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 center 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.
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