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Thread: Hard Core - How well do you know yours?

  1. #1
    spoons
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    Default Hard Core - How well do you know yours?

    Some help please on hard core....

    Following this thread....

    http://www.vectra-c.com/forum/showth...light=driveway

    My house went from this...





    To this...



    I'm having a concrete driveway laid, but was wondering if they have used the right rubble?

    It was compacted this afternoon... what do you think?

    Does it look the right sort of stuff to hold 4-5 inches of concrete?






  2. #2
    Regular Member elongmoss's Avatar
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    how deep have they laid it when i had mine done 6-8 inches of hardcore was required to prevent it sagging where the cars usually sit overnight otherwise as long as its 1" or larger should be fine
    hope this helps

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    Moderator & Events Assistant paulhb's Avatar
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    If its 4" deep compacted then it will be fine mate its going nowhere just hope your drains don't need looking at as it will leave a nasty scare digging it up!

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    Regular Member markm's Avatar
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    Looks like a mix of MOT1 subbase, "scalping" and larger hardcore mixed in,

    I used just the MOT1 (about 4") subbase under 2" tarmac and its fine under the weight of the Vectra.

    should be even better with a layer of concrete on top,

  5. #5
    spoons
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    Quote Originally Posted by elongmoss View Post
    how deep have they laid it when i had mine done 6-8 inches of hardcore was required to prevent it sagging where the cars usually sit overnight otherwise as long as its 1" or larger should be fine
    hope this helps
    Well, where the driveway was originally they dug up the tarmac and got rid of that, then ruffled up the existing hardcore that was already there and spread it about. I measured that area to be about 5-6 inches

    They dug up the turfed area and left about 2-3 inches deep, but with room for about 4-5 inches of concrete to go on top to bring it level

    I didnt measure how deep it was once they had compacted it

  6. #6
    spoons
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    Quote Originally Posted by markm View Post
    Looks like a mix of MOT1 subbase, "scalping" and larger hardcore mixed in,
    The builder lad told me they use recycled hardcore from the quarry? but its good enough for this sort of stuff?

    No idea ?

  7. #7
    Regular Member byebyeitsagsi's Avatar
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    We deliver loads of type 1 to people who are laying driveways and roads. Thats what people use to save money its called crusher run.

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    Regular Member BIG-G's Avatar
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    what did they use to whack it down with was it a whacker plate or was it a roller.if they used a whacker plate it will not compact it enough and you will get subsidence

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    VIP-Member Johnsdutton's Avatar
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    Quote Originally Posted by vectra vxr View Post
    what did they use to whack it down with was it a whacker plate or was it a roller.if they used a whacker plate it will not compact it enough and you will get subsidence

    Not necesarily true. I did mine 20 years ago and used a wacker plate, went over it half a dozen times, no problems with subsidence. If they have only gone over it once or twice with a wacker plate you could have problems. If you are having 5-6 inches of concrete on top and only using it for domestic vehicles there should not be any problems.
    3.2 v6 Signum and loving it

    http://www.freewebs.com/johnsdutton/

  10. #10
    spoons
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    Quote Originally Posted by vectra vxr View Post
    what did they use to whack it down with was it a whacker plate or was it a roller.if they used a whacker plate it will not compact it enough and you will get subsidence
    Quote Originally Posted by Johnsdutton View Post
    Not necesarily true. I did mine 20 years ago and used a wacker plate, went over it half a dozen times, no problems with subsidence. If they have only gone over it once or twice with a wacker plate you could have problems. If you are having 5-6 inches of concrete on top and only using it for domestic vehicles there should not be any problems.
    I wasnt around when they compacted it so didnt see. I think they used a wacker plate machine, as I'm sure he referred to it during the morning.

    There will be 4-5 inches of concrete on top and needs to hold my Vectra and the Fiat 500...

    I've looked at other driveways they've done and there isnt any subsidence on the other drives, 3 years on...

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