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>> Charlie: One reason that they have to take this asphalt off is
that according to racing rules and whether it is NASCAR or CART
or whatever, this has to be a minimum of 42 inches.
So, if it is 42 inches now, they obviously have to take something
off before they can put something back down again.
Going back to the highway situation, those of you that are
from northern Illinois, the Chicago area.
you know what the traffic is like up there, so those
interstates, they have been re-building.
You know, you look at the Dan Ryan, Congress, the Eisenhower,
the Kennedy, all of those have pretty much been rebuilt because
the traffic is absolutely phenomenal up there and you get
to a point after say twenty years or so or thirty years that
they look at it and they say we can't just go in and take off
two or three inches.
We've got to take it all out and we've got to put up there,
probably twenty, twenty-four, or thirty inches of pavement back,
because the traffic is so heavy that we don't want to have to go
back there for another thirty years, or twenty years, or
whatever the design life is.
This process where you just mill off an inch and a half and put
an inch and a half back on, you are probably going to have to go
back probably every ten to fifteen years and do it again,
but the traffic is not such that that is a problem.
So there's a cost and effect evaluation that comes out and so
this is the method they are using.
Go ahead.
>> Dr. Wahby: When you remove the top part,
would you disturb the lower?
[Unclear dialogue]
>> Charlie: No, not really.
This is a very high speed what they would call a mandrel down
here that has carbide tipped teeth.
And it actually has the ability to go in and actually grind off
an asphalt surface and grind off concrete and it really does not
disturb the underlying, yeah.
Here is a picture where you see that it has all been ground off.
See, it looks like there are paths going this way, or marks,
it's all been ground off at this point.
They've started to lay the asphalt.
And you lay the asphalt from the high side going down, because
you always want the water to overlap,
going down toward the infield.
>> Dr. Wahby: Is the reason for speed or security
[unclear dialogue]?
>> Charlie: Well, for both.
For both, but whenever we lay asphalt, you always, or you
normally always start from the high side and go down.
This again is just another picture.
They've got a trans.
Here's a truck, they've got a material transfer device, just
like we own and then they dump it in the paver.
And then they roll it right behind.
Here again talking about samples, what they are doing
here, they are putting down steel plates, and then when they
come over it with a paver and then when they roll it, they'll
be able to go back with a metal detector and they'll be able to
find where those steel plates are and then they'll cut out
sections of that track so they can take them back to a lab and
test them.
And make sure that they are getting what
they are paying for.
Here is a different method.
This, again, they are coring the pavement, and this is been this
is part of the new track so they are coring it and again you see
that they are coring it right on this joint?
Here's one painted on the joint.
They are coring it right on the joint.
Because joints again are extremely important and if you
don't have compaction there that's when you are going to
start having wear.
And again, with the speed and everything else you have on a
200 plus mile per hour racecar, you don't want to have any
problems with the joints.
>> Dr. Wahby: The coring would go like this?
And [unclear dialogue]
>> Charlie: You actually you actually have a kind of a
handmade device that you just put it in and you kind of go
back and forth and yeah it's pretty primitive, but it works.
That was the asphalt plant that they used to produce the mix
that went out on the speedway.
Go ahead.
Here again you can see the electronic devices that are used
to lay the asphalt.
And this is kind of an interesting picture because you
talked about how many lifts we put down.
Normally, we consider that when you put down a lift of asphalt
that you are taking about seventy percent of the roughness
out, so you got seventy percent, then you got seventy percent of
what's left, and seventy percent of what's left, and seventy
percent of what's left.
In this particular instance, since it is a racetrack, they've
put down one level and it appears this is the second level
and that's a third level.
So they are trying to get it absolutely as smooth as they
possibly can.
>> Dr. Wahby: When you are pouring concrete, you worry
about rain.
If it rains, you cannot really pour concrete.
[Unclear dialogue]
>> Charlie: Correct
>> Dr. Wahby: How would that compare to putting?
>> Charlie: If you just have a light rain, it really
won't affect it.
But if you have a heavy rain, it will start to cool down that
asphalt, and it will actually drain through some of the pores.
So we are very concerned about rain also.
>> Dr. Wahby: You don't want rain, water to come
inside the mix?
>> Charlie: That is correct. Yeah.
Again, they must have had some kind of a time element here,
because they are paving at night and they use special rollers.
These rollers were from Germany, and the paver was from Germany.
I don't know