Product Data Sheet Safety Data Sheet Show all documents

Sika ViscoFlow®-2020

WORKABILITY RETAINING ADMIXTURE

Sika ViscoFlow®-2020 is a workability retaining admixture for use in various concrete applications.

Sika ViscoFlow®-2020 is unique concrete admixture used to improve workability and slump retention of freshly-mixed concrete. Sika ViscoFlow®-2020 contains the latest time-released polycarboxylate polymer technology, allowing for controlled slump extension depending on project needs and actual concreting conditions. Sika ViscoFlow®-2020 typically does not significantly increase slump of the concrete mixture once introduced and properly mixed, but, rather, maintains concrete consistency for an extended period of time, resulting in a “flat” slump life performance. Sika ViscoFlow®-2020 can be successfully used in various concrete applications, specifically whenever extended slump retention and concrete plasticity without set time delays is required. Sika ViscoFlow®-2020 is engineered to maximize product performance and to deliver desired consistency across the wide variety of cementitious materials available on the market. Sika ViscoFlow®-2020 is not a set-retarding admixture.    
Use of Sika ViscoFlow®-2020 offers the following benefits to a concrete producer:
  • Extended slump retention without excessive set retardation
  • Reduced or eliminated need for concrete re-tempering
  • “Flat” slump life performance
  • Better ability to optimize concrete mix designs, resulting in cost savings
  • Ability to use higher content of supplementary cementitious materials due to improved production consistency
  • Ability to adjust the slump retention accordingly to transportation time
  • Easy and simple adjustment of concrete slump-retention based on ambient temperatures
  • Improved concrete consistency and reduced rejection rates due to issues related to concrete re-tempering
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika ViscoFlow®-2020 can be used in conventional, high slump or Self Consolidating Concrete, in precast/prestress or ready mix applications, or in any application where extended concrete plasticity without excessive retardation is required. Sika ViscoFlow®-2020 does not extend slump life by slowing down the hydration process of cement. Due to the utilization of a new engineered time-released polymer that allows for controlled and consistent slump extension with minimum initial slump increase, Sika ViscoFlow®-2020 makes it possile to transport freshly-mixed concrete for longer distances without need of re-tempering at the job site. Sika ViscoFlow®-2020 works as a slump-retaining admixture, not as a conventional water-reducer, making it more user-friendly with a more predictable performance over time. This becomes a benefit in cases where time between concrete batching and concrete placement is inconsistent. Sika ViscoFlow®-2020 can be used as a stand-alone additive or in combination with any Sika® concrete admixture.

Advantages

Sika ViscoFlow®-2020 is unique concrete admixture used to improve workability and slump retention of freshly-mixed concrete. Sika ViscoFlow®-2020 contains the latest time-released polycarboxylate polymer technology, allowing for controlled slump extension depending on project needs and actual concreting conditions. Sika ViscoFlow®-2020 typically does not significantly increase slump of the concrete mixture once introduced and properly mixed, but, rather, maintains concrete consistency for an extended period of time, resulting in a “flat” slump life performance. Sika ViscoFlow®-2020 can be successfully used in various concrete applications, specifically whenever extended slump retention and concrete plasticity without set time delays is required. Sika ViscoFlow®-2020 is engineered to maximize product performance and to deliver desired consistency across the wide variety of cementitious materials available on the market. Sika ViscoFlow®-2020 is not a set-retarding admixture.    
Use of Sika ViscoFlow®-2020 offers the following benefits to a concrete producer:
  • Extended slump retention without excessive set retardation
  • Reduced or eliminated need for concrete re-tempering
  • “Flat” slump life performance
  • Better ability to optimize concrete mix designs, resulting in cost savings
  • Ability to use higher content of supplementary cementitious materials due to improved production consistency
  • Ability to adjust the slump retention accordingly to transportation time
  • Easy and simple adjustment of concrete slump-retention based on ambient temperatures
  • Improved concrete consistency and reduced rejection rates due to issues related to concrete re-tempering

Packaging

205 L (54 US gal.) drum
1040 L (275 US gal.) IBC
Bulk delivery

Colour

Liquid / Pale Green

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika ViscoFlow®-2020 meets requirements of ASTM C494 Type A and S.
Product Information

Shelf Life

1 year in original, unopened packaging

Storage Conditions

Store in dry conditions above 5 °C (40 °F). Condition product at temperatures between 5 °C and 27 °C (40 °F and 80 °F). Protect from direct sunlight. If exposed to direct sun, colour fading may be observed. Colour change does not effect the performance. If frozen, thaw and agitate thoroughly to return to normal state.

Specific Gravity

Approx. 1.055

Application

Application Information

Mixing

Mixing

For maximum efficiency, add Sika ViscoFlow®-2020 directly to freshly-mixed concrete in the concrete mixer after all batching water and water-reducing admixture has been added. Sika ViscoFlow®-2020 may also be dispensed into freshly mixed concrete in a ready-mix truck, though it is preferable to add it at the concrete plant. To optimize the slump-retaining effect, Sika recommends that the combined materials be mixed for 80−100 revolutions either in the concrete mixer or in the ready-mix truck.

  
Combination With Other Admixtures: Sika ViscoFlow®-2020 can be used alone or in combination with other water-reducing admixtures produced by Sika. If used with products based on naphthalene sulfonate, plastic properties such as slump, slump retention or pumpability of concrete may be affected. Please contact your local sales representative for further information. In such a case, performance of actual mix design should be verified to confirm that it meets project specifications.

Clean Up

Use personal protective equipment (chemical resistant goggles/gloves/clothing). Without direct contact, remove spilled or excess product and place in suitable sealed container. Dispose of excess product and container in accordance with applicable environmental regulations.
Consumption

Recommended Dosage

Dosage rates of Sika ViscoFlow®-2020 will vary according to materials used, ambient conditions and the requirements of a specific project. Typically, Sika recommends dosage at 130−520 mL/100 kg (2−8 fl. oz. per 100 lb) of cementitious materials for general concrete applications. If maximum slump retention is required, dosage up to 975 mL/100 kg (15 fl. oz./100 lb) of cementitious materials may be used.

 
Dosage rates outside the recommended range may be used where specialized materials such as microsilica are specified, extreme ambient conditions are encountered or unusual project conditions require special consideration. In this case, contact your Sika Canada Technical Sales Representative for futher information. Verification of mix performance with actual materials in the field is always advised.

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