In response to customer preferences, Porous Pave Inc. has changed the standard size range of the recycled rubber chips in its surfacing material from 1/4-3/8 inch to 1/8-1/4 inch. The smaller, fine-cut rubber chips provide a more refined, smoother paved surface. An eco-friendly green building material made in the U.S., Porous Pave is a highly porous, durable and flexible pour-in-place permeable paving product. The XL formulation consists of 50 percent rubber chips and 50 percent stone aggregate with a moisture-cured, liquid binder. The XLS formulation is made with 100 percent rubber chips.
“We saw the need for a smoother finish based on comments and suggestions from landscape architects, hardscape contractors, homeowners, and facility managers,” says Dave Ouwinga, president, Porous Pave Inc. “We have worked with rubber-aggregate permeable surfacing for more than a decade. When our testing verified that smaller, 1/8 -1/4 inch rubber chips would not compromise our high standards for porosity and permeability, we adopted the fine-cut chip as our new standard.”
Discarded tires, saved from landfills and recycled, are shredded and processed into rubber chips for Porous Pave. With 27 percent porosity, Porous Pave made with the fine-cut chips retains 93 percent of the porosity and permeability of the product made with the traditional larger size. Porous Pave Inc. and its distributors will continue to supply the bigger chips for extensions of existing installations, as well as for new projects, with a minimum size of 5,000 square feet, where a slightly coarser, higher traction finish with 29 percent porosity is preferred.
Porous Pave XL, the formulation with the 50-50 rubber chip and aggregate mix, is a heavy-duty material poured in place at thicknesses of 1 to 2 inches over a compacted aggregate base of 2, 4 or 6 inches, depending on the application and required compressive strength. It retains stormwater on site by allowing rain and runoff to drain directly through its entire pervious surface, filter down into the aggregate base, and then slowly seep into the soil below. XL is used for loading docks, parking lots and driveways, building entrances and courtyards, patios, footpaths and walkways, golf cart paths, and tree surrounds that require a strong, durable, slip-resistant and permeable surface.
With 100 percent recycled rubber chip content, Porous Pave XLS permeable surfaces are more impact absorbing. XLS is a good option for pool surrounds, as well as school and public park playgrounds. Its light weight makes it ideal for rooftop applications, such as patios and pavement borders on green roofs.