Specifications include, but are not limited to: 2.1.Dynamic Shear Rheometer 2.1.1.The DSR shall meet all requirements set forth in the most current versions of American Association of State Highway and Transportation Officials (AASHTO) T 315 “Standard Test Method for Determining the Rheological Properties of Asphalt Binder Using a Dynamic Shear Rheometer (DSR), ASTM D7175-08 “Test Method for Determining the Rheological Properties of Asphalt Binder Using a Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer and AASHTO T 3050 “Test Method for Multiple Stress Creep and Recovery (MSCR”) of Asphalt Binder Using a Dynamic Shear Rheometer: and ASTM D8189” Standard Test Method for Tackiness of Asphalt Binders and Emulsified Asphalt Residue Using the Dynamic Shear Rheometer”. 2.1.2.In addition, the DSR shall be of research quality to fulfill current and future non-standardized testing needs. 2.1.3.The DSR shall have an electrically commutated synchronous (EC) Motor with linear relationship between torque and current and fastest response time due to permanent magnets. Can control stress and strain, better control increases repeatability and accuracy. 2.1.4.DSR Shall have a rotation (shear”) torque range of 5 nNm to 200mNm and can be upgraded to lower the torque range to 1 nMn.
