How to judge whether the spraying effect of a wet spraying manipulator meets the standard? To judge whether the spraying effect of a wet spraying manipulator meets the standard, it can be evaluated from the following 6 aspects:

　　1. Spraying uniformity:

　　Observe whether the wet spraying manipulator can form a uniform covering layer when spraying concrete, without obvious leakage or accumulation.

　　Check whether the spraying surface is flat and has no obvious unevenness to evaluate the uniformity of spraying.

　　2. Bonding strength:

　　Through laboratory testing or field tests, evaluate the bonding strength between the sprayed concrete and the base layer to ensure that it meets the design requirements.

　　Check whether the concrete after spraying is easy to fall off or hollowing, which is an important indicator for judging the bonding strength.

　　3. Rebound rate:

　　Measure the rebound rate of sprayed concrete, that is, the percentage of the weight of concrete that is not adhered to the construction surface to the total spraying weight.

　　According to relevant standards and specifications, the rebound rate should be controlled within a certain range. Too high a rebound rate may mean a waste of materials and energy.

　　4. Humidity control:

　　Ensure that the spraying humidity of the wet spraying manipulator is appropriate, neither too dry nor too wet, to ensure the workability of the concrete and the final construction quality.

　　Through on-site measurement and observation, evaluate the evaporation and absorption of water during the wet spraying process to ensure that the humidity is controlled in the best state.

　　5. Construction efficiency:

　　Evaluate the working efficiency of the wet spraying manipulator, including the spraying volume per unit time, the convenience of operation, and the contribution to the construction progress.

　　Compare the working efficiency of wet spraying manipulators of different brands and select those that can improve construction efficiency.

　　6. Comply with regulatory requirements:

　　Ensure that the use and operation of the wet spraying manipulator comply with local building regulations and construction standards, including safety regulations, environmental protection requirements, etc.

　　Through the above evaluation methods, it is possible to comprehensively judge whether the spraying effect of the wet spraying manipulator meets the standards, providing a basis for subsequent construction quality control.