Product Data Sheet Show all documents

Sika® ViscoCrete®-8900

ULTRA HIGH RANGE WATER REDUCER WITH HARDENING ACCELERATION EFFECT CONCRETE ADMIXTURE

Sika® ViscoCrete®-8900 is a 3rd generation polymer based high performance superplasticizer with hardening acceleration effect for concrete.
Sika® ViscoCrete®-8900 meets requrement of ASTM C494 type F.

Sika® ViscoCrete®-8900 combines different modes of actions. By adsorption on the surface of the fines and keeping them apart while the hydration is in progress, Sika® ViscoCrete®-8900 effects the following concrete properties:
  • Extremely high water reduction (enhanced impermeability & strength of concrete produced)
  • Faster development of early strength. Can reduce the time of steam curing process for getting early strength
  • Workability can be maintained up to 90 minutes (depending on cement type, temperature and mix design)
  • Improved creep and shrinkage resistance characteristics
Product Data Sheet Show all documents

Usage

Sika® ViscoCrete®-8900 is mainly suitable for the manufacture of concrete in precast factories and other in-situ precast concrete elements.
Sika® ViscoCrete®-8900 is used for the following types of concrete:
  • High early strength/high performance precast concrete square pile
  • Concrete with extreme water reduction
  • Soft consistency concrete with extended working time, suitable for sheet pile, girder and high strength concrete pipe
 

Advantages

Sika® ViscoCrete®-8900 combines different modes of actions. By adsorption on the surface of the fines and keeping them apart while the hydration is in progress, Sika® ViscoCrete®-8900 effects the following concrete properties:
  • Extremely high water reduction (enhanced impermeability & strength of concrete produced)
  • Faster development of early strength. Can reduce the time of steam curing process for getting early strength
  • Workability can be maintained up to 90 minutes (depending on cement type, temperature and mix design)
  • Improved creep and shrinkage resistance characteristics

Packaging

200/1000 L

Colour

Liquid/Brown

Product Details

Product Information

Chemical base

Modified Poly carboxylate in water

Shelf life

12 months if stored properly in original unopened packaging.

Storage conditions

Stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +30 °C.

Density

1.115–1.130 kg/l

(At 20°C)

pH-Value

4.00–6.00

(At 25°C)
Technical Information

Concreting Guidance

Concrete placing: With the use of Sika® ViscoCrete®-8900, concrete of highest quality is being produced, however state of the art concrete technology, such as mixing, placing vibrating and curing must be respected and applied.
Curing: Effective measures for concrete curing must be followed

Specific Advice

Sika® ViscoCrete®-8900 is added to the gauging water prior to its addition to the dry mix or added separately to the wetted concrete mix.
For optimum utilization of the ultra-high range water reducer we recommend a minimum wet mixing time of 60 seconds.
When adding the balance of the batching water to adjust concrete consistency this should be done after a minimum of 2/3 of the wet mixing time to avoid surplus water in the concrete.

Application

Application Information

Compatibility

Sika® ViscoCrete®-8900 may be combined with all Sikament, Sika® Aer, Sika®Pump, Sikacrete® PP-1 products, but must be added separately to the mix and not pre-mixed prior its addition.
Sika® ViscoCrete®-8900 is compatible with all Portland Cement types.
Consumption

Recommended Dosage

0.5 – 2.0 L per 100 kg of cement/binder
Typical dosage: 0.7 – 1.2 L per 100 kg of cement/binder

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