Safety

Safety is a central concept throughout the building industry but particularly in sprayed concrete construction, because it combines high-powered machinery (hydraulic/pneumatic/electronic) with a method of application in which the concrete is projected through the air! Its users and people in the immediate vicinity must be protected. The hazards are:

  • Transportation of the sprayed concrete in large vehicles, usually in confined spaces with poor lighting: Personal precautions include standing well clear early enough; wearing high-visibility protective clothing; adequate lighting on the vehicle (and cleaning it); reversing alarm signal
  • Transfer of the concrete to the conveyor: Guard to prevent access to the conveyor unit; personal protective equipment (important: splash protection for eyes)
  • Conveyance of the sprayed concrete, air and shotcrete accelerators to the point of application: Regular servicing of the equipment according to the maintenance plan (particularly checking the conveyor tubes or hoses); appropriate employee technical training of the mechanics; personal protective equipment; adequate site lighting
  • Application of the sprayed concrete: Personal protective equipment (impact-resistant goggles, helmet, gloves, breathing apparatus, ear defenders, safety boots, full body clothing); no entry to unprotected, freshly sprayed areas; adequate lighting
  • Personnel not involved should not be in the vicinity of the spraying operations. If they are,
    they must wear the same personal protective equipment

The most serious hazards are without doubt the risk of fresh sprayed concrete or unstabilized substrate falling onto workers, misuse of electrical, hydraulic and pneumatic equipment and installations and carelessness, especially forgetting to put on items of personal protective equipment such as safety goggles.