What is the purpose of the stripping value test?

To assess the adhesion between a bituminous binder and an aggregate in the presence of water, indicating the pavement's potential resistance to moisture damage.

What are the standard test conditions?

Coated aggregates are immersed in a water bath at 40°C for 24 hours (Clause 6.2).

How is the stripping value reported?

It is reported as the visually estimated percentage of the aggregate surface area that is stripped of the binder (Clause 7).

What aggregate size is used for the test?

The fraction of aggregate passing the 20 mm IS Sieve and retained on the 10 mm IS Sieve is used (Clause 5.2).

IS 6241

: 1971

Method of Test for Determination of Stripping Value of Road Aggregates

CurrentFrequently UsedTesting MethodTransportation · Stones

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This standard specifies the method for determining the stripping value of aggregates used in road construction. The test assesses the adhesion of a standard bituminous binder to pre-coated aggregates after immersion in water, which helps predict the material's resistance to moisture-induced damage.

Method of Test for Determination of Stripping Value of Road Aggregates

Quick Reference Values

Test Temperature40 °C

Immersion Duration24 hours

Binder Content for Coating5% by weight of aggregate

Aggregate Size FractionPassing 20 mm IS Sieve and retained on 10 mm IS Sieve

Typical Acceptance Limit (as per MoRTH)<5% stripping

Practical Notes

The result is based on visual estimation and can be subjective. It's crucial to have an experienced technician and consistent lighting for repeatable results.

This standard does not specify the stripping value limit. The acceptable limit (commonly <5%) is typically defined in project-specific documents or codes like MoRTH specifications.

This is a static test. For a more comprehensive evaluation of moisture susceptibility, dynamic tests like the Rolling Bottle Test or AASHTO T 283 are often performed.