Abstract:

There are some limitations in studying the low temperature properties of the asphalt by means of the bending beam rheometer(BBR) and the dynamic shear rheometer(DSR), so the samples of asphalt were tested by DSR at normal temperature and the obtained dynamic rheological properties were converted to the viscoelastic properties at low temperature using the timetemperature transformation principle and the transformation relation between the static and dynamic viscoelastic functions. The results obtained by such a indirect way were compared with the low temperature properties obtained directly by the BBR, and their interrelationship was analyzed. The results showed that the DSR data at normal temperature can be used to predict the low temperature behavior of the asphalt. Therefore, it is possible to get the viscoelastic properties of the asphalt over a much larger time interval than those measured at low temperature.

Key words: road engineering, asphalt, low temperature property, timetemperature transformation principle, dynamic shear rheometer, bending beam rheometer