I am building a deck and one of the foundation holes I hit a large bolder that i can't budge. I tried a jackhammer for about a hour it only broke off a little piece. The rock is so hard the hammer doesn't even put a hole in it. How can I brake this rock Help!!!!!!!!
Do you have to remove it for some reason? In my area if the rock is large enough,you could drill a hole and pin it with rebar then put your sono tube on top. That way the rock is actually your frost footing. But I would check with your township building dept. to see if this is allowed in your area, which it should be. When I hit a large rock or rock ledge while digging for deck footings it makes me very happy cause it's less digging I have to do and less concrete I have to mix. And just think if that rock aint moving with a jackhammer it aint gonna move with a deck post on top of it. Natures perfect footing.
As said, I'd use that rock for the footing. The link provided above is good if the rock has exposure, need some room for expansion. All kinds of tools and products available for breaking up that rock, not sure how far you want to go with it.
Two ways. With a hammer drill, drill holes about 4" apart in a line where you wish to split the rock. Then use splitting wedges which are hammered into the stone to split it. Better way for boulders is to rent a compressor and a rock drill. Drill 1 1/4" holes about 12" apart. Fill holes with expansive grout. It expands overnight and splits the rock. I remove tons of ledge with this method.
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