Geotech Lab Testing

The Bombay Textile Research Association (BTRA) is pleased to announce that its Geotech Laboratory is now accredited by Geosynthetics Institute (GSI), Folsom, Pensylvania, USA under the GAI ? LAP Accreditation Programme for the following 24 tests of geosynthetics products.

It is pertinent to mention that BTRA is the first institute in India and probably only the third institute outside USA to get this coveted accreditation. What this means to the geosynthetics producers and users is that they can get the products tested in BTRA with utmost confidence that the accuracy of the results are as good as any other GAI-LAP accredited laboratories. They can get the tests done in India, thus saving time and money without compromising on the quality of the results.

  1. ASTM D1004 - Test Method for Initial Tear Resistance of Plastic Film & Sheeting
  2. ASTM D1238 - Test Method for Flow Rates of Thermoplastics by Extrusion Plastometer ( Melt Flow Index )
  3. ASTM D1603 - Test Method for Carbon Black in Olefin Plastics
  4. ASTM D1693 - Environmental Stress-Cracking of Ethylene Plastics
  5. ASTM D1777 - Test Method for Measuring Thickness of Textile Materials
  6. ASTM D3776 - Test Method for Mass Per Unit Area (Weight) or Woven Fabric
  7. ASTM D4491 - Determination of water permeability of Geotextiles by permittivity method
  8. ASTM D4533 - Test Method for Trapezoid Tear Resistance of Geotextile
  9. ASTM D4595 / ISO10319 - Tensile Properties of Geotextiles by the Wide-Width Strip Method
  10. ASTM D4632 - Grab Breaking Load and Elongation of Geotextiles
  11. ASTM D4751 - Apparent opening size of Geotextiles
  12. ASTM D4833 - Index Puncture Resistance of Geotextiles, Geomembranes and Related Products
  13. ASTM D4884 / ISO10321 - Test Method for Seam Strength of Sewn Geotextiles
  14. ASTM D4885 - Test Method for Determining Performance Tensile Strength of Geomembranes Using Wide Strip Testing
  15. ASTM D5034 / ISO13934 - Breaking Strength and Elongation of Textile Fabrics (Grab Method)
  16. ASTM D5035 - Breaking Strength and Elongation of Textile Fabrics (Strip Method)
  17. ASTM D5199 - Nominal Thickness of Geotextiles and Geomembranes
  18. ASTM D5261 / ISO9864 - Test Method for Measuring Mass per Unit Area of Geotextiles
  19. ASTM D5323 - 2% Secant Modulus for Polyethylene Geomembranes
  20. ASTM D6241 / ISO 12236 - Test Method for the Static Puncture Strength of Geotextiles and Geotextile Related Products Using a 50-mm Probe
  21. ASTM D6637 - Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method
  22. ASTM D6693 - Tensile Properties of Nonreinforced Polyethylene and Nonreinforced Flexible Polypropylene Geomembranes
  23. ASTM D6767 - Pore Size Characteristics of Geotextiles by Capillary Flow Test
  24. ISO 13433 - Dynamic perforation (Cone Drop) Test

Geo-Materials Testing


  • Geotextiles: Woven and Nonwoven
  • Geogrids
  • Geocells
  • Geocomposites
  • Gabions
  • Geonets
  • Geomembranes
  • Geosynthetics Clay Liners
  • Prefabricated Vertical Drains
  • Coated Fabrics (Woven and Nonwoven): Rubber coated, PU Foam coated &Aluminum coated
  • Laminated fabrics (Woven and Nonwoven): Foam laminated, PVC laminated, HDPE laminated & LDPE laminated


  • Mass per Unit Area
  • Creep & Creep rupture behavior
  • Thickness, Grab Strength
  • Trapezoidal Tear
  • Puncture Resistance
  • Permittivity
  • Apparent Opening Size (AOS)
  • CBR Puncture


  • Peel and Shear
  • Thickness, Density
  • Melt Flow Index
  • Carbon Black Content
  • Tear & Puncture Resistance
  • Tensile Properties


  • Aperture Size, Density
  • Melt Index
  • Carbon Black Content & Dispersion
  • Rib & Junction Strength
  • Wide Width


  • Mass per Unit Area
  • Thickness, Density
  • Melt Index
  • Carbon Black Content
  • Transmissivity
  • Compression Behavior
  • CBR Puncture


  • Bentonite Mass per Unit Area
  • Swell Index & Fluid Loss
  • Internal Shear
  • Index Flux or Permeability


  • Geosynthetic to Geosynthetic
  • Geosynthetic to Soils
  • Geosynthetic to GCL's
  • Soil


  • Protective Clothing
  • Automotive Carpet (Moulded)
  • Interlining / Cover Stock
  • Wadding (High Loft)
  • Floor Mats / Rugs / Carpets
  • Medical Textiles / Pads
  • P.U. Foam
  • Felts (Woollen)

Properties can be tested

  • Abrasion resistance ( Flat / Flex )
  • Absorbency
  • Air Permeability
  • Apparent Opening Size
  • Bending Length
  • Bentonite Swell Index
  • Binder Extraction
  • Biological Degradation
  • Birefringence
  • Breaking strength: Wide / Narrow strip tensile
  • Bursting Strength ( Ball & Diaphragm )
  • Bulk Density
  • Carbon Black Content
  • CBR Puncture Resistance
  • Compressional Recovery
  • Cone Drop Test
  • Direct Shear Test
  • Electrical Resistivity
  • Electrostatic charge
  • Environmental Stress Cracking Resistance [ESCR ]
  • Grab strength
  • Grave Tear
  • Liquid Strike Through Time
  • Melt Flow Index
  • Particle Size Analysis
  • Peel bond strength
  • Pore Size
  • Pullout Resistance
  • Thickness
  • Trapezoidal Tear strength
  • Shear Strength
  • Stress Cracking Resistance
  • Swell Index(Water Blocking Tape)
  • Water Permeability (Through-Plane)
  • Weld Strength(Seam Peel)

Indian Test Methods
ISO Test Methods
ASTM Test Methods
INDA-EDANA Test Method
DIN-EN Test Methods