Grout is any viscous (thick and sticky liquid which does not flow easily), packable material that can be used to fill the space between two elements for bonding them or to create a water-tight seal.
Grout is generally a mixture of cement, sand and water used to fill gaps. They are used in the repair of concrete cracks, fill seams and gaps in tiles, seal and fill gaps for waterproofing, and for soil stabilization. It is also used for giving extra strength to the foundations of load-bearing structures.
Grouts are used in a variety of application such as repair of cracks, water – stopping in submerged structures such as canals, tunnels, etc., fill seams between tiles, and for stabilizing soil. Here we have briefed about types of grouts used in the repair of cracks.