MODIFICATION AS A METHOD FOR IMPROVING THE PERFORMANCE PROPERTIES OF BITUMEN

Abstract

The most effective way to improve the properties of bitumen is modification with polymers. Studies of the properties of modified bitumens show that the quality depends on the nature of the filler and its composition in bitumen. The operating range of bitumen is characterized 
by the range of its plastic state - the difference between the softening and brittleness temperatures, and to increase it, it is necessary to lower the freezing temperature and increase the softening temperature of the dispersion medium. The interaction of the filler and the binder primarily determines the level of properties of composite materials and their preservation during operation. Modification of bitumen with various polymers is currently one of the most common methods of improving the quality of bitumen, but at the same time the most expensive. The interaction of components in chemical bitumen-polymer compositions ensures their homogeneity and stability, reduces the likelihood of stratification of the composition due to the difference in densities of bitumen and modifiers. The experimental data obtained confirm the positive technical effect of using lignin containing waste to improve the rheological properties of road bitumen. The resulting bitumen
polymer material with a lignin concentration. When used in road construction, 2, 5 and 10%, as well as 10% sulfolignin, it allows you to adjust the rheological properties of the bitumen binder.