The quality of a shotcrete machine can be judged by the following factors:
Shotcrete quality standards: The quality of shotcrete directly affects the quality of the project, so strict adherence to these standards is essential. For example, the accelerator must be a nationally certified product and expired or deteriorated products must not be used. The admixture level is generally 2-3.5% of the cement weight. The mortar mix ratio is cement: sand: water = 1:2.0:0.58. The shotcrete must be made with standard silicate cement with a grade no lower than 425#.
Shotcrete inspection standards: Before using the shotcrete machine, a thorough inspection is required to ensure it is in good working condition. This includes checking the machine for integrity, conducting a power-on, no-load test run, and tightening the friction plate to prevent air leakage. The spray gun's feed pipe, water ring, and its connecting parts should also be inspected for wear and to check for blockage in the water holes. Check the cylinder for debris and residual material, the discharge elbow for blockage, the piston cylinder, pressure gauge, motor, and other transmission components for proper function, the operating handles and switches for flexibility and reliability, the valves for air leaks, the seals for tightness, and the gearbox and bearings for lubrication.
Shotcrete Machine Accessories Selection: The quality of shotcrete machine accessories can also affect performance. For example, when selecting steel liners, pay attention to the sealing of the upper and lower grinding plates. Because steel liners wear rapidly during use, be sure to select high-manganese steel or stainless steel, both of which are highly wear-resistant. Cone sleeves are generally made of polyurethane, which is wear-resistant, pressure-resistant, and resistant to breakage. When selecting a cone sleeve, gently fold it to check for cracks at the crease. If cracks appear, the product is substandard and lacks wear resistance. Rubber sheets are among the most demanding of shotcrete machine accessories, so when selecting, pay attention to the sealing plate and the product's craftsmanship.
Working efficiency of shotcrete machine: The working efficiency of shotcrete machine is also an important indicator to measure its quality.
