I'm not saying this would happen to anybody else, but...
We have an asphalt-over-asphalt drive. No idea when either layer
was put down; the house is 62 years old and we've owned it for
Last fall we prepared to seal our driveway. Himself was power-
He knows what he's doing, and it was going along quite well. He
got to the end of the driveway, right where it joins the apron that
was installed by the county when they paved our road about 15 years
ago. The surface there was mightily cracked, although it didn't look
much different from other cracked areas. When he hit it with the
water, there was a great volcano of water and broken asphalt, a
couple of feet high and about 3-4 feet square.
Until then, we'd had no idea that we had two layers of asphalt. It's
a little hard to tell how that top layer was applied, but it doesn't
to have bonded to the bottom layer at all. I hope modern methods are
Now, for all I know, the bottom layer could be 30 years old and the
layer could be 20 years old. Or vice versa.
We bought a boatload of cold patch and a plate compactor. It looks
pretty good, but I'm saving up for a new driveway.
On Mon, 26 Apr 2010 07:54:17 -0700 (PDT), Cindy Hamilton
But if you couldn't even tell you had two layers, doesn't that mean
the second layer was pretty good? Maybe it doesn't have to bond if
gravity holds in place. I know I'm not bonded to my bed, but I still
seem to stick there pretty well.
If water got in between you and your bed and froze, you'd be out of
there pretty quick too. If the top layer does not bond to the bottom,
water gets between and freezes (at least up here) and then you KNOW it
was 2 layers. Happens on the highways a lot if the crews don't get the
cracks sealed up tight well before freeze-up.
On Mon, 26 Apr 2010 23:33:52 -0400, firstname.lastname@example.org wrote:
This may well be true sometimes, but in the case Cindy brought, she'd
lived there for 10 years and the top layer was an unknown time longer
than that. If what you talk about had happened, she would have
already known that there were two layers, right?
Perhaps you are using bonded differently from how she used it.
No, we're using it the same way. Gravity was doing a fair job of
the top layer down until we hit it with a power washer. I'm pretty
sure that if we started power washing between you and your bed,
you'd rise up, too.
It's the difference between having a problem and knowing about it,
and having a problem and not knowing about it. Oh, we knew
some areas had trouble, but it wasn't "in our faces". The thing
is still eminently drivable, and the snow blower (paddle type)
didn't have any trouble last winter. But replacing it is still on
our radar for the future.
On Sat, 24 Apr 2010 19:35:34 -0700 (PDT), "hr(bob) email@example.com"
Ive noticed on some highway jobs they take up the old asphalt and melt
it right back on the highway. I suppose it gets more asphalt added to
it. After all, all its made of is asphalt (tar) mixed with stones.
This seems like a great idea. We have enough trash to dump in
landfills as it is.
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