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    Testing Standards

    IS 13311 (Part 1):1992

    Non-Destructive Testing - Ultrasonic Pulse Velocity

    Edition: 1st EditionYear: 1992Pages: 16

    About this code

    Procedure for UPV testing of concrete — equipment, calibration, measurement modes, and quality classification based on velocity.

    Key sections

    1. 01Apparatus
    2. 02Calibration
    3. 03Measurement
    4. 04Interpretation

    Critical clauses

    Clause 5.0Velocity Classification

    >4.5 km/s excellent; 3.5-4.5 good; <3 doubtful.

    In practiceCross-check with rebound hammer.

    Practical implications

    For specifiers

    For investigation, not acceptance.

    For suppliers

    Lab service.

    For executors

    NDT for diagnostic only.

    FAQs

    Can UPV measure strength?

    Indirectly — needs site-specific calibration with cores.

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