Placing a Puddle-Proof Driveway

After excavating down about 18 inches and digging trenches across the driveway every 10 feet for drainage, we covered the whole thing with a nonwoven landscape filter fabric and 12 inches of 3/4-inch washed stone.

Because of its consistency, pervious concrete cannot be pumped; in fact, it’s so thick that you need to use a short concrete chute to discharge the mix.

The concrete was dumped one load at a time.

Workers distributed the fresh concrete with rakes.

While the machine was being refilled, crew members compacted the edges and screeded the surface flat with a straightedge.

Running a steel vibratory roller over the driveway increases the density of the top couple of inches.

After each batch of concrete had been screeded, edged, and densified, workers immediately unrolled a plastic sheet that was at the ready, and pressed it into the fresh, wet concrete to keep it from curing too quickly.

With the plastic covering the wet concrete, a crew member rolled a heavy steel roller over the surface, which compacted, consolidated, and smoothed the surface while preserving the voids in the concrete and ensuring that the plastic stayed in complete contact with the driveway surface so that hydration didn't happen too quickly.

To cut a control joint, a crew member carefully placed a rolling joint tool on top of the plastic-covered wet concrete and pushed the roller across the driveway from one side to the other.

After seven days, we took off the plastic and stripped the forms, leaving a finished surface that was smooth overall and ready to be driven on, but that had voids between the aggregate.

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