Have your makeshift molds overflow!
Oops.
Have your makeshift molds overflow!
Oops.
Hey! Those bricks!
I dont know how well insulated the bottom of that is, but you probably want to move it off the concrete. Ive always heard to not torch on concrete, that it would "explode".
i didnt put much thought into it but i recall having heard that over the years from various folks.
then my buddy neighbor texted me that his fire pit just exploded. He had it on the driveway and the whole area under the pit "exploded". The bar is the flat surface of the concrete, the socked foot is in the crater. 
the crater. 
There's gotta be an easier way!
Pouring molten metal on your driveway might work for concrete drives, but I'm fairly sure it would not benefit my blacktop drive. Besides, I'd need to find a way to keep oil from dripping on my drive before I invest time in getting the stains up. An ounce of prevention being worth a pound of cure and all that.
In reply to TJL (Forum Supporter) :
I believe it's due to the moisture content, water works its way into everything. Then super heat makes it expand into steam and break out of anything it's trapped inside.
Similar to videos of people putting river rocks over a camp fire and they explode.
1988RedT2 said:There's gotta be an easier way!
Paint stripper or Ospho seem to work pretty well without the potential explodey part.
j_tso said:In reply to TJL (Forum Supporter) :
I believe it's due to the moisture content, water works its way into everything. Then super heat makes it expand into steam and break out of anything it's trapped inside.
Similar to videos of people putting river rocks over a camp fire and they explode.
Basically this, concrete in general is hydroscopic and always has moisture in it.
In reply to TJL (Forum Supporter) :
Oh yeah, concrete can 100% explode. I had this fairly well insulated, and aluminum gives up its heat fairly quickly, as well as being relatively low-heat. However we have had a drought lately and I didn't want to set my yard and the neighbor's yard on fire, so driveway it is!
Definitely better ways to do this. All of this. From one end to the other.
I still need to clean my oil spots up tho..
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