30 Dec Stormpave gets write up in Stormwater Solutions
The conventional answer to storm water in parking lots involves sloping the lot to a drain—or more accurately, drains—and piping it underground either off the property to another drain or to a nearby fenced-off retention pond or bioswale.
For the Luray-Page County Chamber of Commerce project we wrote about last year, the converted train depot’s property and surrounding area did not easily lend themselves to that solution from a space or a cost standpoint.
The clay brick pavers were chosen for two reasons: Rigorous, long-term testing has proven that they withstand both pedestrian and vehicular traffic for decades, and the clay pavers were more visually compatible with the surrounding streetscape.
The paver selected is a close first cousin—and virtually identical in appearance—to the English Edge paver that Pine Hall Brick Co. has made for decades, but there are some differences. The nibs, or spacers, on the StormPave are slightly wider. The 0.25-in. void between each paver provides the spaces through which rainwater is allowed to infiltrate.
The biggest difference, however, is what cannot be seen. A conventional paver is installed with a bed of crusher run gravel, which is compacted and then topped with 1 in. of sand. More sand is then swept into the gaps between the pavers. With a permeable clay brick paver, the installation is more complex. Open-graded aggregates without fine particles are used, rather than gravel and sand. A No. 2 stone is used as a subbase, then a finer grade of No. 57 stone is used as a base, followed by a bedding layer of No. 8 or No. 89 aggregate. The same stone that was used as the bedding layer is swept into the joints.