The Brew Cabin

I am intending to construct a patio and have a quantity of flint chippings which I would like to incorporate into the sub-base. If I mix these with sand will this form a suitable sub-base material?

I was hoping to use this mix at the bottom and then crushed stone on top.

Mixing grit sand and flint chipping would make a reasonable sub-base-cum-fill-layer for a patio, as there's no heavy loads involved, but such a concoction wouldn't be suitable for use beneath a driveway or other pavement that was intended to carry vehicular traffic.

Thanks Tony.