Retarders/Set Controllers
Sika® Retarder liquid
Set Retarding Concrete Admixture
Use
- Large volume pours.
- Avoidance of cold joints.
- Construction joints without formwork.
- Long hauls.
- Difficult placing conditions.
- Elevated temperatures.
- Revibrated concrete.
Coverage / Usage Approx: 0.2 -2.0% by weight of cement
Characteristics and Advantages
- Controlled setting time.
- Chloride free- does not attack reinforcement.
Colour
YellowishPackaging
25 litre
200 litre
Product Data Sheet
Sika RetarderSikaTard®-930
Set Retarding Concrete Admixture
Use
- Used in wet and dry spray shotcrete where cement hydration of the concrete mix is prevented until it is required. It is therefore possible to stabilise mixed concrete for hours or even days i.e. in tunnelling work.
Coverage / Usage Approx: 0.2 -3.0% by weight of cement
Characteristics and Advantages
- Block cement hydration. This is in contrast to other stabilisers or ratarders, which only retard hydration of the cement.
- The effect of SikaTard®-930 may be immediately stopped when 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.
Colour
Colourless liquidPackaging
200 litre
1000 litre