PHYSICAL AND MECHANICAL PROPERTIES OF POLYURETHANE CRUSHED STONE FOR SLOPES OF EMBANKMENTS AND EXCAVATIONS OF ROADS AND RAILWAYS

Statement of the problem. It is necessary to determine the nature of the interaction of the polyurethane binder with crushed stone of various fractions and brands. It is also important to carry out a comparative analysis of the physical and mechanical properties of polyurethane and bituminous binders. The issue of the prospects of a possible use of a polyurethane binder on various elements of a road structure, including on the slopes of mounds and excavations of roads and railways was considered. Results. Some experiments were conducted to study the adhesion of rubble to polyurethane and bituminous binders. The adhesion indices of the binding materials are investigated with the Vialite instrument. An experiment was also conducted to determine the roughness of the polyurethane crushed stone layer as well as to study the possibility of using this structure as a pavement surfacing. Conclusions. As a result of the tests, the polyurethane binder was show to interact excellently with rubble compared to bitumen in the same conditions. The experience in determining the macroroughness did not provide an unambiguous answer as to whether it was possible to use the layer under investigation as a covering of the motor road or not.