How thick to pour a concrete driveway

by P K
(Reno NV)

Q. Hello, I am considering a concrete driveway addition 102 ft long by 15 ft wide. It will also park a 26,000 lb motorhome on it. What thickness should I go with, PSI of the concrete and what # rebar for reinforcement? I live in the Reno NV area and need this advice. Thanks for any assistance.

A. First, the sub-base is very important. A gravel base, compacted in lifts will provide a good base for the concrete driveway. I would make the concrete six inches thick and use 4000 psi concrete with entrained air. We use #4 rebar, tied 18 inches on center for reinforcement and also add fibermesh to the concrete. The water/cement ratio of the concrete should be kept low (a 4 or 5 slump) for good strength and workability. Using plasticizers would also help keep the water ratio low and increase the workability of the concrete.

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to General Concrete Questions.

If you liked this, please share.  Thanks!