Gunite and concrete both consist of cement, aggregates and water, but their application methods and mixtures differ(aggregates such as sand and gravel):
How to apply:
Gunite Machine: Using a high-pressure hose to spray a mixture of dry cement and sand or aggregate onto a surface usually reinforced with steel mesh or rebar. Water is added at the nozzle and mixed with the dry mixture, forming a dense layer upon impact.
Shotcrete Machine: It is usually poured into a form or mold, where it then cures and hardens into the desired shape. For larger projects, specialized equipment may also be used to pump the concrete into place.
Mixing process:
Gunite: Dry ingredients (cement and sand or aggregate) are mixed at the nozzle of a spray equipment, with water added during application to create a wet mixture.
Concrete: The dry shotcrete machine are mixed together with water before being poured or pumped into place.
Strength and Density:
Shotcrete: Due to the high-speed construction method, shotcrete typically results in a denser, stronger end product than traditional poured concrete.
Concrete: The strength and density of concrete can vary greatly depending on mix design and curing processes.
Application areas:
Jetstone: Commonly used in applications that require structural reinforcement and stabilization, such as swimming pools, tunnels, retaining walls, and slope stabilization.
Concrete: It is used in a wide range of construction projects including building foundations, sidewalks, driveways, roads, bridges, etc.
To summarize, while both shotcrete and concrete are composed of similar materials, their application methods and resulting properties make them suitable for different types of construction projects. Gunite is favored for its strength, versatility and ability to adapt to complex shapes, while concrete is used in a variety of applications for its ease of use and construction flexibility.
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