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    Cement Standards

    IS 6452:1989

    High Alumina Cement for Structural Use

    Edition: 1st RevisionYear: 1989Pages: 14

    About this code

    Specification for calcium aluminate cement. Very high early strength and chemical resistance, but prone to conversion-related strength loss in warm humid conditions.

    Key sections

    1. 01Scope
    2. 02Chemical composition
    3. 03Physical requirements
    4. 04Restrictions on use

    Critical clauses

    Clause 5.0Composition

    Calcium aluminate-rich; not Portland.

    In practiceCannot mix with OPC.

    Clause 7.0Use Restrictions

    Not recommended for structural concrete in tropical climates.

    In practiceUse only in refractory or chemically aggressive industrial floors.

    Practical implications

    For specifiers

    Refractory, chemical floors only.

    For suppliers

    Specialty product.

    For executors

    Strict batching control required.

    FAQs

    Why avoid HAC in Bangalore?

    Conversion in warm humid conditions causes long-term strength loss.

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