Теми тижня

  • Educational Component

    Brief content of the educational component:
    The purpose of studying the discipline is for the learner to acquire knowledge of the causes and consequences of the destruction of road surfaces and to acquire the skills to prevent them at the stage of designing compositions and properties of concrete, technology, production during service in pavements. Accordingly, a theoretical and laboratory study of the influence of external and internal structural factors on the durability of concrete is provided.
    The lecture course includes the study of: technological factors ensuring durability, the role of mechanical and temperature factors in the formation of plastic deformations, brittle fracture, as well as the influence of a corrosive environment and cyclic freezing-thawing on the durability of concrete and ways of increasing it, resistance against surface damage of pavements. Prospective materials resistant to mechanical and corrosion damage should be considered.
    Laboratory lessons will include the latest methods of testing concrete, in particular: determination of strength under different schemes of the stress state, evaluation of modulus of elasticity and dynamic and static fatigue and the effect on fatigue of cyclic freezing and thawing, anti-icing substances.

    After completing the course, the student must have the knowledge and skills to increase the durability of concrete.

    Prerequisites for studying the educational component: the study of the discipline is preceded by the mastery of the discipline "Building materials science" and "General chemistry".


    Competencies:
    SK04. The ability to perform surveys, tests, diagnostics and calculations when solving problems in the field of construction and civil engineering.
    SK06. The ability to use computer programs existing in the construction industry when solving complex engineering problems in the field of construction and civil engineering.
    SK07. The ability to clearly and unambiguously convey one's own knowledge, conclusions and arguments to specialists and non-specialists in the construction industry.
    SK08. Ability to integrate knowledge from other fields to solve complex problems in broad or multidisciplinary contexts.

    Author of the course: Viktor Oleksandrovych Zolotaryov https://rcf.khadi.kharkov.ua/kafedri/tekhnologiji-dorozhno-budivelnikh-materialiv/sklad-kafedri/zolotarov-viktor-oleksandrovich/

  • Reccomended literature

    Золотарьов В.О. Дорожні бітумні в’яжучі і асфальтобетони» Підручник в двох частинах. –Х. ХНАДУ, 2014-2015 р.р. –384 с.
    Золотарьов В.О. Вибрані твори в 3-х томах. Славутич, 2022-2015 р.р., –479с.
    Солодкий С.Й., Толмачов С.М. Бетонні дорожні та аеродромні покриття. Львів. ЛП, 2016, -132с.

    • 1. Introduction lecture

      Lecture plan:

      1. Terminology. Definition of basic concepts. General overview.
      2. The role of structural layers of road clothing in ensuring the durability of the road structure.
      3. Types of premature destruction of the surface of an automobile road, their causes and consequences.

      • 2 Physico-chemical processes in the technology of asphalt concrete mixtures and formation of asphalt concrete properties

        Lecture plan:

        1. Porosity and hollowness of asphalt concrete at the design stage.
        2. Physico-mechanical principles of dependence of asphalt concrete properties on bitumen content.
        3. Optimal parameters for preparing asphalt concrete mixtures. The role of viscosity, the contact angle of bitumen wetting of stone material.
        4. Optimal parameters of asphalt concrete mixture compaction. The effect of internal friction, temperature, pressure on the defect-free coating.

        • 3. Defects caused by high temperatures and ways to prevent them

          Lecture plan:

          1. Plastic deformations and conditions of their occurrence
          2. Shear resistance of asphalt concrete as resistance to rutting
          3. Prevention of rutting due to the use of polymer modifiers
          4. Prevention of rutting by changing the granulometric composition of asphalt concrete

          • 4. Crack formation on asphalt concrete surfaces. Occurrence and prevention

            Lecture plan:

            1. Theoretical prerequisites for the occurrence and development of cracks in an asphalt concrete coating
            2. Generally recognized ways of increasing the crack resistance of asphalt concrete
            3. Temperature stresses, fatigue and aging of the binder as prerequisites for cracking
            4. Controlled change in the properties of the binder to eliminate the prerequisites for asphalt concrete cracking

            • 5. Destruction of asphalt concrete pavements under the influence of water and cyclic freezing-thawing

              Lecture plan:

              1. Structural reasons for the decrease in the strength of asphalt concrete under the action of water, cyclic freezing and thawing
              2. Evaluation of the resistance of asphalt concrete to the action of water
              3. Ways of increasing the resistance of asphalt concrete to the action of water and frost
              4. Action of aggressive environments and ways to increase the resistance of asphalt concrete to this destruction factor
              5. Frost resistance of asphalt concrete and the use of elasticity modules for its assessment

              • 6. Technological causes of defects in asphalt concrete pavement

                Lecture plan:

                1. The effect of storage conditions of asphalt concrete components on the defectiveness of mixtures
                2. Influence of the properties of asphalt concrete components on the defectiveness of mixtures
                3. Possible violations of the optimal conditions for preparing asphalt concrete mixtures and their consequences
                4. Possible violations of the optimal conditions for laying and compacting asphalt concrete mixtures and their consequences
                5. Ways of improving technological equipment

                • 7. Prediction of quality and durability of flexible road pavements by field methods

                  Lecture plan:

                  1. The history of the emergence and development of road surface quality determination methods
                  2. Modern methods of determining and forecasting the quality of asphalt concrete
                  3. Laboratory and large-scale stands, training grounds. Foreign experience.
                  4. Determination of operational behavior of structural layers directly on roads

                  • 8. Environmental consequences of asphalt concrete technologies

                    Lecture plan:

                    1. Global experience in environmental safety issues during the construction and operation of highways
                    2. Asphalt-concrete mixtures and the environment
                    3. Emissions harmful to humans during the production of asphalt concrete mixtures
                    4. Ways to reduce carbon dioxide emissions