Concrete can patch itself up

05/30/2013 | Economist (tiered subscription model), The

A self-healing concrete developed by Chan-Moon Chung of South Korea's Yonsei University uses two chemicals that form a protective waterproof polymer in sunlight. The chemicals, contained in tiny capsules, can be applied via spray to concrete. When a crack forms, the capsules break and release the chemicals, which harden and bond with the concrete surface to prevent water accumulation.

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Economist (tiered subscription model), The

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