You may have heard of fabric tent or plastic sheet tent, but have you ever heard about concrete tent? Sounds strange! Right?

Concrete tents using a material called Concrete Canvas, a fabric that hardens when sprayed with water, can be used to assemble waterproof and fireproof structures in less than 24 hours.

Engineers William Crawford and Peter Brewin have developed a building in a bag that requires only water and air for construction, intended for emergency shelters, and Concrete Cloth, a flexible mat that will harden to a concrete surface on the addition of water.

Look at this video to watch the whole process in action and watch it until the end to get the feeling of satisfaction.

Credit: National Geographic

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