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    KnowledgeGlossaryAggregate Impact Value (AIV)
    Aggregates & Materials

    Aggregate Impact Value (AIV)

    // Definition

    A test measuring the resistance of aggregate to sudden shock or impact. Lower values indicate stronger aggregate.

    For wearing surfaces, AIV ≤ 30%. For other concrete, ≤ 45%. Tested per IS 2386 Part 4.

    // Related Indian Standards
    IS 2386
    // Cross-references
    Coarse Aggregate

    Aggregate retained on the 4.75 mm IS sieve. Forms the bulk of concrete volume (60-75%) and provides dimensional stability.

    Specific Gravity

    The ratio of the density of an aggregate to the density of water. Used in mix design to convert weights to volumes.

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