Product Data Sheet Show all documents

Sika® ViscoCrete®-20 HE

High Range Water Reducer Admixture

Sika® ViscoCrete®-20 HE   is a third generation superplasticiser designed for the production of concrete with high early strength characteristics. The special formulation of Sika® ViscoCrete®-20 HE optimises the dispersion of the binder and at the same time improves the concrete consistency and cohesion.

Sika® ViscoCrete®-20 HE is a high early strength superplasticiser, which through surface absorption and sterical effects, the following properties can be achieved:
  • Promote high density and impermeable concrete through extreme high water reduction.
  • Improves workability and finishability.
  • Improves shrinkage and creep behaviour.
  • Pronounced increase in the early strength development and set times.
  • Higher ultimate strengths.
  • Increases the durability of the concrete.
  • Improved flowability, placing and compacting behaviour,suitable for the production of self compacting concrete.
  • Early removal of formwork.
  • Does not contain chlorides.
  • Suitable for use in reinforced and pre-stressed concrete.
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

Sika® ViscoCrete®-20 HE is a high early strength superplasticiser, which through surface absorption and sterical effects, the following properties can be achieved:
  • Promote high density and impermeable concrete through extreme high water reduction.
  • Improves workability and finishability.
  • Improves shrinkage and creep behaviour.
  • Pronounced increase in the early strength development and set times.
  • Higher ultimate strengths.
  • Increases the durability of the concrete.
  • Improved flowability, placing and compacting behaviour,suitable for the production of self compacting concrete.
  • Early removal of formwork.
  • Does not contain chlorides.
  • Suitable for use in reinforced and pre-stressed concrete.

Packaging

Bulk supply, 1000 litre IBC, 205 litre drum, 10 litre container.

Colour

Light brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika® ViscoCrete®-20 HE meets and exceeds all requirements of Australian Standard 1478.1-2000 for High Range Water Reducer Type (HWR).
Product Information

Composition

Aqueous solution of modified polycarboxylates

Shelf life

Stored at temperature  between 5ºC and 35ºC in unopened original containers protected from direct sunlight and frost, shelf life is one (1) year.

Storage conditions

Sika® ViscoCrete®-20 HE must be stored in dry conditions at temperatures between +5 °C and +35 °C, protected from direct sunlight.

Density

~1.07 g/cm3

Application

Application Information

Dispensing

Sika® ViscoCrete®-20 HE is added to the initial batching water. For optimum utilisation of the high water reduction we recommend thorough mixing at a minimal wet mixing time of 60 seconds per cubic meter.

The addition of the remaining gauging water, to fine tune concrete consistency, should only be started after 2/3 of the wet mixing time, to avoid surplus water in the concrete.

 

Compatibility

Sika® ViscoCrete®-20 HE may be combined with many other Sika Concrete Admixtures, except Sikament NN.
Trials must always be carried out before combining products in specific mixes. Contact Sika Technical Services for additional information and any specific combinations.
Consumption

Recommended dosage

Dosage is 200 ml to 1000 ml per 100kg of total cementitious material.

Optimum dosage should be determined by site trials.

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