MasterRheobuild® 820 | MCT CHEMICALS | MASTER BUILDERS SOLUTIONS

Sikament® RB 820 is a synthetic polymer specifically formulated to enhance the rheoplastic properties of concrete. Rheoplastic concrete is a highly fluid mix with a slump of at least 200mm, offering easy flow while remaining free of segregation. Despite its fluid nature, it maintains the same water/cement ratio as low-slump concrete (25mm) without the use of admixtures.

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USES
MasterRheobuild® 820 significantly improves the fresh and hardened properties of concrete, and is suitable for:

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

CHARACTERISTICS / ADVANTAGES

  • Reduced thermal peaks
  • High workability for extended periods
  • Lower pumping pressure
  • Delayed setting for prolonged workability
  • Enhanced ultimate strengths
  • Reduced permeability
  • Improved durability

APPROVALS / STANDARDS

  • ASTM C-494 Type A, B, D, F & G
  • BS 5075 Part 1

PRODUCT INFORMATION

  • Packaging: Available in IBC tanks and 210-liter drums
  • Shelf Life: 12 months from production, if kept in unopened, undamaged, and sealed packaging
  • Storage Conditions: Store at temperatures above +5°C. If frozen, thaw at +5°C or higher and reconstitute gently with mechanical agitation (do not use pressurized air). Keep out of direct sunlight and protect from temperature extremes.
  • Appearance/Colour: Dark brown liquid
  • Specific Gravity: 1.12 ± 0.02 at 25°C
  • pH Value: ≥ 6
  • Total Chloride Ion Content: < 0.2%

APPLICATION INFORMATION

  • Recommended Dosage: The optimal dosage should be determined through trial mixes. A typical starting range is 800ml to 2000ml per 100kg of cementitious material. For high-performance concrete, up to 2000ml per 100kg may be used, subject to site trials.
  • Compatibility: MasterRheobuild® 820 is compatible with all cements and most air-entraining agents that meet ASTM standards. It is recommended for use with SikaControl®-720 AER (air-entraining agent) for concrete subjected to freeze-thaw conditions.
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