Chemical (acid?) to soften a niche or concrete so hard to break?
dalton asked:
I’ve seen a round concrete with more or less 4 meters in diameter and about 18 inches thick broken into 3 from a foot of a mountain. Visible from one piece are 7 empty casts probably from gold bars and 2 empty cast contained probably metal box measuring 6 x 6 x 12 inches. We thought a chemical was used to break the concrete.
Now, a friend found a niche down a river. It appeared after an erosion due to a flood. It’s so hard to break. Anyone here knows what kind of chem is that used to soften concrete?
Iron Metal Casting
I’ve seen a round concrete with more or less 4 meters in diameter and about 18 inches thick broken into 3 from a foot of a mountain. Visible from one piece are 7 empty casts probably from gold bars and 2 empty cast contained probably metal box measuring 6 x 6 x 12 inches. We thought a chemical was used to break the concrete.
Now, a friend found a niche down a river. It appeared after an erosion due to a flood. It’s so hard to break. Anyone here knows what kind of chem is that used to soften concrete?
Iron Metal Casting
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Tags: One Response to “Chemical (acid?) to soften a niche or concrete so hard to break?”
No chemicals that I know will just soften concrete that has been set.
Muriatic acid (Hydrochloric acid) will etch or slowly dissolve concrete, but the process takes a very long time.
In locations with cold winter temperatures, most concrete is cracked by pouring water into existing cracks and allowing these to freeze.