Product Data Sheet Show all documents

Sikament® RB 850 PK

High range, water reducing superplasticiser for rheoplastic concretes

Sikament® RB 850 PK is formulated from synthetic polymers specially designed to impart rheoplastic qualities to concrete.
A rheoplastic concrete is a fluid concrete with a slump of at least 200mm, easily flowing, but at the same time free from segregation and having the same water/cement ratio as that of a low slump concrete (25mm) without admixture. Sikament® RB 850 PK is chloride free.

Sikament® RB 850 PK considerably improves the properties of fresh and hardened concrete.
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Product Data Sheet Show all documents

Usage

  • Microsilica concrete
  • Mass concrete pours
  • Ready mixed concrete
  • Long-distance transport
  • Pumped concrete
  • Casting in hot climates  
To obtain
  • Reduced thermal peaks
  • High workability for longer periods
  • Lower pumping pressure
  • Delayed setting with longer workability
  • Higher ultimate strengths.
  • Reduced permeability
  • Improved durability

Advantages

Sikament® RB 850 PK considerably improves the properties of fresh and hardened concrete.

Packaging

05 ltr jerry can
20 ltr plastic can
200 ltr drum
1000 ltr IBC
Bulk supply in tanker is possible on demand

Colour

Brown Liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • EN 934-2 Tables 3.1, 3.2, 11.1 and 11.2
  • ASTM C-494 Type A, B, D, F, and G
Product Information

Chemical Base

Organic polymer blend

Shelf Life

12 months minimum from production date if stored properly in original unopened packaging

Storage Conditions

The product must be stored properly in undamaged, unopened original sealed packaging in dry conditions at temperatures between +5° C and
+35° C. Protect from direct sunlight and frost.

pH-Value

≥ 6

Total Chloride Ion Content

≤ 0.2% (EN934-2)

Specific gravity

1.2 ± 0.03

Application

Application Information

Compatibility

Sikament® RB 850 PK is compatible with all cements and most air entraining agents meeting the ASTM standards. The addition of Sikament® RB 850 PK and air entraining agent to concrete is recommended where it is required to withstand freezing and thawing cycles.

Dispensing

Sikament® RB 850 PK is a ready-to-use liquid which is dispensed into the concrete together with the mixing water. The plasticising effect and water reduction are higher if the admixture is added to the concrete after 50 to 70% of the mixing water has been added. The addition of Sikament® RB 850 PK to dry aggregate or cement is not recommended. 
Consumption

Recommended Dosage

Optimum dosage of Sikament® RB 850 PK should be determined in trial mixes. As a guide the following dosages are recommended as a starting point for any trial. In normal concrete a dosage of between 0.8-2.0 litre / 100kg total cementitious material. In high performance micro silica concrete a dosage of between 1.5-3.0 litre / 100kg total cementitious material. Dependant upon mix requirement, it is possible to use a higher dosage of Sikament® RB 850 PK without causing any adverse effects upon the concrete. 

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