There are chances of terms like “Gunite” and “Shotcrete” to be heard if you are building a new concrete swimming pool. But do you know the difference really?
Basically, to apply the concrete, shotcrete and gunite are different ways. Concrete is the determining factor whether your pool is gunite or shotcrete. Gunite is the term to mean a mix of dry concrete and shotcrete when dealing with wet concrete. The Institute Of American Concrete approved the term “shotcrete” essentially to refer to pneumatically placed mortar in the 1950s (read: to apply concrete using compressed air).
Before you shoot it out of a hose the concrete is already mixed with shotcrete in a cement truck. When you spray it, a dry mix gunite that combines with water is at the nozzle.
In other construction projects like parking structures, and retaining walls, this type of mixtures is also used. But for today, we will stick to pools.
The Construction Process of Concrete Pool:-
The process of construction whether you go with shotcrete or gunite is essentially the same. The ground where you want your pool, the process begins with measuring and excavating. From there the tide steel rebar is installed to reinforce the cage. Next, the plumbing gets installed. Then to encase the rebar it’s time to spray the concrete. That’s the point when you’ll either use shotcrete or gunite.
In the pool’s construction process the next step is to let the concrete cure and finish the shell. You can install the tile, once the concrete is set. You’ll do that next incase of a patio building. To apply finish and enjoy the new pool is all that’s left after.
Application for gunite:-
The gunite application equipment will be loaded with a premixed dry material. Through a nozzle to a hose, compressed air is used to shoot the dry concrete by the pool builders. Then you can add the water. On the surface of your pool, the wet mix is then sprayed out at a high velocity. To get the right consistency of mix the nozzleman controls the application by adjusting water level as needed. As you apply the concrete, the process makes it compress.
Advantages of Gunite:-
Gunite is cheaper.
Without creating weak points, you can start and stop the application with gunite.
Strength is super high with low shrinkage.
Without disturbing the wet concrete, you can walk on it.
To clean up gunite is easier than shotcrete.
The hose is easier and lighter to use.
When you spray, the concrete is very fresh because you add water at the nozzle.
Disadvantages of Gunite:-
Gunite requires a crew much more experienced.
By dry concrete, the hose can get clogged.
It can be tough and messy to clean-up a lot of oversprays or rebound which gunite produces.
Requires a lot of equipment maintenance.
Production rates are lower than shotcrete.
Application of Shotcrete:-
Remember that shotcrete means a wet concrete mix that you’re working with. For thorough mixed concrete, you begin with the wet mix process. A cement truck delivers the wet concrete. To shoot the concrete, shotcrete uses compressed air through a hose just like the gunite dry-mix process. The spray at such a high-speed bonds out the concrete to itself, where it is applied.
Advantages of Shotcrete:-
As the concrete comes already mixed, the crew doesn’t have to be skilled.
The process of shotcrete is faster than gunite.
Production rates are higher.
Don’t need to add water.
Less equipment required.
It’s easy in most places to get the materials.
To add specialized admixture to the concrete is easier.
Disadvantages of Shotcrete:-
It could be tough to clear and can be dangerous for the property and crew if the hose gets clogged.
The hoses can be more challenging for the crew to use as they are heavy.
The application can’t be started or stopped otherwise you’ll create weak points in the concrete.
The bottom line:-
Ultimately by spraying cement on the walls and floor of your pool both gunite and shotcrete work. The difference is that you add the water to dry concrete as you spray gunite, and shotcrete or wet concrete needs no extra water.
Both gunite and shotcrete as the bottom line have their advantages and disadvantages. The truth is if you do the process correctly, both will produce durable, watertight, and a high-quality swimming pool. It all comes down to really what your builder prefers.