Computer Controlled Application of Shotcrete: A Status Report

The paper gives a short presentation about the reasons for mechanization of shotcrete application and how this development ties in with trends in the industry, going from wet-mix to dry-mix shotcrete and from mesh reinforcement to fiber reinforcement. These trends and the increasing use of shotcrete for construction of final permanent linings is another reason to use robotic application, to control the quality variation within a given project. Computerized aid is now available both for control of accelerator dosage and for operation of the nozzle manipulator. The main elements of such a system are described using the MEYCO Logica system as a basis. The available modes of operation and the benefits offered are presented along with some practical examples. The expected future developments of the system are described as well. For users who have suitable basic conditions and needs, the extra investment in computer control is both economically favorable as well as it offering quality advantages with a reduced demand for operator proficiency.