Product Data Sheet Show all documents

Sikament® RB 858 PK

High range, water reducing superplasticizer for rheoplastic concretes

Sikament® RB 858 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 200 mm, 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 858 PK is chloride free.

Sikament® RB 858 PK considerably improves the properties of fresh and hardened concret.
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Product Data Sheet Show all documents

Usage

Primary Uses
  • Microslica concrete
  • Mass Concrete
  • Ready Mix Concrete
  • Long-distance Concrete
  • Pumped concrete
  • Casting in hot climate  
To Obtain
  • Reduced thermal peaks
  • High workability for longer periods
  • Lower pumping pressure
  • Delayed setting for longer workability
  • Higher ultimate strength
  • Reduce permeability
  • Improved durability

Advantages

Sikament® RB 858 PK considerably improves the properties of fresh and hardened concret.

Packaging

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

Colour

Dark 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

1.26 ± 0.03

Application

Application Information

Compatibility

Sikament® RB 858 PK is compatible with all cement and most air-entraining agents meeting the ASTM standards. The addition of Sikament® RB 858 PK and Sika AER® (air entraining agent) to concrete is recommended where it is required to withstand freezing and thawing cycle.

Dispensing

Sikament® RB 858 PK is a ready-to-use liquid which is dispensed into the concrete together with the mixing water. The plasticizing 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 858 PK to dry aggregate or cement is not recommended.
Consumption

Recommended Dosage

Optimum dosage of Sikament® RB 858 PK should be determined in trial mixes. As a guide the following dosages are recommended as starting point for any trial. In normal concrete a dosage of between 0.8 to 2.0 liters per 100kg cementitious material. In high performance micro silica concrete a dosage of between 1.5 to 2.5 litres per 100kg cementitious material. Dependent upon mix requirement, it is possible to use a higher dosage of Sikament® RB 858 PK without causing any adverse effects upon the concrete. 

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