Pouring concrete for RV extension on driveway--rebar or mesh?

[NathanArnold]

I am getting ready to excavate and pour for a driveway extension to accommodate (eventually when we purchase) a Class A. We're planning on putting down a gravel bed that we'll compact and then pouring 4-5 inches of 3000 PSI concrete... trying to determine whether we should use mesh or rebar or any other input on suggestions. On a side note, we've already designed in small manholes with RV hookups we'll be installing for sewage and plumbing but interested in any experience/suggestions on the concrete pour. We're in SC and clay soil--pretty solid.

 

[Piperflyer]

Because of the weight of a Class A I wouldn't pour any thing less than a 4500 lb mix with at least 6" of concrete if it were me. Fibermesh would be my choice of an ad mixture to the concrete with either mesh or rebar.

 

[NathanArnold]

How thick should gravel sub-base be? I did have one person caution me on dangers of more brittle concrete at higher than 3500 psi but we could add fiber mix. I can park tires (or jacks) on plywood or stands to distribute weight as well.

 

[rhodies1]

I did just st this task last year. My cousin has worked in the concrete business for 40 years ,so here’s what we did with no issues,
1 - excavate14 inches of soil
2 - place 3/4 inch crush run in the hole about 3 inch deep at a time and compact thoroughly and leave approx 7 inches for concrete.
Yes,with the weight of a Class A you’ll need to ensure it’s thick enough.
3 - place down 6 by 6 inch square mesh
4 - use 5000 psi with air concrete and level and broom finish and once it hardens enough keep it wet for a day or so..prevents shrinkage and cracking.
5 - cut your concrete at 6 by 6 foot squares, this will prevent it from cracking.
I completed this last year and no cracks .

 

[rhodies1]

If you do as I explained you will not need plywood to distribute the weight