Mirafi® P - Geomembrane Liner Protection Geotextile

Separation of fine-grained subgrade from coarse aggregate in road and pavement construction, preventing intermixing so the load-distributing and drainage properties of the sub-base are retained. Reduces aggregate requirement and prevents the pumping that shortens pavement life. MIRAFI S, grade selected from subgrade strength, traffic loading and aggregate particle size.

Filter wrapping to French drains, fin drains, blanket drains and trench systems. The filter must pass water freely while retaining fines, with O90 between 0.08 and 0.12 mm and permeability of at least 50 l/m²s proven effective in practice. MIRAFI S for standard duty; MIRAFI F where clogging risk is high or the drain cannot be maintained.

Cushioning geomembrane liners against puncture from the subgrade below and the drainage or ballast layer above. MIRAFI P is certified to EN 13719 for protection efficiency, the figure a liner designer specifies against, with deformation at 300 kPa from 1.7 % to 0.6 % across the range.

Protection layers to TSF and heap leach pad liner systems, where liner integrity under placement and operational loading determines containment performance. MIRAFI P in heavy grades from P60 to P120, supported by MIRAFI S for underdrainage filtration.

Protection and separation layers in landfill basal lining and capping systems, including protection of the geomembrane from the leachate drainage stone above. MIRAFI P for protection, MIRAFI S for separation of cover soils.

Mechanically bonded continuous-filament UV-stabilised PP nonwoven with a 50-year track record in separation and filtration of trafficked areas on weak soils. Nine grades from S21 to S82 (90–385 g/m²) cover garden paths and light access roads through to heavy vehicle platforms and road or rail formation, all ASQUAL certified. Permeability 55–180 mm/s, O90 85–135 µm.

Two-layer continuous-filament PP nonwoven - one layer engineered as the filter, the other as integral protection against filter damage. The construction delivers 25–40 constrictions through the filter layer, giving extremely low clogging risk and high soil retention security. Three grades: F60, F70 and F80 (400–800 g/m²), O90 80–90 µm. Resistant to chemical agents and microorganisms occurring in seas and rivers

Needle-punched continuous-filament PP nonwoven developed specifically for geomembrane protection efficiency. Nine grades from P20 to P120 (200–1,200 g/m²), certified to EN 13719 with deformation at 300 kPa from 1.7 % down to 0.6 %. CBR puncture 2.4–11.3 kN. Specified for tailings storage facilities, heap leach pads, landfill cells, reservoirs and dams.

Continuous-filament PP nonwoven with abrasion-resistant additive and UV stabiliser, developed with European railway authorities for the mechanical stresses at the ballast interface. Validated by vibrogir testing with SNCF: 200 hours of loading, equivalent to 20 years at 100,000 load tons per day, with no loss of puncture resistance and no major decrease in permeability or flow rate.