Scientists replaced 40 percent of cement with rice husk cinder, limestone crushing waste, and silica sand, giving concrete a rubber-like quality, six to nine times more crack-resistant than regular concrete. It self-seals, replaces cement with plentiful waste products, and should be cheaper to use.

This substitution gives slabs of the concrete a somewhat rubber-like quality, allowing them to contract and spring back when subjected to impacts, instead of cracking. In fact, the material is reportedly six to nine times more crack-resistant than regular concrete. Additionally, it self-seals upon being poured, meaning that it could be well-suited to the construction of underground structures such as bunkers

From what the article says, this is likely for military structures and areas prone to trauma or damage and will hopefully find use in civilian markets if it proves a solid replacement for more mundane applications. I could see it being great for road dividers if it resists high impacts and gives a little. I'd be curious to know how it holds up when subjected to extreme temperature fluctuations, like in places with 95°F summers and -30°F winters, or in dangerous situations like a building fire or tornado.

/r/science Thread Link - newatlas.com