Dynamic Shear Rheometers

Dynamic Shear Rheometers have the capability of measuring an asphalt binders mechanical properties, such as modulus (stiffness), viscosity (slow or resistance to flow) and elasticity (ability to recover when deformed) at whatever temperature and traffic loading a roadway is subjected to. By determining the complex shear modulus and phase angle, the dynamic shear rheometer can characterize the viscous and elastic behavior of asphalt binders. The DSR is capable of testing RTFO and PAV aged binders as well as un-aged samples. Temperature control, 0.01°C resolution +/-0.03°C stability and Smart Gap auto compensation of thermal expansion & contraction. An environmental enclosure provides auto fill & drain of sample area. The DSR test stations include all required software and hardware to perform the Performance Grade Binder Specification evaluation as outlined by SHRP, AASHTO and ASTM. R&D software for complete material characterization as a function of shear stress, strain, rate, time, frequency, and temperature. Testing modes include: Spec grading mode for Intermediate and High temperature testing (AASHTO); Grade Determination Mode for automated operation and True Grade analysis; and Linearity Determination Mode (AASHTO)