The aim of the proposed scientific activity is to develop an original two-phase material model of asphalt concrete. The developed proprietary material model assumes the division of asphalt concrete components into two phases: (1) asphalt mortar (asphalt, filler, fine aggregate with a grain size < 2 mm) and (2) coarse aggregate with a grain size > 2 mm. The main advantage of the developed model is the random distribution of phases in the material, which makes it possible to reflect material inhomogeneities, randomness of composite features and take into account the dispersion of laboratory test results in numerical analyzes performed using the finite element method. The planned goal will be achieved in two stages: (1) preliminary research carried out at the Road Research Laboratory of the Gdańsk University of Technology and (2) research internship at the Universidad de Granada, Spain. Dividing the scientific task into two stages is necessary to obtain assumed project results. The combination of preliminary research carried out at the home university with research and analyzes carried out under the supervision of scientists from the University of Granada will allow the implementation of a new research method, not yet used in research at the Gdańsk University of Technology. The planned implementation of the task in two stages will minimize the cost of preliminary research (research carried out at the home university) and make the most of the time of the scientific internship (testing of samples prepared during stage 1). Going on an internship and having the opportunity to conduct joint research on a similar device is the best training ground for gaining practical knowledge and learning the technical nuances of sample preparation, setting rheometer parameters, performing tests and analyzing the results.