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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/28/2005 1:44:33 PM EDT
Link Posted: 8/28/2005 1:47:30 PM EDT
Link Posted: 8/28/2005 1:51:05 PM EDT
Yes, mostly if it is exposed to freeze/thaw cycle tho. It will spall concrete but if you hose it off after a while it will be fine.
Link Posted: 8/28/2005 1:51:48 PM EDT
If it did then there's a LOT of bridges that are in big trouble.

Of course, that might be a slightly different type of concrete.
Link Posted: 8/28/2005 2:29:20 PM EDT

Originally Posted By operatorerror:
If it did then there's a LOT of bridges that are in big trouble.

Of course, that might be a slightly different type of concrete.



Why do you think we have such crappy roads in Michigan? Lots of salt in the winter dumped, a freeze/thaw cycle, and rusting rerod from salt penetration swelling. [It can and does rust gas lines [[bare steel]] that are 4 foot + deep at the kerbline.
Link Posted: 8/28/2005 3:04:20 PM EDT
fxntime got it right. It's not salt that hurts concrete, it's the freeze-thaw cycles that blow concrete apart.
Concrete is porous and soaks up water in small "bubbles" in the concrete. When it gets cold enough to freeze, the small voids full of water expand and break the concrete little by little.
Eventually, the cracks get to the reinforcing steel which then rusts and also expands, further breaking the concrete matrix.
The whole deterioration process snowballs.
Link Posted: 8/28/2005 3:06:52 PM EDT
.
Link Posted: 8/28/2005 3:08:19 PM EDT
Good question, I know Rock salt is hell on Concrete sidewalks in the winter time!
Link Posted: 8/28/2005 3:08:54 PM EDT
Good question, I know Rock salt is hell on Concrete sidewalks in the winter time!
Link Posted: 8/28/2005 3:15:17 PM EDT

Originally Posted By Fireguy3:
Good question, I know Rock salt is hell on Concrete sidewalks in the winter time!



And lawns, as I found out last winter.
Link Posted: 8/28/2005 3:42:01 PM EDT
Yes, saltwater will hurt concrete. You have to wash it off with freshwater.
Link Posted: 8/28/2005 3:45:18 PM EDT
Saltwater hurts concrete, yes. But salt does not directly harm the concrete. It gets into the concrete and rusts the rebar inside. Then you have problems. I saw it a lot at boat ramps and piers.
Link Posted: 8/28/2005 9:39:47 PM EDT

Originally Posted By fxntime:

Originally Posted By operatorerror:
If it did then there's a LOT of bridges that are in big trouble.

Of course, that might be a slightly different type of concrete.



Why do you think we have such crappy roads in Michigan? Lots of salt in the winter dumped, a freeze/thaw cycle, and rusting rerod from salt penetration swelling. [It can and does rust gas lines [[bare steel]] that are 4 foot + deep at the kerbline.



What is this freezing and thawing of which you speak?
Link Posted: 8/29/2005 12:47:15 AM EDT

Originally Posted By fxntime:
Why do you think we have such crappy roads in Michigan?



Not that the winters help our roads, but the weight limit on trucks in MI is the highest in the US, IIRC.
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