Parking Pavement

[kxa]

I am working on an existing parking lot that is being used by a 40 unit apartment building. There is a dumpster at the end of the lot which the sanitation trucks drive to pickup trash and then back out of the parking. Severe wheel rut, settlement (8") and some unraveling of the 1.5" thick asphalt can be seen in the wheel path of the truck. Elsewhere the asphalt looks good for the age (minor cracks).

I was planning on replacing the asphalt with 1.5" of top course and install an 8" thick reinforced concrete slab in front of the dumpster (12'W x 30'L). The other option I was considering would be to use 2.5" of binder and 1.5" of top and no concrete slab. For both options, 4"-6" of RCA would be installed and compacted. The project is located in the northeast area and snow, ice and salting would be a concern.

I would appreciate any thoughts, suggestions or reference materials.
Thanks

 

[rowingengineer]

Can you be a little more specific on your question. what concerns you with your ideas, I personally like the concrete driveway for the truck.

http://www.nceng.com.au/

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

 

[darthsoilsguy2]

very common spot for asphalt failure to occur on many existing pavements. it gets disproportionately loaded compared to the other paved surfaces since on most commercial and residential sites the worse offender is the dumpster truck. no matter what path the truck takes, it ends up in that spot and parks. There are loading dynamics to the subgrade that are different from driving loads.. it is very easy for the front wheels to carry a lot more truck load when the arm is boomed out with a full dumpster and maybe there is some dynamic loading from the slam-dunking of the trash. you don't have to prove it to the Owner, there is a history there. all pavement has a lifecycle and local areas that prematurely fail should be designed stronger to make it to the next Big resurfacing job.

there could also be an underlying problem with an unstable subgrade, not enough drainage to prevent frost heaves (you said northeast... btw this is an international forum so be sure to mention the country in your posts although non-metric is a good clue)

 

[kxa]

Thank you all.

I have moved the posting to the Civil Engineering Forum.

 

[darthsoilsguy2]

ok. but you still haven't really given any info that could let someone tell you the difference between the 2 or your concerns. either fix will give you the opportunity to rebuild the subgrade. you have pavement structural numbers and costs if you need to twist the comparison into a number form.... looking at the OP again, if you have 8" ruts, i don't see a 10-inch solution in your future. you must have problems deeper than 10". I am also a little doubtful that the rut is 8" but more likely a 5-inch rut next to a 3-inch heave.