Add Yahoo as a preferred source to see more of our stories on Google. Researchers still puzzle over exactly how Roman concrete was made, but they have a few clues, including many of its ingredients ...

In 2014, hundreds of Angelenos gathered downtown to watch more than 2,000 trucks pour concrete into a vast hole. During that event, Los Angeles set a world record: 80 million pounds of concrete were ...

Every year the world uses 4 billion tonnes of cement to make the concrete that goes into buildings and other infrastructure. It leaves a huge carbon footprint, and comes with other costs too. Civil ...