Finishing a shingle driveway

[d62m9t]

Hello there, new to this forum.

As we're having a lot of work done on our house, I made the most of having JCB and driver on site, and had the existing driveway excavated and re-shaped. Dug down about 200-250mm, put in about 100mm of medium hardcore, followed by a layer of 50-100mm of type 1. Used a vibrating roller to make sure it was all well-compacted, and then finally put another 50mm or so of crushed concrete, with half a dozen passes of a wacker plate.

I was hoping that the crushed concrete would bind together pretty well, so I could simply add 10mm shingle to finish the drive off.

Anyway, after a few days of moderate use (a few delivery lorries plus our cars), it looks like the crushed concrete is quite loose in places. There are a few patches of larger stones exposed, and areas of loose dusty material. Obviously, what I want to avoid is adding the finishing shingle on top of this, and then the whole lot mixing together into a big mess.

So, my questions are as follows:
1. Is it likely that shingle will mix in, or does my description sound like a reasonable base that will last for a good few years? I guess using larger shingle would help, but I'd rather stick to the smaller stuff if possible, as I think it looks better
2. Are there any straightforward ways to encourage the crushed concrete to bind a little better? One suggestion I've had is to spread a few bags of dry cement over, and then wet it with a hose (or just let it rain). Any thoughts?

Any help or suggestions much appreciated.

[DNgroundworks]

I usualy find that if the MOT is slightly damp before you pass over with the vibrating equipment it will compact a hell of alot better, also the areas of larger stone maybe try rattling some 20mm > dust over the top, if that doesnt work excavate that area and put some MOT in with plenty of fines.

The cement wont work.

What you have decribed above is fine for a shingle driveway, jus dont lay terram to seperate the layers of stone, however tempting it may seem

Regards Daniel.

[msh paving]

Top advice there DN, MSH

[d62m9t]

Thanks for the advice. We'll leave it for a month or two while other works progress, see how it's looking then before putting the shingle down.

Appreciate your help, excellent website.