Crushed granite or crushed concrete for driveway

With crushed granite, you need to put it down in at least a 4" layer, preferably 6", and roll it in well with at least a heavy smooth drum roller but preferably a vibrating smooth drum roller. You need to keep it moist but not saturated during this rolling process. Do NOT roll it dry as this will only succeed in cracking and breaking up the layer and turning the top to powder.

When it is down hard, you then need to wet the top immediately ahead of the roller until there is actually a light slurry on the top of the rock.
Keep rolling this until it starts to dry out and then get off it altogether and let it dry by itself. This won't normally take more than 24 hours or thereabouts unless you have rain. A bit wind and sun helps too.

This process of 'slurrying' squashes all the bigger (3/4" big?) stones in to the surface of the pavement and leaves it generally pretty smooth and resistant to anything but heavy run-off. At this point, if you so desired, the road would be ready for tar sealing and stone chip topping.

With any road, sub-grade and drainage are the keys to a good job. Drainage is the protection of the road after completion and the sub-grade is the foundation which will determine if your road will or won't stand up to traffic.

The sub-grade should ideally show NO soil movement under the heaviest load that you will ever be likely to put over it, i.e. tractors, loaded trucks, heavy floats/lowboys or whatever your heart desires (Known as proof-rolling.). Don't settle for proof-rolling your road with the family car -- it just won't cut it.

You can do the same thing with recycled concrete but it is not as hard as the granite and does not usually give as good a finished product.

Roads are a lot like empty buckets -- you can only get out of them what you put into them.

Hope this helps. E-mail me if you want.

You have a wonderful day. Best wishes. Deas Plant.

To David-OR's point try to do it right to reduce your on going maintenance time and costs. I am currently rebuilding my drive now that house construction is complete. That HEAVY equipment can really tear up a road.

Below is a link that I have found useful concerning road building.
HTH

• Building access roads

You can get a nearly maintenance free surface this way. Just "tailgating" the rock onto the road doesn't work nearly as well, regardless of what material you choose.

I used to have to order 20 tons of rock every year to fill in the washouts. And the driveway was always rough. Spent the money to do it right, and haven't added rock in 6 years.

No matter what you use, you'll drag some off when you plow. Crushed concrete and crushed limestone are better than granite in that respect, because they pack down smoother. Granite tends to have a lot of sharp edges that your plow will snag.