Laying on sandy soil

All forms of block paving, brick paving, flexible or rigid, concrete or clays, new construction or renovation
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handywork
Posts: 5
Joined: Wed Mar 02, 2005 7:36 am
Location: West Sussex

Post: # 21954Post handywork

We are just installing a 70m drive and need to find what you guys think about this....

We have excavated the old concrete drive, and it appears the house has been built on what was an old sand quarry. The surface is therefore what can only be described as a sand/brickdust surface around 2 feet deep. It appears to be quite firm to walk on and I need to know whether you think 6 inches of MOt Type 1 will be good enough as a sub-base, or, infact, if we even need to put doen more than 100mm sub-base anyway

Thanks

Dave
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lutonlagerlout
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Location: bedfordshire

Post: # 21970Post lutonlagerlout

sand is normally a good base for drives as it is fairly non plastic,
are you putting kerbs in?
LLL
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handywork
Posts: 5
Joined: Wed Mar 02, 2005 7:36 am
Location: West Sussex

Post: # 21977Post handywork

There are already some retaining kerbs around the edges...
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lutonlagerlout
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Post: # 21984Post lutonlagerlout

get the roller/wacker on it and see what happens
100mm of compacted type 1 is normally the minimun,but suck it and see
LLL :)
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Tony McC
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Post: # 22007Post Tony McC

Sand, sand and gravel, or gravel sub-grades usually have a high CBR, so a minimal sub-base is required. I'd never countenance using less than 100mm.
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