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Re: [TowerTalk] Tower Problems

Subject: Re: [TowerTalk] Tower Problems
From: "Roger (K8RI)" <>
Date: Fri, 07 Jan 2011 18:06:31 -0500
List-post: <">>
There is a compound (discussed on here about a year or so back) for 
breaking rock or concrete.
You drill/bore a hole into the rock, then pour this epoxy like stuff  
into the hole. When it cures it expands just like water when it freezes. 
There are even videos of this stuff working...if I could only remember 
the name.  HOWEVER a quick search on "Compounds for breaking rock and 
concrete" turned up a bunch of hits.  Following are just a few.

Watch out for line wrap on the following link which is 4 lines long. It 
is an explanation of the process used in this approach.


Roger (K8RI)

On 1/7/2011 5:33 PM, Grant Saviers wrote:
> Another way to go is to split the rock with feathers (also called
> wedges).  Check with a local quarry, stonemason, or grave marker outfit
> to see if they will do it.  A series of holes is drilled along the grain
> (expertise needed to find it) and split steel cylinders are expanded
> with the feathers.   They are very hard steel with maybe a two degree
> taper.  The mason hits alternately each one in to the same ping tone and
> eventually without any fuss the rock is cleaved into pieces that a
> backhoe or backhoe with thumb can manage.  Amazingly (to me) you can buy
> "splitting feathers" on Amazon.
> Except for the hammer drill with the carbide bit to drill the holes,
> this has been done for centuries.
> There is also a technique to freeze water in a line of holes, but I've
> never done that, and it takes special refrigeration equipment.
> Of course it is much more fun to watch the local blaster play with
> dynamite, been there also,<<  500' from a building.  Is that a law for you?
> Grant KZ1W
> On 1/7/2011 9:57 AM, Mickey Baker wrote:
>> You just need the right equipment.
>> You can find someone with an excavator and rock hammer that will make short
>> work of this. The rock hammer is a hydraulic jack hammer that replaces the
>> bucket on the end of the excavator/backhoe. In your part of the country,
>> I'll be that most excavation contractors have one - you can rent one at
>> Sunbelt Rentals in San Antonio, but it will take you some time to use it
>> safely - hire a pro unless you have a lot of other holes that need digging.
>> snip
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