Accelerated Aging of Bituminous Binders Using a High Frequency Torsional Rheometer

• A high frequency torsional rheometer (HFTR) is used to monitor the aging process of bituminous binders. The device measures the changes in the dynamic behavior of a rod performing torsional vibrations at a specified resonance frequency. The aging of a straight run bituminous binder 180/200 were characterized using the HFTR by quantifying the rheological changes that the material undergoes during exposure to air pressure and temperature in terms of the variation of the complex shear modulus. Experiments and numerical calculations were used to study the binder properties in the surface zone of the specimens that was directly exposed to heat and oxygen. Dynamic mechanical analysis (DMA) was used to measure the rheological properties of bituminous binders and asphalt mixes. The results shows that the top surface layers of the specimen were considerably stiffer than the internal layers which are not directly exposed to air.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Infrastrukturteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Infrastructure Engineering (hsv//eng)

Publication and Content Type

ref (subject category)

art (subject category)