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SikaViscoCrete-20HE

Sika® ViscoCrete®-20 HE PK is a third-generation superplasticizer designed for use in concrete and mortar. This product is ideal for use in hot and tropical climates.

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USES
Sika® ViscoCrete®-20 HE PK is particularly effective for concrete mixes requiring high early strength, substantial water reduction, and excellent flowability. It is commonly used for:

  • Pre-cast concrete
  • Fast-track concrete
  • In-situ concrete needing quick stripping times
  • Self-Compacting Concrete (SCC)

CHARACTERISTICS / ADVANTAGES
Sika® ViscoCrete®-20 HE PK functions as a powerful superplasticizer through various mechanisms, including surface adsorption and steric effects that separate binder particles. This results in:

  • Enhanced early strength development, leading to faster stripping times for pre-cast and in-situ concrete
  • Significant water reduction of over 20%, which leads to higher density, strength, and reduced water permeability
  • Excellent plasticizing effect, improving flowability and ease of placement and compaction
  • Reduced energy costs for steam curing of pre-cast elements
  • Ideal for producing Self-Compacting Concrete (SCC)
  • Improved shrinkage and creep behavior
  • Reduced closure times for road and runway repairs

Sika® ViscoCrete®-20 HE PK does not contain chlorides or other ingredients that may cause corrosion of steel reinforcement, making it suitable for reinforced and pre-stressed concrete.

APPROVALS / STANDARDS
Sika® ViscoCrete®-20 HE PK meets the requirements of ASTM C494, Type F.

PRODUCT INFORMATION

  • Chemical Base: Aqueous solution of modified polycarboxylates
  • Packaging: 1000 L IBC, 200 L drum, 20 L plastic can, 5 L jerry can, Bulk supply available on request
  • Shelf Life: 12 months minimum from production date if stored correctly in unopened packaging
  • Storage Conditions: Store in a dry area between 5°C and 35°C, away from direct sunlight
  • Appearance / Colour: Light brownish liquid, clear to slightly cloudy
  • Specific Gravity: ~1.11 at 25°C
  • Solid Content by Weight: > 48%
  • pH Value: ~4.3 (+1) at 25°C
  • Total Chloride Ion Content: Nil

APPLICATION INFORMATION

  • Recommended Dosage:
    • For medium workability: 0.2-0.8% by weight of cement
    • For high workability, very low water/cement ratio, or Self-Compacting Concrete: 1.0–2.0% by weight of cement
      It is recommended to carry out trial mixes to determine the correct dosage.
  • Dispensing: Sika® ViscoCrete®-20 HE PK should be added to the gauging water or mixed simultaneously with it in the concrete mixer. For optimal use of its water-reducing properties, a thorough mixing time of at least 60 seconds is recommended.

Compatibility: Sika® ViscoCrete®-20 HE PK can be 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

It is advisable to conduct trial mixes before combining products.

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