The guniting is the most effective process of repairing concrete work which has been damaged due to inferior work or other reasons. It is also used for providing an impervious layer.
The gunite is a mixture of cement and sand, the usual proportion being 1:3. A cement gun is used to deposit this mixture on the concrete surface under a pressure of about 20 to 30 N/cm2.
Shotcrete is concrete (or sometimes mortar) conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique. It is reinforced by conventional steel rods, steel mesh, and/or fibers. Fiber reinforcement (steel or synthetic) is also used for stabilization in applications such as slopes or tunneling
Shotcrete is usually an all-inclusive term for both the wet-mix and dry-mix versions. In pool construction, however, the term “shotcrete” refers to wet-mix and “gunite” to dry-mix. In this context, these terms are not interchangeable
Shotcrete is placed and compacted at the same time, due to the force with which it leaves the nozzle. It can be sprayed onto any type or shape of surface, including vertical or overhead areas.