What is the primary purpose of this standard?

To provide standardized methods for testing the strength (abrasion, impact, crushing) and durability (soundness) of recycled aggregates.

Does this standard give acceptable limits for the test values?

No, this is a testing method standard. It only specifies how to perform the tests. Acceptable limits are provided in material specification codes like IS 383 or in project-specific requirements.

What does the 'Aggregate Abrasion Value' test signify?

It indicates the aggregate's resistance to wear and abrasion, which is crucial for applications like road surfaces and floor screeds. The test is performed using the Los Angeles machine (Clause 4).

How does this Part 2 relate to Part 1 of IS 17354?

Part 1 covers methods for determining physical properties like particle size distribution, water absorption, density, and flakiness index, while Part 2 covers mechanical properties and durability.

IS 17354 Part 1

: 2020

Methods of Test for Recycled Aggregates - Part 1: Density, Water Absorption, Percentage of Crushed Particles and Material Finer than 75 Micron Sieve

CurrentSpecializedTesting MethodMaterials Science · Aggregates and Sand

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This standard outlines the laboratory test methods for determining the mechanical and durability properties of recycled aggregates from construction and demolition waste. It details procedures for measuring abrasion value, impact value, crushing value, and soundness to assess their suitability for use in construction.

Describes methods for determining density, water absorption, percentage of crushed particles, and material finer than 75-micron sieve for recycled aggregates.

Quick Reference Values

Los Angeles machine speed30 to 33 rev/min

Impact test hammer weight13.5 to 14.0 kg

Impact test hammer free fall height380 ± 5 mm

Number of blows for impact test15

Crushing test load40 tonnes

Crushing test loading rate4 tonnes/minute

Soundness test immersion cycles5 cycles

Key Formulas

Aggregate Abrasion Value (%) = (W1 - W2) / W1 * 100

Aggregate Impact Value (%) = (W2 / W1) * 100

Aggregate Crushing Value (%) = (W2 / W1) * 100

Soundness Loss (%) = ((W1 - W2) / W1) * 100

Practical Notes

The test procedures are largely adapted from IS 2386 (Part 4) which is for natural aggregates; however, this standard accounts for the specific characteristics of recycled materials.

Accurate and representative sampling as per IS 2430 is critical due to the inherent heterogeneity of recycled aggregates.

Test results from this standard are essential inputs for designing concrete mixes with recycled aggregates as per guidelines like IS 10262 and for checking conformity with IS 383.