Product Data Sheet Show all documents

SikaRapid®-2

Set accelerating admixture

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

    SikaRapid®-2 provides the following advantages through accelerated set and hardening of the concrete:
    When applied with a HRWR/Superplasticiser, SikaRapid®-2 will not change 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
    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.  
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    Product Data Sheet Show all documents

    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.
    SikaRapid®-2 is mainly used for the following applications:

    Precast concrete
    Prestressed concrete
    Cold ambient temperatures to achieve sufficient strength gain
    Ready- mixed concrete where minimum time delays are critical  

    Advantages

    SikaRapid®-2 provides the following advantages through accelerated set and hardening of the concrete:
    When applied with a HRWR/Superplasticiser, SikaRapid®-2 will not change 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
    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.  

    Packaging

    25 litre drum, 200 litre drum, 1000 litre IBC

    Colour

    Clear yellow liquid

    Product Details

    Sustainability / Certifications / Approvals

    APPROVALS / STANDARDS

    Conforms to the requirements of BS EN 934-2 Table 6
    DoP 02 14 02 02 100 0 000005 1088, certified by Factory Production Control Body 0086, Certificate 541325, and provided with the CE 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

    pH-Value

    8.5 +/- 1.0

    Total Chloride Ion Content

    <0.1%

    Equivalent Sodium Oxide

    <2.0%
    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

    Restrictions

    SikaRapid®-2 shall not be added to dry cement

    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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