My neighbor is having his asphalt driveway re-done. His old driveway
was full of cracks, and he assumed that the cracks were from freezing
and thawing and that probably the foundation under the asphalt was
poor or non-existent. Surprise! When they went to remove the old
asphalt, they discovered that there was a second layer of asphalt
underneath. And, it had absolutely no cracks whatsoever.
So, my question is - what would cause the top layer to crack in this
situation? Poor asphalt mix?
I am really curious.
On Jun 30, 1:13 pm, email@example.com wrote:
re: When they went to remove the old asphalt, they discovered that
there was a second layer of asphalt underneath.
So they were really removing the *new* asphalt, not the old, right?
Had the orginal driveway settled a lot, even if it hadn't cracked? Why
was there a second layer on top, if there was nothing wrong with the
This is why I SEAL my driveway every couple years, the coating seals
the cracks and keeps water from penetrating causing more cracks.
my driveway isnt brand new but thats OK since its about 25 years old
mine had a one foot deep base of a variety of rock, installed by a
company that does public roads.
it didnt crack much when young but has more as its aged.
asphalt detoriates and cracks in phoenix where it almost never
although sun does much damage there.
the next door neighbor where i grew up as a child, and I am 52:( now.
that driveway is asphalt as old as I am and still in decent shape, the
neighbor still lives there but over 80 years old he hasnt been able to
seal it recently.
tom meehan is a nice guy I will stop and visit this summer
On Tue, 30 Jun 2009 10:48:19 -0700 (PDT), DerbyDad03
A good question. The house was a model home, onto which a garage was
added after the first asphalt layer was laid - so I am told anyway.
Noone seems to know why the second layer was added except maybe it was
to make the top of the asphalt match up with the garage entrance,
which it does - if the added asphalt is there.
Anyway he had several bad cracks, and so wanted to correct that. Let
us hope that the new second layer does better.
I was just curious. It seemed odd to me.
Proper asphalt is in two layers. The bottom coating is more course than the
finish coating. It may well have been freezing on the top coat. One you
get a crack, they keep getting bigger in the freeze/thaw cycles.
On Tue, 30 Jun 2009 13:13:55 -0400, firstname.lastname@example.org wrote:
It could be that there was not enough liquid asphalt used when it was
mixed. It could be that too hard a grade of asphalt was used when it
was mixed. It could be that it was not compacted properly. Or a
combination of all those. It could also be that the quality of the
rock was not very good, some rock absorbs too much of the asphalt and
some rock just doesn't coat very well.
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