Garkusha M. Improving the method of evaluation of the stability of coverage of non-rigid pavement to rutting

Thesis is devoted to the improvement of the method of assessing the stability of non - rigid pavement to rutting, due to complex inference of major factors: thermovixoelastic properties of asphalt, vertical tracking force of vehicles and its exposure time on construction, level of effects of vertical tracking force. It was established that non-rigid pavement is in rough operating conditions, it is confirmed by intensive growth of defects, such as rutting, due to increase of traffic loads and high summer temperatures, as well as existing methods of assessing the stability of coverage to rutting are not enough studied. Analytical dependency is achieved and method of assessing the stability of coverage to rutting from influence of vertical tracking force is improved, it is allowed to consider complex impact of major factors: thermoviscoelastic properties of asphalt, ground stabilization, asphalt's temperature, vertical pressure on pavement of pneumatic tire wheels of vehicles, intention of vertical pressure, action time of pressure. Perfomance thermoreological predictions of asphalt and ground stabilization, adhesional strength between asphalt and the base in shear are experimental researched, field percolation tests, experimental and bench researches were done; properties of factors' impact on increase in rutting of asphalt of non-rigid pavement were achieved. Practical recommendations and method of increasing of stability analysis of asphalt of non-rigid pavement to rutting by means of recipe-structural, constructive and technological factors allow to receive economic impact of it. Results of thesis were used in drafting of regulations for engineering, construction, repair and usage of asphalt pavement on Roadway Network of Ukraine.