Posted: Thu Jul 01, 2010 1:25 pm
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.
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.
