CONSTRUCTION OF THIN ASPHALT WEARING COURSES WITH MODIFIED BITUMEN IN THE ROAD NETWORK OF HUNGARY

The thin produced with the use of modified bitumens are economical for the reconstruction of our motor-way surfaces in spite of the higher price of the modified bitumens. From technological point of view, the thin asphalt wearing surfaces can be used with advantage in the following cases:- for the preservation and renewal of the substar:ce of aged wearing surfaces and road pavements~ for the renewal of the smoothened surfaces of the wearing-surfaces not rough enough any longer with respect to traffic safety, on sections at a specified height between elevated edges, for building a rough wearing surface necessary to meet special requirements. The conditions of applying a series of asphalt mechanical investigations 11ave been established in the Laboratory of the Department of Road Engineering. Technical Cniver-sity of Budapest. The basic idea of the investigation system is the investigation of the asphalt in three important temperature ranges in accordance with real climatic conditions during the endurance of the road with different methods taking the viscoelastic character of the a,sphalt into consideration