Alkali-Free Powder Accelerator for Shotcrete

DENKA NATMIC Z-AF is an alkali-free powder accelerator for sprayed concrete based on calcium sulfoaluminate and can be used in civil engineering works such as road and railway tunnels, headraces, and mines. The accelerator is applied where initial rock support is needed or where a permanent lining will be placed.


  • Rapid setting time and high initial strength are performed through ettringite formation in the initial hydration stage.

  • Development of superior compressive strength after 28 days and excellent long-term durability.

  • Good bonding to the ground surface and less rebound.

  • Alkali free (Alkali ion content is less than 1%)

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