Concrete Canvas was covered back in 2005 in Wired.
BBC News - Concrete Canvas allows aid teams to construct solid structures in emergency zones quickly and easily. It is a fabric shelter that, when sprayed with water, turns to concrete within 24 hours.
* It is available in 5, 8 and 13 millimeter thicknesses.
* It is ceramic and will not burn
* Once hydrated it remains workable for 2 hours and hardens to 80% strength in 24 hours. Accelerated or retarded formulations can be produced as specified.
* It uses 95% less material than conventional concrete
* It can be used for fast shelters, roofing, retaining walls, basement lining, weed inhibition, flood defense, water tanks and many other applications
The Concrete canvas website
A bag weighing 230 kilograms (approximately 500 pounds) inflates into a shelter with 16 square meters (172 square feet) of floor space. Cost is estimated at £1,100 ($2,100), while an equivalent-size Portakabin (a type of portable building widely used in the United Kingdom) costs about £4,000 ($7,700). The same-size tent costs about £600 ($1,150).
Concrete Cloth featured in the April edition of External Environment Product Review
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