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Build a Concrete Driveway the Right Way

You know you need a new driveway. That's the easy part. But you're torn between using asphalt or concrete. Concrete looks great but does it last 25 or 30 years as promised? The short answer is, yes--a concrete driveway can last you at least 30 years. But only if it's installed, finished and cured properly. Here's how.

Concrete is a fickle material and prone to cracking. Although it can be compressed or squeezed without cracking under the pressure, it doesn't take stretching or bending very well at all. The goal is to minimize the potential for cracking by pouring it over a stable, hard surface, and by constructing it properly with expansion joints and reinforcing steel.

REGIONAL PAVING & CONCRETE properly grades and compacts the soil before setting the forms or pouring the concrete. This is absolutely critical to avoid the stretching or crumbling effect. For example, what do you think will happen if your driveway is poured over soft, unstable soil? Without a solid foundation, whole sections of the driveway will crack under the weight of your car.

Second, REGIONAL PAVING & CONCRETE installs control joints. we discuss this before your project begins. In addition to stretching, the other thing concrete doesn't do well is shrink when it dries. The larger the section, the more it will shrink as it hardens-about 1/16 of an inch per ten feet. To control cracking caused by the inevitable shrinking, we will use control joints that actually encourage the concrete to crack at the control joint. It's done by cutting exact, neatly tooled lines in the concrete slab, at minimum intervals of fifteen feet or less. These joints should be deep enough to absorb the stress, preferably at least one-quarter the depth of the slab. Corners are weak points that must be protected from cracking. If your driveway will have corners, the control joint should radiate outward from the corner into the slab.

REGIONAL PAVING & CONCRETE installs steel reinforcement to provide extra strength and evenness. Without it, there's nothing to hold cracked slabs together or keep the cracks from getting bigger. Steel also helps the slabs to stay level with each other. It should be installed no deeper than two inches from the concrete surface.

Finally, it's well worth the extra cost to request thicker concrete, a minimum of five and one half 5-1/2 inches is ideal. Although other contractors might say that four inches is adequate, why not buy yourself an extra inch and a half 1-1/2 of strength? The slightly higher cost in material is not going to inflate the total installation cost that much.

Sealant may or may not be necessary, depending on the quantity of concrete poured, its design strength, and if it was already "moist-cured" with a curing compound. Weak concrete should be sealed.

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