texascavers Digest of: get.8642
Topics (messages 8642 through 8642):
Re: breaking rock with Dexpan
8642 by: Minton, Mark
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Date: Thu, 31 Jul 2008 13:34:42 -0500
From: "Charles Goldsmith" <wo...@justfamily.org>
To: texascavers-get.8...@texascavers.com
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--- Begin Message ---
John,
>We're evaluating a non-explosive, rock splitting compound for use on trail
>construction and other areas where removal of rock or concrete is needed. It's
>poured wet into the drill hole and expands as it dries. Any of you diggers
>have experience with a product trade-named Dexpan? Are there other products
>which are better.
I've never used these expanding clay compounds, but there are at least a
couple of different brands available. I looked into it a few years ago as an
alternative to bang for caving. Trouble is, you need quite a large hole, like
1.5 - 2 inches in diameter. That's beyond the power available for in-cave
drilling. The other problem is that it takes several hours or overnight for
the stuff to work. Again, not practical for a caving trip. However these
constraints may not be an issue for you on the surface. Advantages are no
fumes and very little shrapnel. Here's a web site with other alternatives to
bang: http://www.rockremoval.com/. I've used the first item, Micro-Blaster,
and it's pretty effective although pricey. I've also used the last item,
feathers and wedges. Ancient technology but remarkably effective.
Mark Minton
--- End Message ---
