Product Data Sheet Show all documents

Sika® ViscoCrete®-650 MK

HIGH RANGE WATER REDUCING/SUPERPLASTICISING ADMIXTURE FOR METAKAOLIN CONCRETE

Sika® ViscoCrete®-650 MK is a liquid admixture for concrete based on unique polycarboxylate polymers technologies. Sika® ViscoCrete®-650 MK is designed as
a high range water reducer or superplasticiser. It is particularly suited for use in Metakaolin concretes that require low water/cement ratios and / or high water reductions whilst maintaining excellent workability retention properties. Sika® ViscoCrete®-650 MK meets the requirements of
BS EN 934-2 table.

High range water reductions resulting in higher
strengths and densities

▪ Extended consistence retention
▪ Improved cohesion properties
▪ Improved early and ultimate strengths
▪ Excellent placement characteristics
▪ Improved rheology
▪ Improved durability
▪ Reduced segregation and bleeding
▪ Reduced drying shrinkage
▪ Reduced mix costs
Product Data Sheet Show all documents

Usage

Sika® ViscoCrete®-650 MK is a unique product that is
suitable for the production of ready mixed concrete or pre cast concrete
▪ Ideally suited for use in SCC and flowing concretes
▪ Suitability for use across broad range of consistence classes from S4 – SF3
▪ High performance concrete
▪ High rise/pumped concrete
▪ Slip form concrete
  • Improved effectiveness in higher ambient temperatures
 

Advantages

High range water reductions resulting in higher
strengths and densities

▪ Extended consistence retention
▪ Improved cohesion properties
▪ Improved early and ultimate strengths
▪ Excellent placement characteristics
▪ Improved rheology
▪ Improved durability
▪ Reduced segregation and bleeding
▪ Reduced drying shrinkage
▪ Reduced mix costs

Packaging

1000L IBC

Colour

Blue liquid

Product Details

Product Information

Chemical Base

Modified Polycarboxylate

Shelf Life

12 months from date of production if stored properly in undamaged containers.

Storage Conditions

Store in dry conditions at temperatures between +5°C and +25°C.
Protect from direct sunlight and frost.

Density

1.08 kg/l (at +20°C)

pH-Value

4.3 +/- 1%

Total Chloride Ion Content

Awaiting further testing
Technical Information

Specific Advice

Alkali Content: Awaiting further testing
Freezing Point: Awaiting further testing
Air Entrainment: Negligible, minimal increase
Effect of Setting: Minimal effect
Effect of Overdosing: Increased workability and segregation

Application

Application Information

Compatibility

Sika® ViscoCrete®-650 MK may be combined with many other Sika products.
Important: Always conduct trials before combining products in specific
mixes and contact our Technical Service Department for information and
advice about any specific combinations.
 

Dispensing

  • Sika® ViscoCrete®-650 MK should be dispensed through suitable calibrated dosing equipment.
  • Sika® ViscoCrete®-650 MK is added to the gauging water or added with it into the concrete mixer.
Consumption

Recommended Dosage

0.8 - 2.0 by weight of cement
Application steps

APPLICATION INSTRUCTIONS

Application Method / Tools
 

  • The standard rules of good concreting practice, concerning production and placing, are to be followed.
  • Laboratory trials shall 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 applied as soon as possible.


 

Notes on Application / Limitations
 

  • When using Sika® ViscoCrete®-650 MK a suitable mix  design has to be taken into account and local material  sources shall be trialled.
  • Sika® ViscoCrete®-650 MK shall not be added to dry cement.
  • Excessive water addition or overdosing may cause  bleeding or segregation.
  • Support from our Technical Service Department is recommended.
  • Frost: If frozen and / or if precipitation has occurred, Sika® ViscoCrete®-650 MK may be used after thawing slowly at room temperature followed by intensive remixing.

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