ISO 10319

The ISO 10319 standard defines a wide-width tensile test method for determining the tensile behavior of geotextiles and related geosynthetics. This method plays a critical role in evaluating how materials perform under real-world loading conditions, particularly in civil engineering, infrastructure, and environmental applications.

Unlike narrow-strip methods, ISO 10319 uses a wide specimen, ensuring that the measured tensile properties closely reflect field performance. This includes geotextiles tensile strength test, geotextiles elongation test, and stiffness evaluation.

Overview of ISO 10319 Testing Scope

ISO 10319 applies to a broad range of geosynthetics:

• Woven and nonwoven geotextiles
• Knitted geotextiles
• Geocomposites
• Geogrids (with adjusted specimen dimensions)
• Geomats and metallic geosynthetics

It excludes polymeric or bituminous barriers, but includes clay-based geosynthetic barriers.

The standard focuses on determining:

• Maximum tensile force per unit width
• Elongation at maximum force
• Secant stiffness
• Force-extension behavior

Principle of the Wide Width Tensile Test

In the ISO 10319 geotextiles wide width tensile test, the specimen is clamped across its entire width and subjected to a constant crosshead speed until rupture.

Key technical characteristics:

• The specimen width exceeds gauge length, minimizing edge effects
• Load is applied longitudinally until failure
• Strain is measured using an extensometer positioned at defined gauge points

This configuration ensures:

More realistic simulation of in-field stress conditions compared to narrow strip tests

Test Procedure for Geotextiles Tensile Strength Test

Specimen Preparation

• Standard gauge length: 100 ± 3 mm
• Reference marks: 60 mm apart (±30 mm from center)
• Alignment: Specimen must align with load direction (MD/CMD)

Machine Setup

• Select appropriate force range (accuracy within 10 N)
• Apply pre-tension (1%), except for nonwovens
• Set crosshead speed to achieve:
  • 20 ± 5% strain rate per minute, or
  • 30 ± 5 seconds to break (low elongation materials)

Execution

• Start test and record:
  • Maximum tensile force
  • Elongation at break
• Discard invalid results:
  • Breaks within 5 mm of jaws
  • Slippage or specimen damage

Measurement of Geotextiles Elongation Test

The geotextiles elongation test determines how much the material stretches under load.

• Measured using extensometers tracking reference points
• Expressed as percentage strain (%)
• Includes:
  • Strain at maximum force
  • Full force-elongation curve

Important: Accurate strain measurement requires no slippage and no specimen damage.

Key Parameters in ISO 10319

Parameter	Description
Tensile strength	Maximum force per unit width
Elongation	Extension at break (%)
Secant stiffness	Resistance to deformation
Strain rate	Controlled via crosshead speed
Gauge length	Initial reference length

These parameters form the basis for engineering design and quality control.

Equipment Requirements and Recommendations

A high-quality tensile tester is essential for compliance with ISO 10319.

Recommended Solution: Cell Instruments Tensile Tester

The TST-01 Tensile Tester from Cell Instruments provides a robust and precise platform for geotextiles tensile strength test and geotextiles elongation test.

Key advantages:

• PLC-controlled system with HMI for stable and intuitive operation
• Precision ball screw drive ensures consistent speed and displacement
• Wide speed range (1–500 mm/min) to meet ISO strain rate requirements
• High accuracy (0.5% FS) for reliable results
• Flexible fixtures for different geosynthetic materials
• Optional data output and software integration for reporting

This system supports repeatable, standards-compliant testing, making it suitable for laboratories, manufacturers, and inspection agencies.

Why ISO 10319 Matters for Quality Assurance

Implementing ISO 10319 ensures:

• Consistency in testing across laboratories
• Reliable comparison of material performance
• Better prediction of field behavior
• Compliance with international engineering specifications

For manufacturers and quality control teams, adopting this standard enhances credibility and product acceptance in global markets.

Practical Considerations for Accurate Testing

To ensure valid results:

• Use appropriate grips (capstan grips for high-strength materials)
• Avoid jaw-induced damage
• Test wet specimens within 3 minutes after removal
• Record all modifications in the test report

Attention to these details significantly improves reproducibility and data integrity.