Originally Posted by AbbeysDad
So now you're comparing a rock in boiling water to sink holes and erosion due to flooding? Like rocks in FIRE and your boiler example, again you're comparing apples to oranges. The heat waves we've seen do not cause water to vaporize with explosive force - I'm not sure what you're thinking here my friend.
It's been done, over and over in Junior high school science classes (just like snuffing out a match by a quick dip in gasoline!). There has never been a reported case of rock explosions in an open pot of boiling water. If you can find one, I'd appreciate a link - in a pot of water now, not a fire.
Lets just agree to disagree.
My apologie's for not making understandable my thought's.
Yes,,we have sink holes and erosion of road way's close to the river where erosion has eaten away the sub base under those roads close to the river.
The heaving up of concrete and" blow up's" of same however is in my view different, and report's of this are along interstate's and city streets far removed from the low lying areas closer to the river.Street superintendent's and contractor's here and in Iowa and Oklahoma, are attributing this to moisture trapped under these areas and extreme heat and humidity.
Googling" concrete blow up's" should produce some report's of this.
I do not know whether this is a valid explanation and will leave this to Expert's either real ,,or self professed.
As stated before,, I am not certain as to what result's or danger could exist from boiling rocks but my theory is that perhaps rather than rocks exploding,that water is superheated and what is happening is sometimes called "bumping" or" Bumping boiling" .
I have seen this firsthand while heating medication "Metronidozle " which is said to be more effective at higher temps due to it being primarily used for human use and warmer body temps.
I was bringing it to a boil in microwave and condition described as "superheating occured". The mixture of water and medication, quickly began to boil and then after a couple minutes boiling ceased, and I presumed the medication which is not easily soluable in cool water was liquified.
The moment I placed a plastic spoon into the cup of liquid to give it a stir,,a violent explosion of this concoction occured for I did not let the solution cool before attempting to stir it.
Have heard of other's who have expierienced similar result's with heating cups of coffee or tea in ceramic mugs in the microwave often times resulting in nasty burns.
Perhaps rather than rock's exploding,, this "superheating" is what has happened leading some to believe the rocks have exploded or fractured, (makes more sense to me).
In any event,,as stated before I think there are much safer alternatives for preparing or sterilizing stones for use in the aquarium and would not reccomend boiling them.
Again my apologies for not being able to articulate my thought's in a manner that was more easily absorbed.
I suffer from a mild form of ADD and with meds I am sometimes able to keep up with my thought's .Other times,,usually later in the day,, these thought's are hard to corral and place them in the order I would like.
For those interested.. One can google "Superheating liquids"," Chemical reaction Bumping", or Google ..use of boiling chips and Boiling stones which I understand are sometimes used to prevent superheating condition while boiling various liquids.