Self binding gravel terrace - How do you make it rock hard

[g00se123]

I am creating a 50m2 outdoor terrace for foot traffic tables and chairs. I was thinking of using the Cedec or super cedec for its redish colour laid on 150mm depth of 40mm scalpings. The Cedec supplier recommended against it as the chair legs may sink into the surface when wet.
Is there a self binding aggregate that goes rock solid when compacted? or could you add lime to permanently stabilise aggregate surface?

[Dave_L]

"How do you make it rock hard?"

You can buy lil' blue pills for that (so I hear)