Gunite is primarily used in building what?

Gunite is primarily used in the construction of swimming pools due to its unique properties and benefits. This material, which is a type of sprayed concrete, is applied pneumatically, allowing for a highly customizable and durable structure. When building swimming pools, gunite can form intricate shapes and designs that are not easily achievable with traditional poured concrete methods. Its ability to adhere well to various surfaces and withstand pressure makes it ideal for pool applications, as it can effectively handle the water pressure and any ground movement.

In contrast, while gunite may also be used in some of the other structures listed, it is not the primary material for footings, slabs, or retaining walls where other types of concrete mixes might be more commonly employed for structural integrity and cost-effectiveness. The use of gunite in swimming pools highlights its versatility and strength, affirming its position as the go-to material for this specific application.