Product Data Sheet Show all documents

Sika® ViscoCrete®-20 ET

High Range Water Reducer / Superplasticizer and Retarding Admixture

Sika® ViscoCrete®-20 ET is a liquid admixture for concrete and mortar which is used as high range water reducer/ superplasticizer and retarding admixture. Sika® ViscoCrete®-20 ET is designed to work on a combination of electrostatic adsorption and steric repulsion effects allowing solid particles to be effectively dispersed. Therefore, a high level of fluidity and plasticizing can be reached with a high-water reduction which provides many advantages. Suitable for use in tropical and hot climatic conditions.

  • High water reduction
  • High final density and strength properties
  • Reduced shrinkage, creep, water permeability, etc
  • Improved flowability, placing and compacting behaviour
  • Improved surface finish
  • Increased early strength development
  • Early removal of formwork
  • Reduced curing
  • Does not contain chlorides
  • Suitable for use in reinforced and pre-stressed concrete
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Product Data Sheet Show all documents

Usage

Production of concrete mixes which require high early strength development, powerful water reduction and improved flowability.
  • Precast concrete
  • Fast-track concrete
  • In situ concrete requiring fast stripping time
  • Self-Compacting Concrete (SCC)
 

Advantages

  • High water reduction
  • High final density and strength properties
  • Reduced shrinkage, creep, water permeability, etc
  • Improved flowability, placing and compacting behaviour
  • Improved surface finish
  • Increased early strength development
  • Early removal of formwork
  • Reduced curing
  • Does not contain chlorides
  • Suitable for use in reinforced and pre-stressed concrete

Packaging

  • 1,000liter IBC tanker
  • 200liter drum

Colour

Dark brown liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Sika® ViscoCrete®-20 ET follows the requirements of ASTM C494; Type G and EN 934-2.
Product Information

Composition

Aqueous solution of modified polycarboxylates

Shelf life

12 months from date of production

Storage conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10 °C and +45 °C. Always refer to packaging.

Density

1.12 ± 0.03 kg/liter

Viscosity

~145 mPa.s (+23 °C)

pH-Value

4.5 ± 1

Total chloride ion content

< 0.1%

Equivalent sodium oxide

≤ 2.0%
Technical Information

Concreting guidance

The standard rules of good concreting practice, concerning production and placing are to be followed.

Laboratory trials must be carried out before concreting on site, especially when using a new mix design or producing new concrete components.

Fresh concrete must be cured properly, and curing must be applied as early as possible.

Application

Application Information

Dispensing

Sika® ViscoCrete®-20 ET is added to the gauging water or added with it into the concrete mixer.

To achieve the optimum performance, a wet mixing time of at least 60 seconds is recommended.

To avoid excess water in the concrete, the final dosage must begin after 2/3 of the wet mixing time.

Compatibility

Sika® ViscoCrete®-20 ET may be combined with many other Sika products. Trials must always be carried out before combining products in specific mixes. Contact Sika Technical Department for additional information and any specific combinations.
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

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