Concrete Tents! Wow. Up in a day.

This is really cool.

Make a concrete Tent, a BIG tent over a few hours time.

Concrete Tent: http://www.concretecanvas.co.uk/index.html

It uses a concrete canvas technology. Simply put it in position -- in this case inflate the tent. And then moisten the canvas. Let it dry and you have a hardened shelter. Put sand around it, and you have a hardened bunker.

Pretty cool.

Look at the video with ~1.5m facebook <likes>...

Winner of a whole bunch of innovation awards including a couple awards from insurance companies and:

• 2011 Most Innovative Product, MIP Expert's Choice
• 2005 World Changing Idea Award, Saatchi & Saatchi
• Material Connection's 2011 Material of the Year Award

The video says that it lasts 10 years or more. Seems like painting it would give it a really long life.

Lots and lots of uses. Ditches, Slope/landslide protection, etc.

There is a 2007 patent application on the material/canvas: 20100233417.