When bridges, dam walls and other structures made of concrete are streaked with dark cracks after a few decades, the culprit is AAR: the alkali-aggregate reaction. AAR damages concrete structures all ...

Large concrete structures need to be regularly tested for defects that may compromise their stability. While acoustic tests performed by certified inspectors are usually the inspection method of ...

Cracking is a natural, expected, and accepted behavior of concrete. However, cracks may affect the appearance, function, durability, service life, or more seriously, the structural integrity of the ...

A pair of airmen inspect a crack on the runway to determine its severity at Ellsworth Air Force Base, S.D., July 19, 2013. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released) The ...

Given the survival of ancient structures, this may seem curious. The critical difference is the modern use of steel reinforcement, known as rebar, concealed within the concrete. Steel is made mainly ...

The Korea Institute of Civil Engineering and Building Technology (KICT) has announced the development of an effective structural strengthening method using a noncombustible carbon textile grid and ...

Materials researchers from the Block Research Group at the ETH Zurich, together with architects supermanoeuvre, have revealed a prototype for an ultra-thin, sinuous concrete roof system with an ...

Concrete is probably as close to a wonder material as we’re ever going to get. It’s extremely strong, cheap, versatile, and long-lasting. The Romans used it to build many of their oldest surviving ...