Polypropylene (PP) Geotextile: Characteristics and Engineering Applications

Material Properties

• Composition: Woven/nonwoven polypropylene fibers

• Key Advantages:

• Weight: 100-600 g/m² (lightweight handling)

• Tensile strength: 15-80 kN/m

• Hydraulic conductivity: 10⁻³ - 10⁻² cm/s

• Chemical resistance: pH 1-13 compatibility

Primary Applications

1. Water Conservancy Projects

• Dam Reinforcement

• Enhances slope stability with 25-40% increased shear resistance

• Typical installation: Layered with geogrids in embankment cores

• Canal Seepage Control

• Reduces water loss by 20-35% compared to traditional clay linings

• Cofferdam Construction

• Functions as composite filter/drainage layer under 5-15m water heads

2. Transportation Infrastructure

• Soft Ground Improvement

• Increases bearing capacity of clayey soils (CBR improvement ≥3 points)

• Installation depth: 0.3-1.2m below subgrade

• Pavement Maintenance

• Extends asphalt overlay service life by 3-5 years through crack bridging

3. Waste Containment Systems

• Landfill Liners

• Puncture protection for geomembranes (≥2000N static puncture resistance)

• Filtration efficiency: O₉₀<0.075mm for leachate management

4. Mining Engineering

• Tailings Storage

• Accelerates consolidation rates by 30-50% through vertical drainage

• Withstands 50-200kPa hydraulic pressures in stackable designs

5. Agricultural Applications

• Irrigation Efficiency

• Saves 15-25% water in unlined canals

• Prevents 0.5-1.2m/year topsoil loss on cultivated slopes

6. Building Construction

• Foundation Works

• Separation function for granular layers (AOS 0.1-0.5mm)

• Reduces differential settlement by 40-60% in embankments

Title: "PP Geotextiles: Multi-Sector Solutions for Geotechnical and Environmental Challenges"

Technical Standards:
▸ ASTM D4833 - Puncture resistance testing
▸ ISO 9864 - Mass per unit area
▸ EN 13252 - Hydraulic performance requirements

Material Selection Guide:

Sustainability Features:
✔ Recyclability: 100% thermoplastic reprocessing potential
✔ Service Life: 25+ years in buried applications
✔ Carbon Footprint: 30% lower than PET alternatives