Environmental pollution: Dry-type shotcrete machines generate large amounts of dust during the spraying process, posing a health threat to workers and causing environmental pollution.

Poor spraying results: Without the aid of water, dry-type shotcrete machines struggle to fully fill the pores of the concrete surface, resulting in poor spraying results.

Slow application speed: Dry-type shotcrete machines require mixing before spraying and require multiple spraying passes, resulting in a slow application speed.

High construction difficulty: Dry-type shotcrete machines require specialized technicians to operate, placing high demands on the skills of the operators and the working environment.

High cost: Dry-type shotcrete machines are expensive to purchase, maintain, and service, making them difficult to economically meet the requirements of typical building renovation projects.

In summary, the above-mentioned shortcomings of dry-type shotcrete machines have led to their gradual elimination. Wet-type shotcrete machines are now more commonly used for concrete spraying.