A gunite machine is a piece of equipment used to spray or apply gunite or shotcrete onto surfaces at high velocity. Gunite is typically a dry mix of cement, sand, and water, while shotcrete is a wet mix of cement, sand, and water.
There are two main types of gunite machines: wet shotcrete machines and dry shotcrete machines.
1. Wet Shotcrete Machine: A wet shotcrete machine mixes the shotcrete materials (cement, sand, and water) together into a wet mix before it is sprayed onto the surface. The wet mix is then pumped through a hose and sprayed onto the surface at high pressure using compressed air. Wet shotcrete machines are commonly used for applications where a more consistent and homogeneous mixture is required, as well as for applications where reduced dust emissions are important.
2. Dry Shotcrete Machine: A dry shotcrete machine uses a pre-mixed dry shotcrete material (gunite) that is combined with water at the nozzle before it is sprayed onto the surface. The dry mix is typically fed into the machine's hopper, where it is mixed with water and compressed air before being sprayed onto the surface. Dry shotcrete machines are often used for applications where a quick setting time is required, as well as for projects that require a more cost-effective solution.
Both wet and dry shotcrete machines have their own advantages and are used in different applications based on the specific requirements of the project.
