Dynamic Shear Rheometer (DSR)

Dynamic Shear Rheometers (DSR) classify asphalt binders based on their resistance to damage from age, temperature, and mechanical forces over a wide temperature range. DSRs are particularly important in the characterizations of polymer-modified, performance-graded (PG) binders used in modern Superpave mix designs.

Dynamic Shear Rheometers are configured to meet the demands of everyday quality control testing of 4, 8, and 18mm samples in asphalt production facilities. These models are ideal for the classification of SHRP/Superpave PG binders.

A disc-shaped binder sample is confined between two parallel plates and subjected to horizontal oscillation to determine dynamic shear properties. The synchronous, brushless DC motor drives a rotor mounted on a frictionless air bearing to allow the most precise movement and sensitive measurements. An operation requires a clean, dry, and oil-free supply of compressed air.

The maximum torque is 125mNm (milliNewtons-meter), and the minimum oscillation torque is 1μNm. The speed range is from 10-3 to 1,500rpm. Operating air pressures range from 58 to 101psi (4 to 7 bar) with an optimum pressure of 87psi (6 bar).

Standards：

ASTM D4402 、ASTM D7175 、ASTM D7405 、ASTM D4402 M、ASTM P246

EN 14770 、EN 13702 、EN 16659

AASHTO M320-10 、AASHTO M332-14 、AASHTO T315 、AASHTO T316 、AASHTO R29 、AASHTO T391 、AASHTO T350-14

JTG E20-2011 T0628、

DIN EN 13302、13702、14770、16659 "MSCR-Test"

FGSVAL 720 BTSV、AL 721 Constant Shear Rate、AL 722 Temperature Sweep、AL 723 MSCR-Test、TPB StB Part 2A、TPB StB Part 2B、TPB StB Part 4、TPB StB Part 5;

IS 73、15462

AGPT T125、T192、T194

GOS T33133、33137、58400.9、R 58400.1、R 58400.6、R 58400.7、R 58400.10

Technical Parameters：

Features：

Servo motor with ultra-low inertia

Ensures precise control of positioning and speed through a torque system without teethThe coreless motor design enables rapid adjustments in torque and speed, ensuring quick responses to changesCapable of delivering significant torque and power in relation to its compact sizeGuarantees a linear relationship between current and torque, and between voltage and speed for smooth operationHigh-precision sensor system

The optical encoder provides high-resolution measurement of rotational angular displacement and velocity, with a resolution of 10⁻⁴ radThe normal force sensor is highly sensitive, ensuring accurate and fast measurement and control of forcesThe torque sensor delivers precise readings of rotor torque, contributing to highly accurate measurementsThe precision grating system allows for accurate measurement and control of vertical movements, with a resolution of 0.1μmTemperature control system

Utilizes Peltier elements in both upper and lower clamps, along with high-resolution sensors, to maintain stable and precise temperature control of samplesFeatures a simple, one-step plug design for connecting power, communication, and fluids, providing efficient setup and secure connectionsCompact integrated design

The design integrates all necessary components, including mechanics, power supply, control systems, and display, into a small and highly functional unitAdvanced software

Displays real-time data on oscillation, torque, and normal force, with the ability to generate rheological modulus parameter curves using time-temperature superposition (TTS)The software can be customized to suit specific testing and data analysis requirements, providing flexibility for various user needs

Accessories:

DSR Silicone Specimen Molds are tear-resistant molds manufactured by Asphalt Institute and available for 4, 8, and 18mm mold sizes.

DSR Viscosity Standard Fluid comes in a 55mL bottle and is used for NIST traceable calibration