Elements and Performance Criteria

This unit covers the shotcreteing of refractory. It includes the use of tools and ancillary equipment.
Shotcrete work may be the total requirement for the job, or it may need to join to brick/block, moulded or cast refractory.

OHS
All operations are subject to stringent OHS requirements and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and OHS requirements, the OHS requirements take precedence.

Assessment context and methods
Assessment for this unit of competency will be on appropriate equipment. The unit will be assessed in as holistic a manner as is practical and may be integrated with the assessment of other relevant units of competency. Assessment will occur over a range of situations which will include disruptions to normal, smooth operation.
Simulation or case studies/scenarios may be required to allow for timely assessment of parts of this competency unit. Simulation should be based on the actual plant and will include 'walk-throughs' of the relevant competency components. Simulations may also include the use of case studies/scenarios and role plays.

Resource implications
Assessment will require access to an operating plant over an extended period of time, or a suitable method of gathering evidence of operating ability over a range of situations. A bank of scenarios/case studies/what ifs will be required as will a bank of questions which will be used to probe the reasoning behind the observable actions.

Other assessment advice
In all plants it may be appropriate to assess this unit concurrently with relevant teamwork and communication units.

It may be appropriate to assess this unit concurrently with:

PMAOHS100B Follow OHS procedures.

Essential knowledge
methods of preparing background surfaces
types, uses and operation of tools and equipment
types, uses and operation of shotcreting equipment
types and characteristics of shotcreting materials
methods of mixing and applying shotcreting materials
methods of avoiding lamination of applied shotcreting materials
methods of protecting applied shotcreting material during application and curing
types and methods of finishing the surface of the
curing
reasons for, and timing of, dedicated curing and heat-up programs and the consequences of the installed concrete if the program is not correctly followed
types and uses of temporary support/formwork
methods of protecting work during installation
reasons for, and methods of, providing test panels
methods of cutting
safeguards to take during reinstatement
methods of removing damaged refractory
methods of keying and bonding new to existing refactories
reasons for, and methods of, obtaining seals between new and existing refractory
materials sources
materials types/categorisation
methods of production
familiarity with installation techniques
familiarity with principles of selection
familiarity with variety of applications.

Communicating ideas and information
(1)

Collecting analysing and organising information
(2)

Planning and organising activities
(0)

Working with others and in teams
(1)

Using mathematical ideas and techniques
(1)

Solving problems
(1)

Using technology
(1)