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    Testing Standards

    IS 1199 (Part 2):2018

    Fresh Concrete - Slump Test

    Edition: Latest RevisionYear: 2018Pages: 12

    About this code

    Specifies the slump cone test procedure — apparatus, filling, lifting, measurement, and types of slump (true, shear, collapse).

    Key sections

    1. 01Apparatus
    2. 02Procedure
    3. 03Recording results
    4. 04Interpretation

    Critical clauses

    Clause 5.0Procedure

    3 layers, 25 strokes each, lift cone in 5-10s.

    In practiceInconsistent stroking is the #1 source of error.

    Clause 6.0Slump Types

    True, shear, collapse — repeat if shear/collapse.

    In practiceShear = mix not cohesive enough.

    Practical implications

    For specifiers

    Specify slump in tender.

    For suppliers

    Monitor slump retention.

    For executors

    Test at point of placement.

    FAQs

    Acceptable slump tolerance?

    ±25mm of specified per IS 456 clause 6.2.

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