​MasterRheobuild 857S - High range, water reducing superplasticiser for concretes containing GGBS and microsilica


What is MasterRheobuild 857S?

MasterRheobuild 857S is formulated from synthetic polymers specially designed to impart rheoplastic qualities to concrete, particularly those containing GGBS or microsilica. 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. MasterRheobuild 857S is chloride free.

Which are MasterRheobuild 857S main advantages?

MasterRheobuild 857S considerably improves the properties of fresh and hardened concrete.

What is MasterRheobuild 857S used for?

MasterRheobuild 857S is primarily used for:

  • Mixes containing GGBS or microsilica
  • Mass concrete pours
  • Ready mixed concrete
  • Pumped concrete
  • Casting in hot climates

To obtain:

  • High workability for longer periods
  • Lower pumping pressure
  • Delayed setting with longer workability
  • Higher ultimate strengths
  • Reduced permeability
  • Improved durability

Product Information

Technical Data Sheet

Regional contacts

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