MasterRheobuild® 856 is a readyto-use, high range water-reducing admixture designed to produce high slump concrete with workability retaining properties. The product is chloride free.
Improves the properties of fresh and hardened concrete
Reduced thermal peaks.
High workability for longer periods.
Lower pumping pressure.
Delayed setting with longer workability.
Higher ultimate strengths.
Reduced permeability.
Improved durability.
Application
Mixes containing GGBS and microsilica.
Mass concrete pours.
Ready mixed concrete.
Pumped concrete.
Casting in hot climates.
Dosage
In normal concrete a dosage of between 0.8 to 2.0 L/100kg total cementitious material. In a high performance, low water cement ratio concrete, between 1.5 to 2.5 L/100kg total cementitious material.
Standards
EN 934-2 Tables 11.1 and 11.2 ASTM C-494 Type B, D and G