2006-09-20 17:06:49 · 9 answers · asked by presidentrichardnixon 3 in Cars & Transportation ➔ Aircraft
I would have to say over 50 years. Concrete lasts a very long tme, even though it cracks and gets rough.
2006-09-20 17:14:46 · answer #1 · answered by Curth 3 · 0⤊ 0⤋
I've poured lots of them. The approaches where the jets touch down are very thick (4 to 6 feet) The runways are usually around a foot thick. It's very much like the freeway. They usually have a joint or a saw-cut about every twenty feet to help keep them from cracking. The concrete lasts indefinitely, (at least 20 plus years, and probably a lot longer) but they need to be resurfaced periodically. The weather and use slowly take a toll. This is typically done with asphalt, just like the freeway.
2006-09-22 11:30:37 · answer #2 · answered by Kim 4 · 0⤊ 0⤋
My home airport in Walnut Ridge, AR was built in the 1940s by the military. The landing threshold is around 6 feet thick!! It is still is good condition. The only issue with concrete is the frezzing and thawingduring winters. It causes cracks and the surface will get course if it is not keep in good condition.
2006-09-21 06:22:58 · answer #3 · answered by aceshigh 2 · 0⤊ 0⤋
This varies heavilly upon where this runway is. If you are talking up in the snow belt - tops 2 years, no more...
South it could be a lot more.
2006-09-20 17:08:58 · answer #4 · answered by special-chemical-x 6 · 0⤊ 0⤋
Forever.. They are poured 13-14 inches thick most times..
2006-09-20 17:08:38 · answer #5 · answered by ? 5 · 0⤊ 0⤋
may be 15-25 years
2006-09-20 17:07:36 · answer #6 · answered by Mr. Cool !!! 3 · 0⤊ 0⤋
Depends on the thickness, what type of reinforcing was used,and the type of aircraft landing on it.
2006-09-20 19:55:20 · answer #7 · answered by Knackers 4 · 0⤊ 0⤋
hopefully long enough for the last plane to land
2006-09-20 17:14:56 · answer #8 · answered by Anonymous · 0⤊ 0⤋
your life
2006-09-20 17:07:42 · answer #9 · answered by Anonymous · 0⤊ 0⤋