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Breaking up a small slab - will this work?

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  1. #1
    Apprentice (new member)
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    Default Breaking up a small slab - will this work?

    G'day all.

    I've got a small concrete slab that I most likely need to get rid of. It was under a garden shed. It's 3m x 3m x 100mm and I'm pretty sure it's reinforced.
    I'm wondering what the options are for getting breaking it up?
    The easy one is to go and hire a breaker but I suspect I'm like a lot of people here and would probably rather spend the money on a new tool that I can keep if it's a realistic alternative - read not too dear and will do the job.
    The option I'm considering is to use a SDS Rotary Hammer Drill like the Ozito one that people have raved about here a bit. I don't expect it to jackhammer its way through the slab like a real breaker, but how about using it to drill a series of holes and then perhaps a combination of sledgehammer and the SDS in Hammer/Chisel mode?
    Another option I guess is to get a large angle grinder and a diamond blade and cut it up? Anyone had experience or got views on how well that would work?

    The best part about this job is that I'm removing it to make way for a real shed - almost. 6m x 3.5m with an open 3m x 2.5m annexe on the side. So it will be a job I'll be happy to do!

    Thanks

    WoodJam

  2. #2
    1K Club Member autogenous's Avatar
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    Default

    Reinforced 100mm is truck ready. Have you a very very big sledge hammer?

    Ideally cut with diamond saw then break rest up with Bobcat.

    I think the smaller rotary hammer may lose its hammer by the time its finished.
    https://www.instagram.com/perth_bricklayer_wa

  3. #3
    rob
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    Default

    i would hire a jack hammer for half a day i did the slab in my laundry that was the same size in about two hour and then return the hammer and went back to remove all the rubble . i have an ozito hammer drill and it will not brake up the slab if it is about 10cm thick as you said .

    regards
    rob

  4. #4
    Idon'tturnpens
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    Default Diamond (wet cutting) Saw!

    Mate, I would definately go the diamond concrete (wet cutting) saw approach! Hire from Kennards or other hire mobs and use sledge hammer to persuade the difficult bits.......... what helps here is think of the human credit card shopping!


  5. #5
    Member
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    Default

    I had to do the same about a year ago. Ended up buying an industrial type hitachi jack hammer from eBay, was around $200 - $250 from memory. Didn't see the point in hiring because i'm sure i'd have a use for it in the future again.

  6. #6
    Apprentice (new member)
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    Default

    Thanks for the advice guys.
    Looks like I'll be off to the hire shop.
    That's a good pickup Com_VC. I guess you never say never, but I really don't think I could justify buying a breaker so I'll hire something to do the job instead.

  7. #7
    Golden Member
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    Default

    As someone who has broken concrete with reinforcing the hard way, and the (bit) easier way, hire a demo saw from Kennards or someone local and cheaper. An hour of noise and mud will have the bloody slab cut into bits you can handle - and DO cut it into bits you can lift - then lever the bits out with a pinch bar.

    I'll bet part of the slab is 100mm, part is 75mm, and part (worse!) is 150mm. Hard to smash up.

    Just my two bobs' worth!

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