Bending Beam Rheometer – BBR

The Bending Beam Rheometer, CRT-BBR measures flexural creep stiffness of asphalt binder at low temperatures (ambient to -40°C).
A constant load is applied to the centre of a small asphalt beam specimen, and the deflection of the beam is measured and recorded. Tests are quickly and easily set up and parameters input through the included PC with pre- installed software. Load, displacement, and bath temperature are displayed and displacement, loading, and temperature graphs are displayed throughout the test cycle. Stiffness is calculated at the lowest temperature anticipated.

The Bending Beam Rheometer, CRT-BBR uses an air bearing system (50 PSIG minimum, clean, dry compressed air source required) to assure reliable loading with accurate and repeatable results. A linear variable displacement transducer (LVDT) with a range of 6.35mm and accuracy to ±2?m measures deflection. The temperature-compensating 500g load cell with mechanical overload protection ensures accurate load results. Safe, rapid cooling of the test fluid (Ethylene Glycol/Water/Methanol) to -40°C (-40°F) is provided by the mechanical refrigeration system. Process temperature is controlled and monitored by two independent platinum RTD temperature transducers to maintain temperature stability.

Note: Adequate compressed air source must be supplied by user.

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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