Concrete damage-Why?

[bill_activist]

In the backyard of a friends house, the concrete is disintegrating a little , on the top. It's in Reno, there has been some snow and below freezing wea ther in the past month. They've only lived there 2 years, the concrete was fine last year. They don't shovel the snow off this, but I don't think that 's needed.

Any idea why the surface of concrete would get damaged? And what a person could do about it? So it doesn't get worse?

Here are 2 pictures:

Thank you, Bill

[gfretwell]

That can happen in real hot weather too. Spalling is a separation of the top layer from the base material and it is a curing problem most of the time. You need to cover the concrete and keep it wet for up to a week if you want to avoid this. If the surface "dries" before it "cures" there will be a layer that is just waiting for some small trauma to spall it off.

[Tekkie®]

[e-mail] posted for all of us...

+1 Can't just plop it down and walk away...

I didn't look at the pix but I wonder if a leveling agent would work?