We are considering constructing a Pétanque court in our office.
The typical finished playing surface is sand, gravel, small pebbles or sometimes shell.
We need a dust-free material so that when people step in and out of the court, they don't track dust around the office.
The material will be challenged by metal boules that are lobbed around the surface as part of the game, and players walking around the surface.
What are some alternative materials (or coated materials) that have similar properties to sand or gravel, but that are dust-free?