Geosynthetics

DuoBlock 500

Porous Paving System

The DuoBlock Porous Paving System is comprised of recycled plastic cellular paving units that encourage the rapid removal of surface water run-off into a structural voided sub-base layer.

When combined with compatible geotextiles, impermeable geomembranes, soil reinforcement products and suitable drainage systems, the DuoBlock System provides an effective and highly efficient sustainable urban drainage system (SUDS) in accordance with current CIRIA guidelines.

The system is suitable for attenuation and infiltration treatment of storm water run-off developed in accordance with Best Management Practices (BMP).


Applications

  • Attenuation Systems
  • Infiltration Systems
  • Porous Sub-Base Reinforcement


DuoBlock Performance Specification

Unit Size

500mm x 500mm x 50mm nominally

Weight

2kg

Cell wall void ratio

6%

Water absorption

nil

Infill surface area

90%

Compressive strength

2300kg

Infiltration rate through DuoBlock

144mm³/m²/hour (144,000mm/hr)

The SUDS design manual suggests infiltration rates of 5000mm/hr for gravels