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Rheometer


Bending Beam Rheometers

The Bending Beam Rheometer (BBR) is used to measure low-temperature (ambient to -36°C) flexural creep stiffness. During testing, a constant load (0-450 g) is applied to the centre of a small asphalt beam for a selected duration. Deflection of centre-point of the beam is measured continuously within 0.155 µ and monitored by computer. Test parameters are input via computer, which also displays and prints a plot of load vs. deflection and calculates stiffness at the lowest temperature anticipated. Test takes about 6 minutes. Thermoelectric model GHM-54 (TE-BBR) uses modem Peltier technology to cool the bath via surrounding solid state cooling modules to within 0.03°C. An adjustable-speed magnet...


Bohlin Instrument's Rheometers (Air Bearing Model)

The Rheometer is designed to measure an asphalt binder's mechanical properties, such as modulus (stiffness). Viscosity (flow or resistance to flow) and elasticity (ability to recover when deformed), at whatever tempreature and traffic loading a road way is subjected to. The DSR's hardware and software work together to complete the testing process. The operator only has to load the sample and push the start button. The computer and software insures the result is compliant with the methods of AMRL. The process begins when the operator loads a few grams of asphalt binder between the DSR's two horizontal, parallel metal plates that are 1 inch in diameter and 0.04 inches apart. These plates are t...


Bohlin Instrument's Rheometers (Mechanical Bearing Model)

The Rheometer is designed to measure an asphalt binder's mechanical properties, such as modulus (stiffness). Viscosity (flow or resistance to flow) and elasticity (ability to recover when deformed), at whatever tempreature and traffic loading a road way is subjected to. The DSR's hardware and software work together to complete the testing process. The operator only has to load the sample and push the start button. The computer and software insures the result is compliant with the methods of AMRL. The process begins when the operator loads a few grams of asphalt binder between the DSR's two horizontal, parallel metal plates that are 1 inch in diameter and 0.04 inches apart. These plates are t...