This amazing video was posted by the national geographic, and it presents a revolutionary new material that can be very helpful in many situations. This incredible material is called concrete canvas and it is specific because it has all the elements of concrete, but is flexible enough to be turned into any shape. It works very simple, the fabric is very light and flexible when it is dry, but when exposed to water, it hardens into a concrete shell, in as little as 24 hours.
What you can see on this video are couple of guys trying to construct a tent. It takes less than an hour to build it, and when hosed down with water this solid cement bunker can provide you shelter from all kinds of exposure. It is a truly astonishing material, that can be used for any kind of housing, or pop up buildings.