posted on Jun, 6 2013 @ 08:31 PM
reply to post by Zaphod58
As I stated earlier, I do not believe it would ever be necessary for an interstate to be used in this fashion...there are so many
military/international/national/regional airports in this country, it would take an extremely sophisticated and well concerted attack by an enemy to
render them all useless; however, if it did happen, every geographical area of the US has at least several sections of interstate within the area that
could handle any plane in the US inventory...you generally only need a 10 inch thick pavement...most interstates certainly fit this requirement...and
like I said, the I-80/94/294 stretch through NW Indiana/South Suburbs of Chicago are over 20 inches thick of reinforced concrete...of course, this
was, at one time, the busiest highway in the entire world.
If you can land a fighter aircraft on a moving ship in the ocean, what on earth would prevent you from landing it on an interstate? I mean, come on...
Because airport pavement construction is so expensive, manufacturers aim to minimize aircraft stresses on the pavement. Manufacturers of the
larger planes design landing gear so that the weight of the plane is supported on larger and more numerous tires. Attention is also paid to the
characteristics of the landing gear itself, so that adverse effects on the pavement are minimized. Sometimes it is possible to reinforce a pavement
for higher loading by applying an overlay of asphaltic concrete or portland cement concrete that is bonded to the original slab. Post-tensioning
concrete has been developed for the runway surface. This permits the use of thinner pavements and should result in longer concrete pavement life.
Because of the susceptibility of thinner pavements to frost heave, this process is generally applicable only where there is no appreciable frost
As you can see in the text, post-tensioning the concrete has been developed for runways...this, it should be noted, has also been in use for road
construction for some time...a vast majority of newer road surfaces are now bulit of concrete, rather than asphalt, because the higher costs of
petroleum (used in the production of asphalt) have resulted in higher cost-per-mile(CPM) of construction. Concrete roadways are, in some cases, much
more cost effective.
edit on 6-6-2013 by totallackey because: further content