Best Guniting services for you
What is Guniting ?
Guniting is a method used in construction for the application of slope stabilization and for certain rehabilitation purposes, mainly in the construction of retaining walls, in the construction of swimming pools, in the construction of tunnels, in the construction of liquid reservoirs and in some repair work.
Guniting was a method of early origin in the US, where the method is defined as the process of spraying a mix or mortar or concrete to a surface of application with the help of a spray gun. This method makes use of a spray gun and hence the process was named as Guniting.
Later, in the time of 1930s a method of spraying concrete or mortar mix with the help of a nozzle spray under compressed pressure and high velocity was followed by the American Railway Engineers Association(AREA).
The American concrete Institute too adopted this method in the 1950s and was named as shotcrete. These institutes never used the word ‘Gunite’ or ‘guniting’. The shotcrete can be carried out with a dry mix or a wet mix.
Now later it came to know that the dry Shotcreting process is called as the guniting. This is how shotcrete and guniting differs. Gunite is merely a trademark where some countries never use the word Gunite, instead uses dry Shotcreting process.
Procedure and Guniting Requirements
Therefore, guniting is called a dry guniting process, in which dry material is transported from a machine through a nozzle to the application surface using compressed pressure and high speed.
Application is facilitated by adding water to the nozzle area. The mixture that eventually comes out is a combination of dry matter and water. The operator has control over the addition of water and the combined water content. The mixture used in the projection is a mixture of cement mortar. Deviations may occur depending on the application and area requirements. Figure 1 below shows a typical layout of a shotcrete or dry shotcrete system guniting
Advantages of Guniting:
The dry- mix shotcrete process is a method that is used widely and have the following advantages:
1. The process of guniting is highly versatile in nature. This method can be applied for structures to occupy any shape say undulating, spherical or curves. This versatility is the major reason why it is used in swimming pools, artificial caves and waterfall etc. so that special shapes and features can be provided. This feature made it employ in application of tunnel lining, slope protection, refractory works and many of the repair works. These also have a diverse use in the construction of dams, reservoirs, bridges, pipelines, and canals.
2. As the water added to the mix is carried out at the nozzle, the control of water is possible. This adjustment can be controlled instantly by the crew while carrying out the spraying procedure. This will hence make it possible to give a mix either wet or dry based on the demand. This is controlled by the addition of water at the nozzle.
3. When compared with the wet shotcrete process, the dry-mix shotcrete or the guniting mix can be prepared quickly. This is more useful in overhead application because if it is wet mix heights would bring problems like sagging or sticking or segregation.
4. For small works like filling the cracks for a smaller region or for very thin lining or coatings or for very fine treatments, it is recommended to opt dry-mix shotcrete process (guniting) when compared with the wet-mix shotcrete process.
5. Guniting is a best choice in those work types were unexpected stoppage of work is possible. The use of wet-mix shotcrete process will be not useful in such situations, resulting in wastage of mix.