Not sure which forum to post this on ... but I have an outcropping of
ledge in my yard that I would like to reduce in size. I'm told there is a
fluid that can be used, other than water, to pour into drilled holes and let
mother nature take over during the winter months to freeze it, and
ultimately break/split/crack the ledge that is too close to my barn to
blast. Does anybody know of what I'm talking about?
Thanks in advance,
I googled for an old post regarding an expansive agent that you pour into
holes that you drill. Couldn't find the post, but I did find the company
that makes it.
Then, scrolled further down the article and realized it wasn't an old usenet
post, but rather a Fine Homebuilding article, which is referenced in the
As long as you're already drilling the holes, why not get a set of wedges
and feathers and just split the face by hand? I found an example of the
wedges here (http://www.miconproducts.com/wedges.html ). I saw this done on
This Old House once upon a time. When this was done in the old days, the
hard part was drilling the hole. When they did it on TOH, the pro used a
pneumatic drill with a special bit that had a hole in it that compressed air
blew into. Apparently, it did a better job than just a regular stone drill.
Could be more fun than waiting for a liquid to maybe or maybe not split it
Note that this is an excellent way to give yourself a bad case of
permanent lung damage. If you use such a drill, be sure to wear
suitable protective gear.
Serious professional drills pump water down the bore, not compressed
air, an innovation the mining industry adopted after killing off the
first generation of pneumatic drill users.
Well, I'm not sure this is a serious professional type of job. And somehow,
I doubt a one-time use is likely to cause "permanent lung damage". And I'm
pretty sure this granite outcropping is outdoors, so I think my anxiety
level would be fairly low. If I were doing it, I'd probably still wear a
mask, but I don't think I'd inflate the risk to the level of someone
spending 8 - 10 hours a day in a hole.
Water, but use wooden wedges too.
If you use plain water, then the force is symmetrical and the split can
go anywhere. If you take a strong (high crush strength, like elm or
oak) timber that's well-seasoned, then make it _bone_dry_ by leaving it
on the stove for a day or two, then you do two things. Firstly you make
a more powerful force, secondly you make one you can direct. Pack the
plugs into the holes so that there's a gap on the side towards adjacent
holes. Do it right and you get a neat zipper between the holes. The
"wedges" should also be near-parallel and well-fitting in the holes,
except for a flat planed on opposing sides. I used 24mm, because it's
the biggest long drill I had without getting an expensive core bit.
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