FACTORS INFLUENCING THE EFFICIENCY OF THE PROCESS OF MODIFICATION OF OIL BITUMENS WITH RUBBER CRUMB

Statement of the problem. In global practice the greatest distribution was gained by technologies of modification of Asphalt Rubber and Terminal Blended bitumens, each of which possesses the shortcomings. Therefore it is necessary to combine them on the basis of the synergy effect, and for this purpose it is necessary to know what factors influence the efficiency of modification. Results. The factors (the size, a specific surface and the chemical compositions of a rubber crumb, speed of rotation of the mixer, structure of the dispersive environment, temperature and duration of process) determining the efficiency of process of modification of bitumens by a rubber crumb with their systematization and breakdown on a version (basic active and passive, integrated) as well as justification of the recommended range of definition are defined. Conclusions. As a result of the executed theoretical research, the use of bitumen of a rubber crumb for modification with the developed specific surface and big scope of the sizes of particles of the average value, rather small on value, is justified and the rational interval of a variation of temperature of process is established.