The influence of geometry and sample preparation on dynamic shear rheometer testing

摘要: The dynamic shear rheometer (DSR) can be considered to one of the most complex and powerful instruments for characterising flow properties bitumen. This paper describes an investigation into influence three sample preparation methods (hot pour, silicone mould weighing) two testing geometries (8 25 mm parallel plate) on rheological parameters measured during DSR testing. effect different geometry have been evaluated a series unmodified (penetration grade bitumen), process modified polymer bitumens. results indicate that method involving pouring hot bitumen onto plates then trimming edge is consistent means preparation. In terms geometry, show it advisable overlap when across certain transitionally stiffness regions (approximately 100kPa 8 geometries). addition, use Black diagrams modulus versus phase angle provides useful selecting suitable geometries. For covering abstract see ITRD E117840.