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Sika® ViscoCrete®-20 HE PK

High Performance Superplasticizer 

Sika® ViscoCrete®-20 HE PK is a third generation superplasticizer for concrete and mortar. The product is suitable for tropical and hot climatic conditions.

Sika® ViscoCrete®-20 HE PK as a powerful superplasticizer acts by different mechanisms. Through surface adsorption and sterical effects separating the binder particles the following properties are achieved:
  • Pronounced increase in the early strength development, resulting in very economic stripping times for pre-cast and in situ concrete
  • Extremely powerful water reduction, resulting in high density, high strengths and reduced water permeability etc.
  • Excellent plasticizing effect, resulting in improved flowability, placing and compacting behavior
  • Reduced energy cost for steam cured pre-cast elements
  • Especially suitable for the production of Self Compacting Concrete (SCC)
  • Improved shrinkage and creep behavior
  • Reduced closure times for repairs of roads and runways
Sika® ViscoCrete®-20 HE PK does not contain chlorides or other ingredients which promote the corrosion of steel reinforcement. It is therefore suitable for reinforced and pre-stressed steel.
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Product Data Sheet Show all documents

Usage

Sika® ViscoCrete®-20 HE PK is especially suitable for the production of concrete mixes which require high early strength development, powerful water reduction and excellent flowability.  Sika® ViscoCrete®-20 HE PK is mainly used for the following applications:
  • Pre-cast concrete
  • Fast track concrete
  • In situ concrete requiring fast stripping time
  • Self Compacting Concrete (SCC)
 

Advantages

Sika® ViscoCrete®-20 HE PK as a powerful superplasticizer acts by different mechanisms. Through surface adsorption and sterical effects separating the binder particles the following properties are achieved:
  • Pronounced increase in the early strength development, resulting in very economic stripping times for pre-cast and in situ concrete
  • Extremely powerful water reduction, resulting in high density, high strengths and reduced water permeability etc.
  • Excellent plasticizing effect, resulting in improved flowability, placing and compacting behavior
  • Reduced energy cost for steam cured pre-cast elements
  • Especially suitable for the production of Self Compacting Concrete (SCC)
  • Improved shrinkage and creep behavior
  • Reduced closure times for repairs of roads and runways
Sika® ViscoCrete®-20 HE PK does not contain chlorides or other ingredients which promote the corrosion of steel reinforcement. It is therefore suitable for reinforced and pre-stressed steel.

Packaging

1000 ltr IBC

200 ltr drum

20 ltr plastic can

05 ltr jerry can

Bulk supply in tanker

Colour

Light brownish liquid, clear to slightly cloudy

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sika® ViscoCrete®-20 HE PK complies with the requirements for superplasticizers according to ASTM C494 Type F.

 
Product Information

Chemical Base

Aqueous solution of modified polycarboxylates

Shelf Life

12 months minimum from date of production if stored properly in original unopened packaging

Storage Conditions

The product must be stored properly in undamaged, unopened original sealed packaging in dry conditions at temperatures between +5° C and +35° C. Protect from direct sunlight and frost.

pH-Value

≥4

Total Chloride Ion Content

Nil (EN 934-2)

Specific gravity

1.11 ± 0.03

Application

Application Information

Compatibility

Sika® ViscoCrete®-20 HE PK may by combined with the following Sika Products among others:

  • Sika Pump

  • Sika Ferrogard-901

  • Sika Fume

  • Sika Rapid

  • Sika Stabilizer-229

  • Sika Retarder and Sika Retardol 25

Trials are always recommended before combining products.

Dispensing

 Sika® ViscoCrete®-20 HE PK is added to the gauging water or added with it into the concrete mixer. For optimum utilization of the high water reduction property we recommend thorough mixing at a minimal wet mixing time of 60 seconds.
Consumption

Recommended Dosage

For medium workability: 0.2-0.8% by weight of cement

For concrete of high workability, very low water/cement ratio and for Self Compacting Concrete: 1.0 – 2.0% by weight of cement.

It is advisable to carry out trial mixes to establish the correct dosage.
Application steps

CLEANING OF TOOLS

Clean all equipment and tools with water immediately after use.

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