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  • Results 1 to 18 of 18

    Thread: Old concrete repairs - mystery substance and best repair methods

    1. #1
      LoriP is offline Supporting Member
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      Old concrete repairs - mystery substance and best repair methods

      20 some years worth of previous owners (several) repairs. Everything from hairline cracks to all the way through to the underlying sand and pea gravel. Mish mash of methods, etc. Spalling in several areas and old layers of delaminating thoroseal (original owner identified that for me)

      I need advice on identifying the dark brown mystery substance behind what appears to be Hydraulic cement patches. Acetone isn't touching it. It feels sort of like old dried up caulk. A little rubbery and tacky. Where it's thick enough or still adhered to the patch I can peel it off but the sloppy bits and thin layers are not budging.

      I've been power washing, stone chiseling and wire brushing trying to get off all the old patches and start with a clean slate.

      Any advice as to best approaches would be appreciated. My head is spinning.. Remove old patches and repair with what product... So many to choose from... Resurface the entire thing.... Parge? Ugh.

      Pics to follow. Thank you.
      Attached Images Attached Images  

    2. #2
      LoriP is offline Supporting Member
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    3. #3
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    4. #4
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    5. #5
      LoriP is offline Supporting Member
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      This one is along the bottom and basically runs the whole way from side to side. My guess is this one happened early on. The bowl is half on undisturbed grade and the other half would have been fill. The whole thing is built into a hill side and this is right where it transitions from existing grade to the downhill slope where the retaining wall was built with backfill. Base of the wall at the deep end is about 10 to 12 feet wide sloping up to about 3 or 4 ft wide at the top. I don't expect any further settlement after 20 some years

      Most of the spalled areas are on the bottom which appear to be from tree roots. One owner apparently didn't want to deal with it and dropped in a liner and underlay then left the old drain cleanout open. The bottom was covered in tamarisk roots that had come up through the pipe and penetrated the concrete surface as well as the underlayment fabric

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      Last edited by LoriP; 06-11-2018 at 02:59 PM.

    6. #6
      wingrider is offline Senior Member
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      That looks like something that would just be chasing one drama after another and almost unsolvable unless you perhaps sprayed something thick on the whole thing?

      Cut your losses and do a liner?
      Last edited by wingrider; 06-11-2018 at 05:40 PM.

    7. #7
      Russell Peters's Avatar
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      Polyurea would fix it
      people like to vehemently defend their purchases and find it incredulous that anything could be better

    8. #8
      Zac Penn is offline Supporting Member
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      I agree with Russell in that Polyurea is just about the only thing that will save this pond. The only other option I can think of would be to fiberglass over the concrete to form a solid liner and the concrete becomes the strength. Fiberglass would be your cheaper DIY solution if you know what you are doing, but Polyurea from a good sprayer would be the fastest repair option.
      Zac Penn.... Please sign-up for our MAILING LIST HERE
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    9. #9
      LoriP is offline Supporting Member
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      Thank you all for weighing in

    10. #10
      dalevel47 is offline Junior Member
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      Thanks for sharing.

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      reefvet is offline Junior Member
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      Resurrecting this thread as I have just, as my friend says... purchased a koi pond that comes with a house. I am curious how this turned out if you are still around and what product you used that was successful. I actually don't move in for a while, but will be getting photos for advice in the next month.
      Just wondering if there is an update?

    12. #12
      Fishmover is offline Supporting Member
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      Quote Originally Posted by reefvet View Post
      Resurrecting this thread as I have just, as my friend says... purchased a koi pond that comes with a house. I am curious how this turned out if you are still around and what product you used that was successful. I actually don't move in for a while, but will be getting photos for advice in the next month.
      Just wondering if there is an update?
      Welcome to the Forum. No clue if there is an update. Seeing that you are in Illinois, I think there is a fair chance that you have a liner pond done by an aquascape contractor (Just a hunch)
      Also, There is a fairly active Koi group in Illinois called Midwest Pond and Koi Society MPKS.org

    13. #13
      coolwon is online now Senior Member
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      You cannot make a silk purse out of sows ear,

      Garfield
      Find more about Weather in Durban, ZA

    14. #14
      LoriP is offline Supporting Member
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      Yes I am still around and I did successfully repair this pond and make a "silk purse out of a sows ear". It took a whole summer....

      I used all sanitred products. I knocked out all the old patches and repairs then went back with LRB, using various viscosity formulas depending on whether I was repairing cracks or spalls.

      Pond is a couple years on and doing fine.

      I would post repair and current photos but it keeps telling me I have to log in. I'm obviously logged in or I couldn't reply so....
      Last edited by LoriP; 1 Week Ago at 12:04 PM.

    15. #15
      icu2's Avatar
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      Quote Originally Posted by LoriP View Post
      I would post repair and current photos but it keeps telling me I have to log in. I'm obviously logged in or I couldn't reply so....
      Lori, try now and see if you can post pictures... I found a setting on your username that might have been causing it.
      --Steve


      Control your own destiny or someone else will.

      ---Jack Welch

    16. #16
      LoriP is offline Supporting Member
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      Thank you for trying to fix it. Logged out and back in, same issue. Tells me no permission and to log in.

    17. #17
      icu2's Avatar
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      Do you happen to have another browser you could log into Koiphen with?
      Sounds like the browser has stored info that it needs to flush. Or you can
      email them to me and I'd be happy to post them... forum@koiphen.com
      --Steve


      Control your own destiny or someone else will.

      ---Jack Welch

    18. #18
      LoriP is offline Supporting Member
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      Looks like a different browser worked. Thank you!


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      Last edited by LoriP; 1 Week Ago at 12:49 AM.

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