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IS 13325:2018 Part 1 is the Indian Standard (BIS) for geosynthetics - geotextiles - general. This standard (Part 1) provides general guidelines on geosynthetics, specifically focusing on geotextiles. It defines key terminology, classifies geotextiles based on their manufacturing process, and outlines their principal functions such as separation, reinforcement, filtration, drainage, and protection. This code is the foundational document for selecting, specifying, and testing geotextiles in India.
Covers general requirements, terminology, sampling and designation of geotextiles.
Overview
Status
Current
Usage level
Frequently Used
Domain
Geotechnical — Geosynthetics and Ground Improvement
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This part defines *what* properties to specify for a geotextile; it does not provide the actual design values. The required performance values must be determined by the design engineer based on site-specific analysis.
! When specifying a geotextile, clearly state the primary function(s) required (e.g., separation, reinforcement) as this dictates which properties (tensile strength, AOS, permittivity, etc.) are critical for quality control and acceptance.
! Always cross-reference the relevant parts of IS 13325 for the standardized test methods to verify properties claimed on a manufacturer's technical data sheet.
ISO 10318-1:2015ISO (International Organization for Standardization)
HighCurrent
Geosynthetics — Part 1: Terms and definitions
Both standards provide the fundamental terms and definitions used in the geotextile industry.
ASTM D4439 - 21ASTM International (USA)
HighCurrent
Standard Terminology for Geosynthetics
Both serve as the primary terminology and classification documents for their respective regions.
EN ISO 10318-1:2015CEN (European Committee for Standardization)
HighCurrent
Geosynthetics - Part 1: Terms and definitions (CEN adoption of ISO 10318-1)
The European adoption of the core ISO terminology standard, aligning directly with the IS code's purpose.
ISO 10320:2019ISO (International Organization for Standardization)
MediumCurrent
Geosynthetics — Identification on site
Covers requirements for marking and identification, which is a key section within the broader IS 13325.
Key Differences
≠IS 13325 consolidates terms, classification, and identification requirements into a single document, whereas the ISO system separates these into multiple standards (e.g., ISO 10318 for terms, ISO 10320 for identification).
≠The Indian standard exclusively references other Indian Standards (IS codes) for test methods, while international standards reference corresponding ISO or ASTM test methods. This creates a practical divergence in testing protocols.
≠While fundamental classifications are similar (woven, nonwoven), IS 13325 may include examples or sub-classifications that reflect materials and practices more common in the Indian market.
≠IS 13325 does not specify performance requirements for CE marking, which is a mandatory aspect for products sold in the European Economic Area and is governed by related EN standards.
Key Similarities
≈The core definitions for key terms like 'geotextile', 'geocomposite', 'woven', 'nonwoven', and polymer types (PP, PET) are harmonized with ISO 10318-1.
≈Both the IS code and its international counterparts recognize and define the same primary functions of geotextiles: separation, filtration, drainage, reinforcement, and protection.
≈The basis for classification is identical, focusing on the manufacturing method (e.g., woven, non-woven needle-punched, non-woven heat-bonded) and the constituent polymer.
≈Both IS 13325 and ISO 10320 mandate similar requirements for product identification on rolls, including manufacturer's name, product type/code, and batch/lot number for traceability.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Terminology Reference
IS 13325:2018
ISO 10318-1
ISO 10318-1:2015
Referenced Tensile Strength Test
IS 13162 (Part 2) / IS 1969
ISO 10319
ISO 10319:2015
Referenced Puncture Resistance Test (CBR)
IS 13162 (Part 3)
ISO 12236
ISO 12236:2006
Referenced Water Permeability Test (Perpendicular)
IS 13162 (Part 4)
ISO 11058
ISO 11058:2019
Referenced Apparent Opening Size (AOS) Test
IS 13162 (Part 5)
ISO 12956
ISO 12956:2010
Definition of 'Geotextile'
A planar, permeable, polymeric textile material...used in contact with soil/rock...
A planar, permeable, polymeric textile material...used in contact with soil and/or other materials in geotechnical and civil engineering applications.
ISO 10318-1:2015
On-Site Identification Requirement
Requires Manufacturer, Product type, Batch No., etc. on label/roll.
Requires Manufacturer, Product Name/Code, Batch No., etc. on label/roll.
ISO 10320:2019
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Key property for ReinforcementTensile Strength (kN/m)
Key property for FiltrationApparent Opening Size (O95) (microns or mm)
Key property for in-plane DrainageTransmissivity (m²/s)
Key property for cross-plane DrainagePermittivity (s⁻¹)
Key property for SurvivabilityPuncture Resistance (N)
Key property for SeparationMass per unit area (g/m²)
Tables & Referenced Sections
Key Tables
Table 1 - Functions of Geotextiles
Table 2 - Classification of Geotextiles based on Manufacturing Process
What are the main functions of a geotextile as per this code?+
The five main functions are Separation, Reinforcement, Filtration, Drainage, and Protection (Clause 6 and Table 1).
How does this IS code classify geotextiles?+
It classifies them primarily by their manufacturing process into three main categories: woven, non-woven, and knitted (Clause 4).
Does this standard give minimum strength values for geotextiles used in roads?+
No, this is a general specification. Project-specific codes like IRC:SP:59 should be consulted for minimum values in road applications.
What is the difference between permittivity and transmissivity?+
Permittivity relates to the water flow across the plane of the geotextile (cross-plane flow), while Transmissivity relates to the water flow within the plane of the geotextile (in-plane flow) (Clause 3.2.3).