Civil engineering: Concrete, heal thyself! It’s useful stuff, concrete, but it does have drawbacks. One of the biggest is that it is not as weatherproof as the stone it often substitutes. Salt and ice… Read more at The Economist 0
Civil engineering: Concrete, heal thyself! It’s useful stuff, concrete, but it does have drawbacks. One of the biggest is that it is not as weatherproof as the stone it often substitutes. Salt and ice… Read more at The Economist 0