Dry Spray/Gunite

The RIX Group also offers dry spray shotcreting. Dry spray was the first shotcrete process invented. Dry spray shotcrete, or dry shot, was first introduced in the USA in 1907 where it remains commonly known as ‘gunite.’ In the early 1950s, wet shotcrete was developed and introduced commercially.

Dry spray is pumped in its dry form by high pressure air and mixed at the nozzle with water. Dry spray nozzlemen require an extra level of knowledge and care as they control the quality of shotcrete. Dry spray is best suited and more commonly used in the following applications:

  • Projects that require sculpting or carving
  • Simulated rock or blocks (mock rock)
  • Tele-remote shaft lining
  • Smaller quantities (<20m³)
  • Application via rope access
  • Rock simulation (mock rock)
  • Longer pumping distances, limited access or remote areas

Centre:  A completed Soil Nail Retaining Wall finished with Dry Spray Shotcrete in Geelong Ring Road near Melbourne, South-Eastern Australia – one of our many architectural finishes. The road was completed and opened in December 2011. The motorway now provides a 26km freeway link, which greatly diminishes travel time for commuters by bypassing more than 30 sets of traffic lights and other congestion. Emphasis was placed on architectural finishes in and around the new motorway, setting a new benchmark for visual thought within the road corridor environment.

Left:  Previously unusable, this carved simulated rock shotcrete retaining wall has transformed this backyard into a usable space.

Right: A recently completed dry spray shotcrete soil nail retaining wall supporting a key road on Sydney’s Northern Beaches, with simulated rock carved, stained and coloured to blend in with the surrounding bedrock.