Abstract:
Modification of road bitumen by introducing multifunctional additives was studied in the article. Local domestic
and industrial wastes of polyurethane polymers were used as a raw material for obtaining such additives.
In order to determine the optimal conditions for modification and selection of effective reagent for the
process the method of probabilistically deterministic of planning of experiment was applied. Optimal parameters
of phenolytical modification of mixture of polyurethane elastomers for the purpose of synthesis of additives
for road asphalt bitumen blends were found on the basis of the experimental data processing. Comparison
between two methods for the preparation of bituminous mixtures allowed concluding that the introduction
of the modifier directly at the beginning of the heat treatment of the parent material is more appropriate
in the production of modified coal tar bitumen. The carried on tests of physical and mechanical properties of
modified coal tar bitumen showed that the use of synthesized modifier allows significantly expanding the
range of high performance and ensuring adhesion properties of the road coal tar bitumen. Conceptual scheme
of possible production of modified coal tar bitumen by intensive technology was proposed.
