The cement needed to make concrete – the most widely used man-made material – is a major source of global emissions. Researchers are working on a green replacement that could transform the sector.
'Bendable concrete' is not an oxymoron. Mimicking designs found in nature, engineers are making concrete that gives under stress without shattering – an advance that could improve US infrastructure.
Reinforced concrete is everywhere. But unlike plain concrete, which can last for centuries, reinforced concrete can deteriorate in decades as the reinforcing bars succumb to rust.