MasterSet

MasterSet R 961

MasterSet R 961

Set retarding admixture

How does MasterSet R 961 work?

MasterSet R 961 ready-to-use liquid admixture is used for making more uniform and predictable high-performance concrete while retarding its setting time to facilitate placing and finishing operations.

Recommended uses:
  • Prestressed concrete

  • Precast concrete

  • Reinforced concrete

  • Shotcrete

  • Lightweight concrete

  • Pumped concrete

  • 4x4 Concrete

  • Pervious concrete

  • Self-consolidating concrete (SCC)

What are the unique features of MasterSet R 961?
  • Reduced water content required for a given workability

  • Retarded setting characteristics

  • Improved workability

  • Reduced segregation

  • Superior finishing characteristics for flatwork and cast surfaces

  • Increased compressive and flexural strength

  • Full-form deflection can take place (before concrete sets) in extended pours for bridge decks, cantilevers, non-shored structural elements, etc.

  • Meets ASTM C 494/C 494M requirements for Type B, retarding, and Type D, water-reducing and retarding, admixtures

What are the benefits of MasterSet R 961?
  • Flexibility in scheduling of placing and finishing operations

  • Minimizes premature concrete hardening during extended delays between mixing and placing

  • Helps eliminate cold joints

  • Peak temperature and/or rate of temperature rise in mass concrete lowered thereby reducing thermal cracking