The term Gunite refers to the "dry spray method" of spraying concrete. We use a gunite machine for this type of application dry batched material is fed into the machines hopper where it if forced down the line by compressed air to the nozzle gun. The nozzle gun has a water tap fitted to it which the nozzleman controls to hydrate the dry material.
We use this method of spraying concrete for smaller repair areas where using ready mix is not cost effective or for jobs where we have bad access for the larger machinery involved with the wet spray process.
Simply said, shotcrete is sprayed concrete or mortar. In the wet process all the ingredients, including water, are premixed. The mix is then pumped to the nozzle where compressed air blows it onto the substrate.
Shotcrete has a wide range of uses - casting new structures, swimming pools, scuplting waterscapes, lining tunnels and ditches, slope stabilisation and complex shapes such as skateboard parks and earth retaining structures, strengthening and repairing existing structures of all types, providing fireproofing and chemical protection to steel, construction of tanks, basement walls, underground parking facilities and any other place that can not be formed and poured.
The use of shotcrete to build new concrete structures as well as to restore and repair existing structures is well known and documented. Shotcrete for ground support in tunnel and mine operations is perhaps less known in the general construction community.
Underground shattering, however, consumes the largest of all pneumatic applications. Over the last 12 to 15 years, technical advancements in shattering equipment, concrete technology, and application methods have contributed to the growth of shotcrete as a primary support element in tunnel and mine applications.
Shotcrete has repeatedly demonstrated a versatility that few construction materials can rival. For most bridge repairs, the original concrete will require additional repairs long before the shotcrete needs repair. Properly designed, applied, and cured our shotcrete repairs suffer little deterioration.
Please explore our services to learn more about sprayed concrete applications.
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