[TowerTalk] Jackhammer removal of tower base difficulty?

[K8RI]

On 11/2/2011 10:30 PM, Charlie Gallo wrote:
> On 11/2/2011 Rick Karlquist wrote:
>
> ...snip...
>
>> In all three cases, the technique used was to get a
>> very low paid person to spend an entire day with a cheap
>> electric jack hammer and shave little pieces off of the
>> concrete.  Very labor intensive.
> ...snip...
>
> One way that works well believe it or not are the "chemical demolition" compounds (if I remember right, they are basically bentonite clay)
It is and it's very common.
> - one trade name is dexpan
>
> You drill a series of holes, put the chemicals in, add water, and wait, a few hours later, you come back to find cracked concrete - the issue is of course the rebar, which can complicate things

If done along the rebar the concrete will come right off.

73

Roger (K8RI)