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IS 14710 Part 1 : 2020Geosynthetics - Geogrids - General Characteristics and Methods of Test

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ISO 10319 · ASTM D6637 / D6637M - 18 · ISO 10321
CurrentSpecializedTesting MethodBIMGeotechnical · Geosynthetics and Ground Improvement
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OverviewValues6InternationalTablesFAQ4

IS 14710:2020 Part 1 is the Indian Standard (BIS) for geosynthetics - geogrids - general characteristics and methods of test. This standard outlines the general characteristics and standardized laboratory test methods for evaluating geogrids used in geotechnical applications. It provides procedures for determining key performance indicators such as wide-width tensile strength, junction strength, installation damage resistance, and creep. This code is essential for quality assurance, product comparison, and providing input data for geotechnical design.

Specifies general characteristics, terminology, sampling and methods of test for geogrids.

Overview

Status
Current
Usage level
Specialized
Domain
Geotechnical — Geosynthetics and Ground Improvement
Type
Testing Method
International equivalents
ISO 10319:2015 · ISO (International Organization for Standardization)ASTM D6637 / D6637M - 18 · ASTM International (USA)ISO 10321:2018 · ISO (International Organization for Standardization)ASTM D5262 - 18 · ASTM International (USA)
Also on InfraLens for IS 14710
6Key values3Tables4FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes
! The wide-width tensile test (Annex A) is critical as it better represents in-situ stress conditions for geogrids compared to narrow strip tests.
! Ensure proper specimen clamping to prevent slippage, a common source of error that yields artificially low strength results.
! Installation damage resistance (Annex C) is a vital test simulating the effect of backfill placement and compaction, which directly impacts the geogrid's long-term design strength.
Frequently referenced clauses
Cl. 4Characteristics and RequirementsCl. 5Test MethodsAnnex A - Tensile Properties using Wide-Width Strip MethodAnnex B - Tensile Strength of Joints/JunctionsAnnex C - Assessment of Resistance to Installation DamageAnnex D - Test Method for Determining the Creep Behaviour
Pulled from IS 14710:2020. Browse the full clause & table index below in Tables & Referenced Sections.
geosyntheticsgeogridspolymerspolypropylenepolyesterHDPE

International Equivalents

Similar International Standards
ISO 10319:2015ISO (International Organization for Standardization)
HighCurrent
Geosynthetics — Wide-width tensile test
Defines the primary test method for tensile strength, which IS 14710 references via IS 13326 (Part 1).
ASTM D6637 / D6637M - 18ASTM International (USA)
MediumCurrent
Standard Test Method for Determining Tensile Properties of Geogrids by the Single Rib Tensile Method
Provides an alternative method for tensile testing focused on individual ribs, whereas IS 14710 focuses on wide-width.
ISO 10321:2018ISO (International Organization for Standardization)
HighCurrent
Geosynthetics — Tensile test for joints/seams
Corresponds directly to the junction strength test method described in Annex B of IS 14710.
ASTM D5262 - 18ASTM International (USA)
HighCurrent
Standard Test Method for Evaluating the Unconfined Tension Creep and Creep Rupture Behavior of Geosynthetics
Defines the methodology for creep testing, which IS 14710 refers to via IS 16990.
Key Differences
≠IS 14710 is an umbrella specification covering multiple characteristics (tensile, junction, creep, durability) in one document, whereas ISO and ASTM standards typically address each test method in a separate, dedicated standard (e.g., ISO 10319 for tensile, ISO 10321 for junctions).
≠The standard atmosphere for conditioning and testing specimens in IS 14710 is 27 ± 2 °C and 65 ± 5% RH, which is common for the Indian subcontinent, differing from the 23 ± 2 °C and 50 ± 10% RH specified in ISO 10319 or 21 ± 2 °C and 65 ± 5% RH in ASTM D6776.
≠IS 14710 mandates classification based on tensile strength using the wide-width method (IS 13326), while ASTM provides both a wide-width method (D4595) and a widely used single-rib tensile test (D6637) which tests a different property.
≠IS 14710 provides a specific classification system for geogrids (e.g., GG1, GG2, etc.) based on material type (PET, PP) and ultimate tensile strength, which is unique to the Indian standard.
Key Similarities
≈The core methodology for determining ultimate tensile strength is based on the wide-width tensile test, using a constant rate of extension (CRE) machine, which is harmonized with ISO 10319.
≈All standards recognize the same set of critical performance characteristics for geogrids: tensile strength, junction strength/efficiency, long-term creep behavior, and durability (UV and chemical resistance).
≈The principle for determining junction strength, which involves isolating and pulling a single junction to failure, is conceptually identical between Annex B of IS 14710 and the method in ISO 10321.
≈Fundamental physical properties like mass per unit area, rib thickness, and aperture size are measured and reported in a similar manner across IS, ISO, and ASTM standards as basic index properties.
Parameter Comparison
ParameterIS ValueInternationalSource
Primary Tensile Test MethodWide-width tensile test as per IS 13326 (Part 1)Wide-width tensile testISO 10319:2015
Specimen Width (Wide-Width Test)200 mm200 mmISO 10319:2015
Standard Conditioning Temperature27 ± 2 °C23 ± 2 °CISO 10319:2015
Standard Conditioning Humidity65 ± 5 % RH50 ± 10 % RHISO 10319:2015
Junction Strength Test MethodMethod specified in Annex BSingle junction test methodISO 10321:2018
Single Rib Tensile TestInformative test method provided in Annex CA normative standard test methodASTM D6637/D6637M - 18
UV Resistance Test Duration500 hours exposure to retain ≥ 90% strengthDuration is not specified in the test method; it's set by the product specification or project requirement.ISO 12224 / ASTM D4355
⚠ Verify details from original standards before use

Key Values6

Quick Reference Values
Standard conditioning temperature27 ± 2 °C
Standard conditioning relative humidity65 ± 5 % RH
Specimen width for wide-width tensile test200 mm
Strain rate for wide-width tensile test10 ± 3 %/min
Minimum specimens for wide-width test5 per direction
Minimum gauge length for tensile test100 mm
Key Formulas
Tensile Strength (T) = F_peak / W — where F_peak is peak load, W is initial specimen width
Strain (ε) = (ΔL / L₀) × 100% — where ΔL is extension, L₀ is initial gauge length

Tables & Referenced Sections

Key Tables
Table 1 - List of Characteristics and Test Methods
Table A.1 - Test Parameters for Wide-Width Tensile Test
Table C.1 - Grading of Fill Material for Installation Damage Test
Key Clauses
Clause 4 - Characteristics and Requirements
Clause 5 - Test Methods
Annex A - Tensile Properties using Wide-Width Strip Method
Annex B - Tensile Strength of Joints/Junctions
Annex C - Assessment of Resistance to Installation Damage
Annex D - Test Method for Determining the Creep Behaviour

Frequently Asked Questions4

What is the main test for geogrid strength specified in this standard?+
The wide-width tensile test as per Annex A, which determines the peak tensile strength (in kN/m) and strain characteristics.
Does this standard provide design values for geogrids?+
No, it is a testing standard that provides methods to determine characteristic properties. Engineers must apply appropriate reduction factors to these values to derive a long-term design strength.
How is the strength of the geogrid's 'knots' or 'junctions' tested?+
The tensile strength of joints and junctions is determined using the method described in Annex B.
Is this standard applicable to all types of geogrids?+
Yes, it is intended for all types of geogrids, including woven, knitted, extruded, and bonded types, used for reinforcement.

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