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Making concrete last as loading area.

Discussion in 'General Industry Questions' started by Desertwheeler, Feb 13, 2018.

  1. Desertwheeler

    Desertwheeler Senior Member

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    We are trying to see if there is a way to help our slab loading areas survive. We have waste piles that are stockpiled on slabs and loaded with large loaders with teeth. When I say large I’m talking letourneau 1350’s and bigger. The piles are very wet and often mud so just raising the bucket off the ground isn’t an option either. Smooth buckets isn’t really an option. So we have considered rails but afraid the concrete will crumble away between the rails and a tooth catch a rail. Any ideas?
     
  2. Bls repair

    Bls repair Senior Member

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    How thick is concrete
     
  3. Tradesman

    Tradesman Senior Member

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    How about embedding I beams in the concrete at maybe 3 ft. centres in the direction of the bucket travel and welding a grid of rebar to the beams then pouring a high strength fibre embedded concrete between the beams. I've never done it just spit balling
     
  4. repowerguy

    repowerguy Senior Member

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    Consult your local r-mix plant and tell them your needs. They or their consulting engineer should be able to design a concrete jmf to suit your needs.
    What I have seen is you will likely need a microsilica mix with a good bit of steel fiber, be warned, it will be expensive!
     
    Delmer likes this.
  5. Desertwheeler

    Desertwheeler Senior Member

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    So the problem we have is that the teeth are chewing up the concrete. I’m not entirely sure on thickness but probably at least a foot. We keep getting holes in it and rebar popping up and puncturing tires. At $50k per tire it isn’t good. We usually can repair the concrete in a decent time frame or cut the rebar out if it’s accessible.
    In one Loading area running parallel isn’t an issue but the other there is not a set way the loader goes in. The slab is angled two directions which makes it hard to load when you slide around.
     
    Last edited: Feb 14, 2018
  6. Bls repair

    Bls repair Senior Member

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    Agree with repowerguy.
    Could try steel plates anchored into concrete with welded joints.very expensive
     
  7. Desertwheeler

    Desertwheeler Senior Member

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    Is rebar still needed with that steel fiber?
    It would have to be very thick steel other wise I think the loader could peel it up like tinfoil. I wonder how it would last is a very corrosive environment?
     
  8. Tones

    Tones Senior Member

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    What about a slipper plate that covers the bucket teeth? It could be made so it pins on.
     
  9. Bls repair

    Bls repair Senior Member

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    Yes it would have to be thick with joints welded to keep plates from popping.
     
  10. ol'stonebreaker

    ol'stonebreaker Senior Member

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    Pretty crazy to me to have that large a loader with teeth working on concrete. Be better to just stockpile on natural ground and teach loader hands to maintain a floor of the material they're loading. That's how it's done when handling chips/seal coat and asphalt rock.
    Mike
     
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  11. Desertwheeler

    Desertwheeler Senior Member

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    In this case the material is a clay mud and fine waste material with lots of moisture from a wet process plant and not permitted to stockpile on dirt. Other wise I agree completely about just having a good loader hand. This stuff is nasty it doesn’t even stack really at all.
     
  12. Desertwheeler

    Desertwheeler Senior Member

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    I was told we have tried that in the past and it did not work well. It made the bucket to heavy and never fit well.
     
  13. Birken Vogt

    Birken Vogt Charter Member

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    Figure the net present value of the regular rebuilds of the existing style pad into the future (and associated costs such as tires) vs. the upfront cost of the beefed up pad plus uncertainty factor such as if it gets torn up faster than you budgeted for.

    I know I am not using the right financial terms for these things but you get the gist, if you are doing work with these size tractors you probably know about NPV and such and how to value upfront vs. future costs.
     
  14. Backcountrybackhoe

    Backcountrybackhoe Member

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    And why do you need teeth And not just a cutting edge ?
     
  15. Desertwheeler

    Desertwheeler Senior Member

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    It’s only job isn’t loading waste. It has to load stockpiles and dig in digfaces as a backup machine.
     
  16. Backcountrybackhoe

    Backcountrybackhoe Member

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    Does it have a hydrolic quick change on it? Could you get a 2nd bucket with a cutting edge
     
  17. Desertwheeler

    Desertwheeler Senior Member

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    I don’t know that they make them that big. Bucket has a capacity of 40 tons.
     
  18. John Shipp

    John Shipp Senior Member

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    A slightly lighter one that fits better?
     
  19. DMiller

    DMiller Senior Member

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    Worked in a garage where the concrete had steel filings and iron dust mixed into the batches. Took a diamond blade or drill bit to cut it after hardened, had a dark grey color once dried and would develop a rust sheen if left wet for long periods. We ran crawlers on these floors with minimal grouser damage but when came time to replace due to age was major SOB to remove the slabs.
     
  20. Labparamour

    Labparamour Senior Member

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    I’m guessing you need to contain the run-off/leached liquids of material being stockpiled.
    Could you have soil pad with membrane liner underneath to contain liquids?
    I know around here, that’s how they construct landfills and manure lagoons.
    Then, do as others have suggested: keep thin layer of material to run bucket over.

    Darryl