A free draining aggregate foundation is essential to prevent water logging directly beneth the self binding gravel, this foundation stone should be roller compacted with a roller of approx 1000kg or more.

Use a broad headed rake or similar to lay the self binding gravel to the required depth (50mm for pedestrian use or 100mm for vehicular use).

The levelled surface should then be dry rolled with a vibrating roller to its fullest compaction until it forms a smooth and uniform surface.  (any patchy areas can be filled with fines from any surplus material and rerolled.

Now that you have a smooth and consistent surface, it is time to begin the second rolling phase.  The rollers vibrator should be switched OFF for this stage.  Wet rolling will float the fines ups to the surface of the gravel , this ensures the gravel binds and sets properly. Water should NOT be applied to the gravel surface but should be sprinkled onto the roller surface only.  Continue wet rolling until a smooth and even surface is achieved and allow this surface to set and dry for a minimum of 48 ours before use.