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    Cement Standards

    IS 8041:1990

    Rapid Hardening Portland Cement

    Edition: 2nd RevisionYear: 1990Pages: 10

    About this code

    Specification for RHC, designed for high early strength. Used for road repairs, precast, and emergency works where 1-day strength matters.

    Key sections

    1. 01Scope
    2. 02Composition
    3. 03Physical requirements
    4. 04Marking

    Critical clauses

    Clause 6.0Early Strength

    Min 16 MPa at 1 day, 27 MPa at 3 days.

    In practiceForm-stripping possible in 12-18 hours.

    Practical implications

    For specifiers

    Only for emergency/precast.

    For suppliers

    Limited availability.

    For executors

    Cure aggressively due to heat.

    FAQs

    Where is RHC used in Bangalore?

    Rare — mostly road patching and precast. Most fast-track now uses OPC 53 + accelerator.

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