BOUND RECYCLED GLASS POROUS PAVEMENT
INSIDE THE FLOODPLAIN | OUTSIDE THE FLOODPLAIN

What Is It?

Cost: $8.50-$18.00 per sq ft. (FilterPave)
Applications: Parking lots, pathways, sidewalks, plazas, driveways, public spaces, tree pits, light vehicular traffic. Higher stone aggregate mixes can handle somewhat heavier vehicular loads (up to 2.7 tons).
Service Life: 15+ years

Bound recycled glass porous pavement is similar to resin-bound paving except that a mixture of recycled glass and stone is used for the aggregate. The mixture can range from 100% recycled glass to 20% glass and 80% stone for heavier vehicular loads and longer service life. Bound recycled glass pavement is extremely porous, with void space of 39-47% (more than double that of porous asphalt and pervious concrete), reducing the rate of clogging and the need for maintenance. When clogged with sediment, infiltration rates were still measured at over six inches per hour, exceeding multiple stormwater standards.

As with other permeable pavements, periodic vacuuming will help maintain infiltration rates, though many installed systems have maintained normal functionality after five years without vacuuming. In addition, higher glass-content mixtures (50%+) will require a topcoat every two to three years depending on traffic load to prevent shedding. Recycled glass pavement will also contribute to LEED credits: the pavement is comprised of regionally-sourced, recycled materials, has a solar reflective index of 29 to 62, and permeability and filtration rates meet LEED standards.

Benefits

  • Enhances groundwater infiltration while reducing stormwater runoff volume, rate, and pollutants.
  • Recycled glass and aggregate reduce urban heat island through increased reflectivity and evaporative cooling.
  • Wide range of glass colors can help preserve urban aesthetics.
  • Recycled content: approximately 90 glass beverage bottles used in every square foot of paving.
  • Highest porosity of other porous pavements, reducing clogging and need for vacuuming.
  • Resistant to freeze-thaw cycles and extreme heat—binding agent expands and contracts easily.
  • Reduces occurrence of black ice/freezing puddles in cold climates; requires less applied deicers.

Drawbacks

  • Pollutants and deicing salts can infiltrate groundwater—should not be installed in areas where hazardous material spills are possible.
  • Higher glass mixtures require additional maintenance (topcoat every two to three years).
  • More expensive than other types of permeable pavement.
  • Snow removal can be more difficult than with other types of paving. Plows must use polycarbonate type-cutting blades.

Regulatory Impacts and Requirements

A summary of potential regulatory touchpoints follows below:
Bound-Recycled-Glass-Porous-Pavement

Financing Options, Incentives, And Rebates

Additional Resources

Project Examples

SAMPLE OF SUPPLIERS

SOURCES

Photo credit: Labeled for reuse by greenercountry.com