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Re: Cracked/uneven driveway

Posted By: Nino
Tuesday, 26 December 2000, at 8:30 p.m.

In Response To: Cracked/uneven driveway (Lance Smith)

While my experience with concrete is very limited, I feel that the only way to go in this case would be complete replacement. I say this because the resurfacing jobs that I've seen have had less than satisfactory results. When pouring the new slab, you must make sure that the erosion problem has been taken care of. You may feel that the slab has settled as far as it can go, but if erosion has taken place, there's no reason to think that it's not still going on. The other key is proper ground prep. By that I mean you should dig to undisturbed soil to a level of about 10 to 12 inches. You then add a 6 to 8 inch layer of 1 inch pea gravel to provide drainage and stability. You then pour a 4 inch slab of at least 3000lb psi test using rebar as reinforcement. Make sure you have expansion joints every 12 feet (10 feet would be better) and add control joints as needed. I've seen driveways laid up as such last 20 YEARS with no large cracks and in exellent shape.

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