"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The use of concrete as a construction material has been around for millenia: Historians say that ancient ...

Nobody knows who did it first or when. But by the 2nd or 3rd century B.C.E., Roman engineers were routinely grinding up burnt limestone and volcanic ash to make cementum: a powder that would start to ...

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 ...

Picture yourself walking down a city block. The sidewalk you follow may be obscured by shuffling feet and discarded gum, but it’s clearly made from something hard, smooth, and gray. What may be less ...