Product Data Sheet Show all documents
SikaRapid®-2

SikaRapid®-2

Set Accelerating Admixture for Concrete

SikaRapid®-2 is a low alkali, chloride free liquid set accelerator for concrete and mortar which promotes early strength development without negatively influencing final strengths.

    SikaRapid®-2 does not contain chlorides or any other ingredients which promote the corrosion of steel. It is therefore suitable for use in reinforced and prestressed concrete structures.   SikaRapid®-2 provides the following advantages through accelerated set and hardening of the concrete:
    • When applied with a HRWR/Superplasticiser, SikaRapid®-2 will have minimal effect on the fresh concrete properties
    • Faster turnaround of formwork in precast applications
    • Reduced or eliminated heat or steam curing
    • Continuous concreting at low temperatures
    • No negative effects on the final strengths
    Product Data Sheet Show all documents

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    Usage

    SikaRapid®-2 is especially suitable for any application where fast early set and strength development plays a major role, or is of crucial importance within 6 to 24 hours.  Typical applications include:
    • Precast concrete
    • Prestressed concrete
    • Making concrete in cold ambient temperatures
    • Speeding up construction schedule

    Advantages

    SikaRapid®-2 does not contain chlorides or any other ingredients which promote the corrosion of steel. It is therefore suitable for use in reinforced and prestressed concrete structures.   SikaRapid®-2 provides the following advantages through accelerated set and hardening of the concrete:
    • When applied with a HRWR/Superplasticiser, SikaRapid®-2 will have minimal effect on the fresh concrete properties
    • Faster turnaround of formwork in precast applications
    • Reduced or eliminated heat or steam curing
    • Continuous concreting at low temperatures
    • No negative effects on the final strengths

    Packaging

    25 L drum, 200 L drum and 1000 L IBC

    Colour

    Clear yellow liquid

    Product Details

    Sustainability / Certifications / Approvals

    APPROVALS / STANDARDS

    Conforms to the requirements of BS EN 934-2 Table 6
    DoP 93209815 certified by Factory Production Control Body 1029 and provided with the CE Mark
    DoC 10690286 certified by Factory Production Control Body 0120 and provided with the UKCA Mark
    Product Information

    Chemical Base

    Mixture of organic and inorganic complex agents

    Shelf Life

    12 months in original unopened containers

    Storage Conditions

    Stored in cool dry conditions between 5 °C and 25 °C protected from direct sun light and freezing

    Density

    1.37 kg/L

    Total Chloride Ion Content

    <0.1 % w/w (chloride free)

    Equivalent Sodium Oxide

    <2.0 % w/w (alkali free)
    System information

    Compatibility

    SikaRapid®-2 may be combined with many other Sika products.
    Important: Always conduct trials before combining products in specific mixes and contact our Technical Service Department for information and advice about any specific combinations.
    Technical Information

    Concreting guidance

    The standard rules of good concreting practice concerning production and placing shall be followed.  Laboratory trials shall be carried out before hand, especially when suing a new mix design or producing new concrete components.  Fresh concrete shall be cured according to recognised techniques and applied as early as possible.

    Application

    Application Information

    DISPENSING

    SikaRapid®-2 is added to the guaging water or added simultaneously with the guaging water into the concrete mixer.

    It is also possible to add SikaRapid®-2 to the basic concrete carried in a transit mixer at the place of discharge.  In this case, an additional mixing time of 1 minute per m3 of concrete must be observed.  The concrete shall be checked for uniform consistency prior to discharge from a transit mixer.

     
    Consumption

    Recommended Dosage

    0.5–3.0 % by weight of cement

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