Next-generation concrete

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Science News has an interesting feature about the future of concrete. For example, Ductal is five times as strong as regular concrete, but it also bends a bit under heavy loads and shows "warning" cracks instead of failing in an instant. Agilia packs itself, negating the noisy and time-consuming process of passing a vibrating machine over it. And LiTraCon is the cool translucent stuff pictured here that I posted about last year. Link