Glue to bind bridges

A special glass that makes steel stick to concrete

on may 28, an earthquake struck Honduras in Central America. The La Democracia bridge on the Ulua river collapsed. It had been there since 1963 when the French built it. The main reason behind the collapse of bridges during quakes is the weak polymer coating that holds steel and concrete together.

Researchers at the Missouri University of Science and Technology in the US have developed a durable coating from a mixture of glass, an enamel containing calcium silicate particles, clay and water. When the mixture is heated to 760