Posted by Billy NY on August 23, 2011 at 15:19:56 from (74.67.3.54):
In Reply to: Concrete burn posted by JML755 on August 23, 2011 at 12:49:56:
That is a hard lesson about concrete, hopefully you will heal up and forget what knee it was on !
Concrete has Lye in it, very caustic indeed, you think that burn is bad, do some research on concrete burns, I recall seeing photos in ACI (American Concrete Institute) journals, years ago while researching a term project in college on concrete, lesion like, discolored almost like a snake venom creates necrosis, I would imagine there are photos to be found on the net somewhere.
Any portland cement based material when fresh, especially concrete, mortar, etc. probably spray on fireproofing, (portland type, not gypsum base) will burn you. Its a good idea to have a MSDS sheet on any of these materials and have a tool box safety meeting on same, that photo sends a clear message !
I can say that limited exposure of mortar to ones fingers will remove the fingerprints in short order, absolutely nothing to fool with, and I've heard all the "hoopla" by old set in their ways contractors.... naaaaaaaa wont hurt ya... guess again ! Look at a carless masons hands from years of exposure to these materials, that'll learn ya ! LOL !
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