ABSTRACT
ABSTRACT: Behavior of asphalt mixes and typical failures of the pavement structure, which are influenced by high or low temperatures, are most significantly influenced by the behavior of bituminous binder. The experimental method for assessment of asphalt mix characteristics at low temperatures has not been set in European standards yet, however a test method based on the experience of Prof. Arand is at the moment in preparation. Using this test method the specimen is exposed in a special chamber to decreasing temperature of the ambient environment without the possibility of shrinkage. In the Czech Republic the asphalt mix behavior in the range of low temperatures is so far observed and assessed using the approach of bending beam test at the zero temperature or even lower temperatures. A second test method, which is usually done in parallel on the same testing apparatus, is the relaxation test. The practical part of the paper addresses the testing, analysis and evaluation of low temperature characteristics for various HSM (high stiffness modulus) asphalt mixes as well as of asphalt mixes for SAL (stress absorbing layers).
