Rigid pavement design for tracked vehicles
Rigid pavement design for tracked vehicles
(OP)
I am looking for any help( rules, experience and recomendations) how to design concrete pavement for tracked vehicles.
Tx
Tx
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Rigid pavement design for tracked vehicles
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RE: Rigid pavement design for tracked vehicles
RE: Rigid pavement design for tracked vehicles
RE: Rigid pavement design for tracked vehicles
Tracked vehicles present more of a surface abrasion problem than a loading problem. Designing a concrete pavement for the loads is easy...designing it to resist the pounding it will get from tracked vehicles is another problem.
The concrete should be relatively high strength for durability. The aggregate should be hard and durable, and as large as you can practicably use in the section you design. This is to cut down shrinkage.
If you are designing a staging area or such (like the pavement for a heavy equipment dealer or shop), then you should "armor" the joints. This is done by using steel angle with welded studs on both sides of the joints. This prevents the tracks from eroding and spalling the joints.
In short, I would use a 5000 to 6000 psi concrete mix, 1" to 1-1/2" nominal size granite or other hard coarse aggregate, a water-cement ratio of less than 0.5, and good control on placement and finishing. Design the thickness for the loads intended and pay attention to edge conditions as the control for thickness.
RE: Rigid pavement design for tracked vehicles
http://www.usace.army.mil/inet/usace-docs/armytm/tm5-822-13/
RE: Rigid pavement design for tracked vehicles
When you consider that tracked vehicles distribute the vehicular load over a wide area then the load transmitted to the subgrade will be low. Wheeled vehcles produce large loads over very small contact areas where the tyre touches the road surface. Consequently, the flexure in the slab and loads on the subgrade increase dramatically by comparison.
Follow Ron's mix design advice. Go for strong aggregates and don't worry too much about the polished stone value too much if you don't have high speed tyred vehicles on your road whic need to stop in a hurry.
RE: Rigid pavement design for tracked vehicles
Hi. Are you sure this is really a requirement? Tracked vehicles were specifically designed to run on soft, muddy and/or marshy terrain and now you want to design a surface where these vehicles are not meant to run. I have heard where it is unavoidable to run the tracked veicles on finished surface, they put rubber track on top of steel track before they start.
The best would be to keep the surface unfinished and not to put any pavement over there.
~flame~
RE: Rigid pavement design for tracked vehicles
I am still verifying requrements. I was told that pavement should be designed for 60-90 kips vehicles. It is unclear how many per day and what is the design time expectancy.
I do not see how any concrete surface will survive under steel track for a long time. I am thinking about 12" thick 700 psi flexural strength concrete( f'c=5000psi) reinforced with steel fiber. Is there any recomendations of using steel fibers in rigid pavement?
what are advantages of using granite?
RE: Rigid pavement design for tracked vehicles
Again, pay close attention to aggregate size, type, and water-cement ratio.
Advantage of granite is high abrasion resistance.
Ginger...thanks for the kind words.
Ron
RE: Rigid pavement design for tracked vehicles
DPA
RE: Rigid pavement design for tracked vehicles
intrusion pre-packed, anyone <G>...
RE: Rigid pavement design for tracked vehicles
TTFN