Geosynthetic Institute
GRI Test Methods
(2020)
Geotextile (GT) Related
GT1 Test
Method for Geotextile Filter Performance via Long Term Flow (LTF) Tests
GT2 Test Method
for Biological Clogging of Geotextile or Soil/Geotextile Filters (1987) (see ASTM
D1987)
GT3 Test
Method for Deterioration of Geotextiles from Outdoor Exposure (see ASTM
D5970)
GT4 Test
Method for Geotextile Permittivity-Under-Load (1991) (discontinued,
see ASTM D5493)
GT5 Test
Method for Tension Creep Testing of Geotextiles (April 6, 1992) (see ASTM
D5262)
GT6 Test
Method for Geotextile Pullout (see ASTM D6706)
GT7 Practice
for Determination of Long-Term Design Strength of Geotextiles
GT8 Test Method
for Fine Fraction Filtration Using Geotextile Filters
GT9 Guide for
Grip Types for Use in Wide Width Testing of Geotextiles and Geogrids
GT10
Specification for Test Methods, Properties and Frequencies for High Strength
Geotextile Tubes used as Coastal and Riverine Structures
GT11 Practice
for Installation of Geotextile Tubes used as Coastal and Riverine Structures
GT12(a)
Specification for Test Methods and Properties for Nonwoven Geotextiles Used as
Protection (or Cushioning) Materials - ASTM Version
GT12(b)
Specification for Test Methods and Properties for Nonwoven Geotextiles Used as
Protection (or Cushioning) Materials - ISO Version
GT13(a)
Specification for Test Methods and Properties for Geotextiles Used as
Separation Between Subgrade Soil and Aggregate - ASTM Version
GT13(b)
Specification for Test Methods and Properties for Geotextiles Used as
Separation Between Subgrade Soil and Aggregate - ISO Version
GT14 Test
Method for Hanging Bag Test for Field Assessment of Fabrics Used for Geotextile
Bags, Containers and Tubes (see ASTM D7701)
GT15 Test
Method for Pillow Test For Field Assessment of
Fabrics/Additives for Geotextile Bags, Containers and Tubes (see ASTM
D7880)
Geogrid (GG) Related
GG1 Test
Method for Geogrid Rib Tensile Strength (see ASTM D6637)
GG2 Test
Method for Geogrid Junction Strength (see ASTM D7737)
GG3(a) Test
Method for Tension Creep Testing of Stiff Geogrids (Jan. 30, 1991) (see ASTM
D5262)
GG3(b) Test Method
for Tension Creep Testing of Flexible Geogrids (Jan. 30, 1991) (see ASTM
D5262)
GG4(a)
Practice for Determination of the Long-Term Design Strength of Stiff Geogrids
GG4(b)
Practice for Determination of the Long-Term Design Strength of Flexible Geogrids
GG5 Test
Method for Geogrid Pullout (see ASTM D6706)
GG6 Guide for
Grip Types for Use in Wide Width Testing of Geotextiles and Geogrids
GG7 Test
Method for Carboxyl End Group Content of PET Yarns
GG8 Test
Method for Determination of the Number Average Molecular Weight of PET Yarns
Based on a Relative Viscosity Value
GG9 Test
Method for Torsional Behavior of Bidirectional Geogrids When Subjected to
In-Plane Rotation (see ASTM D7864)
GG10 Test
Method for Determination of the Flexural Rigidity of Geogrids (see ASTM
D7748)
Geonet (GN) Related
GN1 Test
Method for Compression Behavior of Geonets (see ASTM D6364)
GN2 Guide for
Joining and Attaching Geonets and Drainage Composites
GN3 Assessing
the Strength of Plastic Cable Ties for Joining Geonets
GN4 Test
Methods, Required Properties and Testing Frequency for Biplanar Geonets and
Biplanar Geonet Composites
Geomembrane (GM) Related
GM1 Practice
for Seam Evaluation by Ultrasonic Shadow Method
GM2 Guide for
Embedment Depth for Anchorage Mobilization
GM3 Test
Method for Large Scale Hydrostatic Puncture Test (see ASTM
D5514)
GM4 Test
Method for Three Dimensional Geomembrane Tension Test (see ASTM
D5617)
GM5(a) Test
Method for Notched Constant Tensile Load (NCTL) Test for Polyolefin Resins or
Geomembranes (1992) (see ASTM D5397)
GM5(b) Test
Method for Single Point NCTL Test for Polyolefin Resin or Geomembranes (see ASTM D5397
Appendix)
GM5(c) Test
Method for Seam Constant Tensile Load (SCTL) Test for Polyolefin Geomembrane
Seams
GM6 Practice
for Pressurized Air Channel Test for Dual Seamed Geomembranes
GM7 Practice
for Accelerated Curing of Geomembrane Test Strip Seams Made by Chemical Fusion
Methods
GM8 Test
Method for Measurement of the Core Thickness of Textured Geomembranes (see ASTM
D5994)
GM9 Practice
for Cold Weather Seaming of Geomembranes
GM10 Specification
for Stress Crack Resistance of HDPE Geomembrane Sheet
GM11 Test
Method for Accelerated Weathering of Geomembranes Using a Fluorescent UVA
Device (see ASTM D7238)
GM12 Test
Method for Asperity Measurement of Textured Geomembranes using a Depth Gage (See ASTM
D7466)
GM13
Specification for Test Methods, Properties and Testing Frequency for High
Density Polyethylene (HDPE) Smooth and Textured Geomembranes
GM14 Guide for
Selecting Variable Intervals for Taking Geomembrane Destructive Seam Samples Using
the Method of Attributes
GM15 Test
Method for Determination of Ply Adhesion of Reinforced Geomembranes (see ASTM
D6636)
GM16 Test
Method for Observation of Surface Cracking of Geomembranes
GM17
Specification for Test Methods, Properties and Testing Frequency for Linear Low Density Polyethylene (LLDPE) Smooth and Textured
Geomembranes
GM18
Specification for Test Methods, Properties and Testing Frequency for Flexible
Polypropylene (fPP and fPP-R) Nonreinforced and Reinforced Geomembranes
GM19a
Specification for Seam Strength and Related Properties of Thermally Bonded
Homogeneous Polyolefin Geomembranes/Barriers
GM19b
Specification for Seam Strength and Related Properties of Thermally Bonded
Reinforced Polyolefin Geomembranes/Barriers
GM20 Guide for
Selecting Variable Intervals for Taking Geomembrane Destructive Seam Samples
Using Control Charts
GM21
Specification for Test Methods, Properties and Testing Frequency for Ethylene
Propylene Diene Terpolymer (EPDM) Nonreinforced and Scrim Reinforced
Geomembrane
GM22
Specification for Test Methods, Required Properties and Testing Frequencies for
Scrim Reinforced Polyethylene Geomembranes Used in Exposed Temporary
Applications
GM23 Test
Method for Laboratory and/or Field Observation of Surface Chalking of Flexible
Polypropylene Geomembranes
GM24 Practice
for Incubation and Subsequent Evaluation of Single 180° and Double 180° Folding
of Geomembranes
GM25
Specification for Test Methods, Test Properties and Testing Frequency for
Reinforced Linear Low Density Polyethylene (LLDPE-R)
Geomembranes
GM26 Practice
for Smoke Testing of Field Fabricated Geomembranes
GM27 Test
Method for Determination of Plasticizer Content of Polyvinyl Chloride
Geomembrane Formulations Using Soxhlet Extraction
GM28
Specification for Test Methods, Test Properties and Testing Frequencies for
Reinforced Chlorosulfonated Polyethylene (CSPE-R)
Geomembranes
GM29 Practice
for Field Integrity Evaluation of Geomembrane Seams (and Sheet) Using
Destructive and/or Nondestructive Testing
GM30 Test
Methods, Test Properties and Testing Frequency for Coated Tape Polyethylene
(cPE) Barriers
GM31
Compression Test Method to Assess Puncture and/or Deformation of Geomembranes
Under Site-Specific Conditions
GM32 Standard
Practice for Geomembrane Seaming Using Data Acquisition Hot Wedge Welding
Devices
Geosynthetic Clay Liner (GCL) Related
GCL1 Test
Method for Swell Measurement of the Clay Component of GCL's (see ASTM
D5890)
GCL2 Test
Method for Permeability of Geosynthetic Clay Liners (GCLs) (see ASTM
D5887 and ASTM D6766)
GCL3
Specification for Test Methods, Required Properties, and Testing Frequencies of
Geosynthetic Clay Liners (GCLs)
GCL4 Guide for
Gripping of Reinforced GCLs to End Platens During Direct (Interface) Shear
Testing
GCL5 Guide for
Design Considerations for Geosynthetic Clay Liners (GCLs) in Various
Applications
GCL6 Practice
for Field Seaming of Overlapped Geosynthetic Clay Liners (GCLs)
GCL7 Test
Method for Determining the Tensile Shear Seam Strength of Geosynthetic Clay
Liners (GCLs)
GCL8 Test
Method for Insitu Tensile Strength Verification of
Geosynthetics Clay Liner (GCL) Seams
Geocomposite (GC) Related
GC1 Test
Method for Soil-Filter Core Combined Flow Test
GC2 Test
Method for Strip Drain Flow Rate Under Load
GC3 Test
Method for Strip Drain Kinking Efficiency
GC4 Test Method
for Compression Behavior of Prefabricated Edge Drains and Sheet Drains
GC5 Test
Method for Erosion Control Systems to Protect Against Soil Detachment by
Rainfall Impact and Overland Flow Transport
GC6 Test
Method for Erosion Control Systems for High Velocity Flows in Channels
GC7 Test
Method for Determination of Adhesion and Bond Strength of Geocomposites (see ASTM
D7005)
GC8 Guide for
Determination of the Allowable Flow Rate of a Drainage Geocomposite
GC9 Test
Method for Mechanical Deformation Behavior of Geosynthetic Aggregate Drainage
Systems
GC10 Test
Method for Hydraulic Behavior of Geosynthetic Aggregate Drainage Systems
GC11 Guide for
Retrieval of Geocells from the Field to Evaluate Installation Distortion and/or
Damage
GC12 Test
Method for Mechanical Deformation Behavior of Geocell Systems
GC13 Guide for
Joining and Attaching Geonets and Drainage Composites
GC14 Test
Methods, Required Properties and Testing Frequency for Polymeric Turf
Reinforcement Mats
GC15
Determining the Flow Rate per Unit Width of Drainage Geocomposites with
Discrete High Flow Components
GC16 Test
Methods, Required Properties and Testing Frequency for Prefabricated Vertical
Drains (PVDs)
Geosynthetic (GS) Related (i.e.,
Multipurpose)
GS1 Test
Method for CBR Puncture Strength (see ASTM D6241)
GS2 Test
Method for Rupture Strength of Geosynthetics by Pendulum Impact
GS3 Guide for
Selecting In-Situ Monitoring Methods and Devices for the Evaluation of
Geosynthetic Performance
GS4 Test
Method for Time Dependent (Creep) Deformation Under Normal Pressure
GS5 Test
Method for Impregnation of Geosynthetics Under Load
GS6 Test
Method for Interface Friction Determination by Direct Shear Testing (Jan. 30,
1991) (see ASTM D5321)
GS7 Test
Method for Determining the Index Friction Properties of Geosynthetics
GS8 Test
Method for Determining the Connection Strength of Mechanically Anchored
Geosynthetics (see ASTM D6638)
GS9 Test
Method for Oxidative Induction Time of Polyethylene Geosynthetics by High Pressure
Differential Scanning Calorimetry (see ASTM D5885)
GS10 Test
Method for Accelerated Tensile Creep and Creep-Rupture of Geosynthetic
Materials Based on Time-Temperature Superposition Using the Stepped Isothermal
Method (see ASTM D6992)
GS11 Guide for
Constructing Test Pads to Assess Protection Materials Intended to Avoid
Geomembrane Puncture
GS12 Guide on
Lifetime Prediction Using TTS and Arrhenius Modeling
GS13 Guide for
Geomembrane-Related Geocell Seam Strength and Its Efficiency With
Respect to the Perforated Sheet Strength
GS14 Test
Method for Average Wall Thickness of a Geomembrane-Related Geocell by Indirect
Measurement
GS15
Specification for Test Methods, Test Properties and Testing Frequency for
Geocells Made From High Density Polyethylene (HDPE) Strips
GS16
Geosynthetic Sampling for Subsequent Laboratory Conformance Testing
GS17
Determining the Percent Open Area (POA) of Various Geosynthetics
GS18 Casting Laboratory Tested or Field
Retrieved Geosynthetic Cross Sections
GS19 Test Methods, Required Properties
and Testing Frequency for Geospacers and Geospacer Drainage Composites
GS20 Exposed Lifetime Prediction of
Geosynthetics Using Laboratory Weathering Devices
GS21 Full-Width Tensile Properties of Geostrips
GS22 Determining the Residual Stress
Within Geosynthetics
GS23 Determining the Dimensional
Stability of Geosynthetics