Product Data Sheet Safety Data Sheet Show all documents
SikaTard®-930

SikaTard®-930

Set retarding/stabilising admixture

SikaTard®-930 is an admixture in liquid form developed for the control of cement hydration. SikaTard® 930 stabilises concrete mixes without setting for extended periods and without negatively influencing their quality.

  • SikaTard®-930 blocks cement hydration. This is in contrast to other stabilisers or retarders, which only retard hydration of the cement.
  • The effect of SikaTard®-930 may be immediately stopped when Sika® Sigunit® is used as an accelerator. Thus hydration of the previously stabilised shotcrete will start immediately.
  • SikaTard®-930 does not contain chlorides or any other steel corrosion promoting materials. It can therefore be used in steel reinforced concrete construction without restriction.
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Product Data Sheet Safety Data Sheet Show all documents

Usage

SikaTard®-930 is can be used in a variety of materials including readymixed concrete and both wet and dry spray shotcrete, where cement hydration of the concrete mix is halted for a required amount of time. It is possible to retard/stabilise mixed concrete for a period of anything from hours to days.  

Advantages

  • SikaTard®-930 blocks cement hydration. This is in contrast to other stabilisers or retarders, which only retard hydration of the cement.
  • The effect of SikaTard®-930 may be immediately stopped when Sika® Sigunit® is used as an accelerator. Thus hydration of the previously stabilised shotcrete will start immediately.
  • SikaTard®-930 does not contain chlorides or any other steel corrosion promoting materials. It can therefore be used in steel reinforced concrete construction without restriction.

Packaging

200 litre drum, 1000 litre IBC

Colour

liquid, colourless

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Conforms to the requirements of BS EN 934-2 Table 8

DoP 27939390, certified by Factory Production Control Body 1029 and provided with the CE mark
DoP 71982566, certified by Factory Production Control Body 0120 and provided with the UKCA mark
Product Information

Chemical Base

Aqueous solution of polycarbonic acid salts

Shelf Life

12 months from date of production if stored in original, undamaged and sealed containers.

Storage Conditions

Protected from direct sunlight at temperatures between 5°C and 25°C. Use clean containers when delivered in bulk.

Density

1.2 kg/L

pH-Value

3.0 +/- 1.0

Total Chloride Ion Content

<0.1%

Equivalent Sodium Oxide

<2.7%

Application

Consumption

Recommended Dosage

SikaTard®-930 is normally used at between 0.4 % to 3 % by weight of cement and added at the batching plant. The following table shows the approximate retarded stabilisation times at various dosages.

SikaTard®-930 dosageStabilization time in hours
0.4%

~8

0.6%

~10

0.8%~15
1.0%~20
1.2%~25
1.4%~30
1.6%~40
1.8%~60
2.0%~75

The table is to be used as guideline only - for specific stabilisation periods, trials with the actual cement are essential.
SikaTard®-930 is added to the mix at the batching plant.

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