A tough new ceramic material that is almost twice as strong as concrete may be the key to providing high-quality, low-cost housing throughout developing nations. The ceramic is called Grancrete, which, when sprayed onto a rudimentary Styrofoam frame, dries to form a lightweight but durable surface. Using conventional techniques, it takes 20 men two weeks to build a house. A five person crew can construct two grancrete homes in one day. »
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