cracking rock with expanding cement

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cracking rock with expanding cement

Postby razldazl69 » Tue Feb 03, 2015 1:51 pm

Has anyone had any experience with cracking large rocks using a special "expanding cement" made for this (Calcium Carbonate). I am thinking of drilling 1 inch or 1 1/8 in holes and then filling them up in a gridlike pattern?
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Re: cracking rock with expanding cement

Postby Roger Ramjet » Tue Feb 03, 2015 3:33 pm

razldazl69 wrote:Has anyone had any experience with cracking large rocks using a special "expanding cement" made for this (Calcium Carbonate). I am thinking of drilling 1 inch or 1 1/8 in holes and then filling them up in a gridlike pattern?

I have experience with cracking rocks, it depends on the type of rock first off, what you want to achieve, how big a crack you wish to put in the rock, for what purpose.
There are a number of know methods, but again it depends on the type of rock and what you want to achieve.
You can also "pop" rocks, but again refer to the above. Need more details, different rocks have different strengths. E.G. You can't crack shale.
The use of calcium carbonate can be dangerous in confined spaces. If you wish to find out how dangerous just get a small tin with a lid on it. Punch a small hole in the lid. Fill the tin half full of water, add a very small amount of calcium carbonate, put the lid back on and pass a naked flame over the hole in the lid. Make sure your hand is nowhere near the lid.
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Re: cracking rock with expanding cement

Postby cooked » Thu Feb 19, 2015 8:29 am

The Japanese sell a special product in Switzerland, described as a 'slow explosive'. You need a special license for this stuff as it would be a good way of slowly and noiselessly breaking into banks and stuff. You also have to do a course.
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