1. Summary about Geotextiles Used in Sub-grade Stabilisation in Pavement Structures

These geotextiles are used to improve the bearing capacity of weak sub-grade soils in pavement structures. They enhance load distribution, reduce rutting, and increase the overall service life of roads and pavements.

2. Why BIS Certificate is Mandatory for Geotextiles Used in Sub-grade Stabilisation

BIS certification is mandatory because sub-grade stabilisation directly affects pavement performance and safety. Substandard geotextiles can lead to premature pavement failure.

3. What is BIS Certified for Geotextiles Used in Sub-grade Stabilisation in Pavement Structures

BIS certification confirms conformity with the applicable Indian Standard issued by the :contentReference[oaicite:0]{index=0} through testing of tensile strength, elongation, permeability, and durability.

Tests required for Geotextiles Used in Sub-grade Stabilisation in Pavement Structures

Index properties

Title	Mandatory/Optional
Type of geotextile	Required
Roll Length	Required
Roll Width	Required
Grab Strength	Required
Sewn Seam Strength	Required
Trapezoidal Tear Strength	Required
CBR Puncture Strength
Abrasion Strength

Durability Properties

Title	Mandatory/Optional
Resistance	Optional
Ultraviolet stability at 500h, Retained strength, Percent of original strength	Optional

Requirements of Geotextiles for Subsurface Drainage Applications, Subgrade Separation Applications, Subgrade Stabilization Applications & Erosion Control Application in Hard Armor Systems

Title	Mandatory/Optional
Geotextile class
Permittivity	Optional
Apparent Opening Size	Optional

Requirements of Geotextiles for Separation/Filtration Applications

Title	Mandatory/Optional
Type of geotextile	Required
Roll Length	Required
Roll Width	Required
Grab Strength	Required
Elongation at break	Required
Trapezoidal Tear Strength	Required
CBR Puncture Strength	Required