A dynamic shear rheometer, commonly known as DSR, is used for research and development as well as for quality control in the manufacture of a wide range of materials. Dynamic shear rheometers have been used since 1993 when Superpave was used for characterising and understanding high temperature

rheological Rheology (; ) is the study of the flow of matter, primarily in a fluid (liquid or gas) state, but also as "soft solids" or solids under conditions in which they respond with plastic flow rather than deforming elastically in response to an appl ...

properties of

asphalt Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term ...

binders in both the molten and solid state and is fundamental in order formulate the chemistry and predict the end-use performance of these materials. This is done by deriving the complex modulus (G*) from the storage modulus (elastic response, G') and loss modulus (viscous behaviour, G") yielding G* as a function of stress over strain. It is used to characterize the viscoelastic behavior of asphalt binders at intermediate temperatures from 10° to 150 °C (50° to 302 °F).

References

{{reflist *http://cooper.co.uk/shop/bitumen-testing/dynamic-shear-rheometer/ *http://www.google.com/patents/US5271266 *https://web.archive.org/web/20140707183404/http://ijret.org/Volumes/V02/I13/IJRET_110213033.pdf *https://archive.today/20140815135637/http://www.rheotest.de/english/laboratory-instruments/dsr-bitumen-rheometer-rheotest-rn-4-3/

References

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