of making a underground cement shelter.
Using earth as a mold, you can make any sort of shape or wall thickness you desire. You can even make a domed roof to support the weight of the earth
above it. This would make it hard for any thermal tracking devices to trace our whereabouts.
I know its a little extreme, but can it be done?