Skip to main content

Pavement Interlayers

Nonwoven interlayer fabrics provide multiple benefits including stress absorption, bond breaking, and waterproofing; there are two types of interlayer geotextiles – overlay and bond breaker fabrics.

Overlay fabrics are used with flexible pavements to create a moisture barrier between layers and control reflective cracking. Bond breakers provide separation and improve drainage with concrete pavements.

TerraTex® nonwoven geotextiles are made up of polypropylene fibers. These fibers are needled to form a stable and durable network such that the fibers retain their relative position. It is non-biodegradable and resistant to most soil chemicals, acids, and alkali with a pH range of 3 to 12. Unless noted otherwise, all values are minimum average roll values (MARV).

Pavement Interlayers Specifications
PropertyTest MethodEnglishUnit (Metric Unit)TerraTex® OLTerraTex® OL-ITerraTex® OL-HDTerraTex® N14E Bond BreakerTerraTex® N16 Bond Breaker
Weight (Typical)1ASTM D5261oz/sy (g/m2)3.6 (129)4.1 (139)4.6 (170)13.8 (470)14.8 (500)
Grab TensileASTM D4632lbs (kN)90 (0.400)102 (0.453)120 (0.534) () ()
Grab ElongationASTM D4632% (%)50 (50)50 (50)50 (50) () ()
Trapezoid TearASTM D4533lbs (kN)35 (0.155)45 (0.20)50 (0.22) () ()
CBR PunctureASTM D6241lbs (kN)275 (1.22)300 (1.33)325 (1.45) () ()
Asphalt Retentionsy (L/m2)0.24 (1.1)0.24 (1.1)0.24 (1.1) () ()
Melting PointºF (ºC)300 (150)300 (150)300 (150) () ()
UV ResistanceASTM D4355% @ 500 hrs (% @ 500 hrs)70 (70)70 (70)70 (70)70/500 (70/500)70/500 (70/500)
Width Width TensileASTM D4595Lb/ft (kN/m) () () ()685 (10)685 (10)
Wide Width ElongationASTM D4595% (%) () () ()60% (60%)60% (60%)
Thickness1ASTM D5199mils (mm) () () ()at 2 kPa: 120 mils
at 20 kPa: 100 mils
at 200 kPa: 40 mils (at 2 kPa: 3mm
at 20 kPa: 2.5mm
at 200 kPa: 1 mm)		at 2 kPa: 120 mils
at 20 kPa: 100 mils
at 200 kPa: 40 mils (at 2 kPa: 3mm
at 20 kPa: 2.5mm
at 200 kPa: 1 mm)
Permeability under load1ATM 5493m/s (m/s) () () ()at 20 kPa: 0.0001 (at 20 kPa: 0.0001)at 20 kPa: 0.0001 (at 20 kPa: 0.0001)
Hydraulic Conductivity1ASTM 6574m/s (m/s) () () ()at 20 kPa: 0.0005
at 200 kPa: 0.0002 (at 20 kPa: 0.0005
at 200 kPa: 0.0002)		at 20 kPa: 0.0005
at 200 kPa: 0.0002 (at 20 kPa: 0.0005
at 200 kPa: 0.0002)
Product Data SheetsDownload TerraTex® OL Apples PDSDownload TerraTex® OL-I Apples PDSDownload TerraTex® OL-HD Apples PDSDownload TerraTex® N14E Bond Breaker Apples PDSDownload TerraTex® N16 Bond Breaker Apples PDS
  1. At the time of manufacturing. Handling, storage, and shipping may change these properties.
  2. Value represents maximum avg roll value
  3. Specifications can vary by project. Please contact local sales rep for technical assistance and product selection.