Grout is a mixture commonly used to fill joints between tiles in small domestic projects, and usually features a simple composition of water, cement and sand. However, this is not its only application: in structures that are designed to support heavy loads, such as bridges, grout is injected as a filler in post-tensioning systems, where the cables running through the conduits inside them provide a flexibility that the concrete covering them does not have.
Formula studied for a type of grout capable of ‘self-repairing’ cracks in large buildings
