MasterRheobuild® 850PK

Description

USES
MasterRheobuild® 850PK significantly enhances both fresh and hardened concrete properties, making it suitable for:

• Microsilica concrete
• Mass concrete pours
• Ready-mix concrete
• Long-distance transport
• Pumped concrete
• Casting in hot climates

Benefits include:

• Reduced thermal peaks
• Extended workability for longer periods
• Reduced pumping pressure
• Delayed setting for prolonged workability
• Increased ultimate strengths
• Lower permeability
• Improved durability

CHARACTERISTICS / ADVANTAGES
MasterRheobuild® 850PK greatly improves the properties of both fresh and hardened concrete.

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

• Packaging: Available in bulk or 250 kg drums
• Shelf Life: Minimum 12 months from the production date
• Storage Conditions: Store at temperatures above +5°C. If the product freezes, thaw and agitate until fully reconstituted. Store in a sheltered area, away from direct sunlight and extreme temperatures. Improper storage may lead to premature deterioration of the product or packaging.
• Appearance/Colour: Brownish liquid
• Specific Gravity: 1.190 – 1.250 at 25°C
• pH Value: 6.0 – 9.0
• Total Chloride Ion Content: Chloride-free to EN 934-2

APPLICATION INFORMATION

• Recommended Dosage: The optimal dosage should be determined through trial mixes. As a starting point, the following dosages are suggested:
  • Normal concrete: 0.8-2.0 liters per 100kg of total cementitious material
  • High-performance microsilica concrete: 1.5-3.0 liters per 100kg of total cementitious material
    A higher dosage may be used if necessary without adverse effects on the concrete.
• Dispensing: Sikament® RB 850 PK is a ready-to-use liquid that should be added with the mixing water. The plasticizing effect and water reduction are maximized when the admixture is introduced after 50-70% of the mixing water has been added. Adding it directly to dry aggregate or cement is not recommended.
• Compatibility: Sikament® RB 850 PK is compatible with all cements and most air-entraining agents that meet ASTM standards. It is recommended for use with an air-entraining agent when freeze-thaw resistance is needed.