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Temperature Controlled Cabinet

The temperature can be controlled to 0.2ºC over the range – 25ºC to + 60ºC using a P.I.D. digital temperature controller, the CAL3200. Forced air over the heater and cooling fins and through the air duct in the rear wall ensures a uniform temperature throughout the cabinet.

Defrost water drains via a pipe on the back of the cabinet to a heated tray underneath the cabinet where the water will evaporate. The cabinet also features an over temperature device which will switch off the fans, heating, cooling and illuminates a warning light if the set temperature is exceeded.

The front door is double-glazed and contains a heating element to ensure that the glass door remains clear. When testing asphalt good temperature control is essential.

Test data shows that a 1% change in temperature can cause up to 10% variation in stiffness results.

Asphalt Bitumen Equipment

Execute Sampling of Asphalt Materials for Testing

Unit Standard No: 116773

NQF Level: 2

Credits: 10

Days: 3

Overview: Learners who are assessed as competent against this unit standard will be able to demonstrate competence to sample asphalt materials, under supervision, for standard laboratory testing.

This unit standard will enable learners to identify hazards and protective measures during asphalt sampling, identify and prepare resource for sampling, execute sampling, label and transport samples to the laboratory. (under supervision ) The unit standard contributes to the overall competence required of the construction materials tester.

The laboratory test results are used for quality control purposes during the construction and manufacturing processes as well as for final acceptance of the finished products.

Its contribution to socio-economic transformation is that learners would be able to undergo RPL-assessment and thereby receive recognition for previous learning and experience. The employability and career prospects of learners can therefore be enhanced by this qualification.

Previously disadvantaged individuals with this qualification can also progress to the level 4 qualification – this will enable them to start their own businesses supplying a construction materials testing service – a process that will accelerate economic transformation and give economic empowerment.

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