Galkin A. Evaluation of structural and mechanical properties of bitumen modified with SBS type polymers

Object of research - processes of structure and directed regulation bitumen quality by thermoplastic type styrene-butadiene-styrene modification. The goal is to develop methods for assessing the quality of bitumen modified with polymers, and predict their properties in the stages of preparation and operation. Research methods. Physical and mechanical properties of bitumen modified with polymers, defined by ДСТУ Б В.2.7-135:2007 "Будівельні матеріали. Бітуми дорожні, модифіковані полімерами". In addition to assessing the rheological properties of modified bitumen used rotary viscometer method. The stability of modified bitumen in technology storage evaluated according to methodological guidelines МВ 318-02071168-606:2007 "Визначення стабільності при зберіганні бітумів, модифікованих полімерами", developed in this work. The structure of the modified bitumen determined by fluorescent microscopy. For processing and analysis of experimental results used methods of mathematical statistics, including elements of correlation and regression analysis. Scientific novelty of the results. For the first time: quantitative relationships established for technical and rheological characteristics of PMB containing 10 % polymer made from bitumens of different consistency and technological species; evaluated the prognostic ability of ekvipenetration temperature as heat resistance criterion and as a parameter to assign temperatures mixing PMB with mineral material in the production of asphalt mixtures; shown independent of the level of PMB elasticity deformation state of decline with the introduction of particulate mineral filler; the method of determining the polymer content type SBS in asphalt concrete by penetration, softening temperature and elasticity of extracted binder. Improved: equipment and adapted method for assessing the stability of BMP during storage, which is used in EU countries, to national regulatory framework; method for determining the cohesion of bituminous binders. Received further development of the concept of the relationship of the concentration dependence properties of modified bitumen various grades of their structure and suggested their division into three principle structural types. The practical significance of the results. According to the results of theoretical and experimental researches developed such guidelines: "Визначення стабільності при зберіганні бітумів, модифікованих полімерами" МВ 318-02071168-606:2007; "Метод визначення когезії бітумних в'яжучих" МВ 218-02071168-636:2008; "Визначення наявності та вмісту полімеру в асфальтобетонах" М02071168-709:2012.