Flexible road pavements are efficiently used today due to their viscoelastic behavior in road construction as bituminous bond base courses, as well as surface layers. Under the high stress of the increasing traffic and climate, the low-temperature behavior is becoming more important to ensure a high resistance to low-temperature cracking and longer durability. The appearance of cold cracks, damaging the road structure and strongly reducing the life span, is closely related to the relaxation behavior of the bitumen as a binder of asphalt mix.
This complex material behavior is currently tested by either the conventional method - break-ing point according to Fraass or by the Bending Beam Rheometer (BBR). Suitable for such a characterization is also the Dynamic Shear Rheometer (DSR), which allows both a static and dynamic assesment of the behavior.
This master's thesis conducts a comprehensive literature review relating to the examination of the low-temperature behavior of bitumen in addition to the practical implementation and evaluation of tests with two kinds of bitumen using comparable test conditions. The material parameters can be directly applied for modeling the bitumen behavior in the low-temperature range and consequently for optimizing the use of bitumen in asphalt construc-tions to further prevent damage to road constructions.