HS-30 is Si Powders micro fine slag blend cement, manufactured to the following specifications: d50 = 2-5 µm d98 = 30 µm HS-30 uses include: Additive to Concrete (Ultra) High performance concrete Fibrecrete Shotcrete/Spraycrete Standard pool spray Precast/Tilt-panel Concrete structures Render mix designs Gunite mix More information can be found in the Downloads section.