What is the suitable slump range for wet-mix shotcrete that can generally be handled by a pump?

The suitable slump range for wet-mix shotcrete that can generally be handled by a pump is indeed between 1 1/2 to 3 inches. This range is optimal because it ensures that the shotcrete has sufficient fluidity for pumping through hoses and nozzles while maintaining the necessary workability to form strong bonds during application.

A slump too low could lead to difficulties in pumping and preventing the mixing from flowing smoothly, which might result in blockages or increased wear on pumping equipment. Conversely, a slump that is too high could lead to issues like segregation of the materials, which can weaken the final structure.

This specific range balances the need for workability with the mechanical requirements of the pumping equipment, making it the most practical choice for wet-mix shotcrete applications in commercial pools and other construction purposes.