Last time I asked a question I got a lot of really good advice. Here’s hoping it will work again.
I have found a large 3x3x3 foot (approx) concrete blob buried in my yard (maybe we’ll find Jimmy Hoffa in this thing). I think someone didn’t know what to do with excess concrete so they just dug a hole and filled it. I need to get it out so I dug around it but it’s just too heavy a set in place. I was thinking of using a jack hammer but the guy at the rental yard said it it would be ineffective. Some else there said I shoud use a product that you place in a hole dilled in the blob. He said it expands and breaks it in to smaller pieces. Does this sound faliliar to any of you?
Thanks in advance for your help.
TonyMan
Replies
http://www.archerusa.com/Product_Dexpan_En1.html
Works great.
Ditto what catskinner said.
Well, someone had an extra yard on a pour and left a big turd for ya'. They should have just sent it back. I went by the batch plant I use a while back and they had bought a big load of metal forms for concrete highway dividers, and were using excess mud to make them.
3 x 3 x 3 - that is one yard of concrete with a weight of 2000 lbs +. A compressor run heavy duty jack hammer would break it up. The expanding stuff sounds interesting, but I have no experience. If you try it post the results.
1 yard of concrete weighs 3150 pounds IIRC.
you could use a sledge to break it up as well. not that big of a deal... jack hammer should have no prob... even an electric one (the big stand-up kind). It is safe to assume that the concrete is not reinforced.
The difference between stupidity and genius is that genius has its limits. -Albert Einstein
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I stand corrected, but I did put 2000 lbs +. An electric would work...but much slower.
Build a good hot fire over it, one that will burn for several hours.
Where is this, and how long do you have to do the job? If you're in a freezing climate, just drill the holes, wait for winter, and fill them with water. ;-)
Seriously, though, tell us where this is. Is there access for a backhoe or bobcat? Perhaps there's somebody on Breaktime nearby who'd have the equipment to make this an easy job.
-- J.S.
I have a bosch electric Brute. I could break it up in twenty minutes or less
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A bobcat with hammer attachment would make short work of it.
mk