You may want to look into expansive grout. There are many
formulations. This is used for demolition at hospitals and other
places where the dust and noise of conventional methods is not
acceptable. Here are a few:
http://www.daighcompany.com/company.asp
http://www.archerusa.com/Product_Dexpan_En1.html
http://www.new-technologies.org/ECT/Civil/soundche.htm

(top posted for your convenience)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Keep the whole world singing . . . .
DanG (remove the sevens)




"MF" wrote in message
...
Not a marital aid, and not explicitly home repair, I'm looking
for a quarry workers tool.
I need to break up a large irregular chunk of concrete (maybe
4x5x2 ft) and I saw a technique on TOH some years ago for
splitting granite - called (I think) plug and feather.

It involves a line of holes drilled, and a series of devices
hammered into each, simultaneously. the devices, a pair of L
shaped 'feathers' surrounding a tapered steel 'plug'

Anyone ever heard of a source for these devices?

The concrete is probably very hard, having cured at the water's
edge, semi-submerged.

Any source - or better idea - would be MOST appreciated.

Many TIA.

MF