Browsing by Author "Leonovich, S. N."

Now showing items 1-13 of 13

    • 3D-Modeling for Life Cycle of the Structure 

      Leonovich, S. N.; Riachi, J. (БНТУ, 2021)
      Owners and construction management are in permanent search to increase competitiveness, reduce cost and time and maintain a high quality of products and services. In this objective project management tend to organize work execution by implementing comprehensive, linked and sequential processes, making full use of every work effort and limiting work duplication and rework. Since ...
      2021-02-04

    • Algorithm of Plastic Concrete Crack Resistance is Calculation under Capillary Shrinkage Using Generalizing Criteria 

      Leonovich, S. N. (БНТУ, 2018)
      The method of concrete crack-resistance prediction at early age is developed at capillary shrinkage with use of approaches of fracture mechanics, which is guided by the concept of accumulation of defects in structure in the form of capillaries and cracks to their critical concentration of Cc. At the same time process at two stages is considered: on the first – process of formation ...
      2019-01-02

    • Cement-Based Materials Modified with Nanoscale Additives 

      Polonina, E. N.; Leonovich, S. N.; Khroustalev, B. M.; Sadovskaya, E. A.; Budrevich, N. A. (БНТУ, 2021)
      The most common and reliable material without which modern construction is indispensable is concrete. The deve- lopment of construction production is pushing for new solutions to improve the quality of concrete mix and concrete. The most demanded and significant indicators of a concrete mixture are the compressive strength and mobility of the concrete mixture. Every year, the ...
      2021-06-07

    • Comparative Study of Fiber Glass Reinforced Polymer and Carbon Fiber Reinforced Polymer on Cube and Cylinder 

      AL-obaidi, A. M. Sh.; Leonovich, S. N. (БНТУ, 2023)
      A comparative analysis of polymers reinforced with glass fiber and polymers reinforced with carbon fiber was carried out on a cube and a cylinder in the laboratories of Baghdad. 36 samples were taken with fiber percentages of 1.0, 2.5 and 5.0 % by weight of cement. The methodology of this study included the use of composite polymer fibers in the external reinforcement of concrete ...
      2023-02-08

    • Composite Materials Based on Cement Binders Modified with SiO₂ Nanoadditives 

      Khroustalev, B. M.; Leonovich, S. N.; Potapov, V. V.; Grushevskaya, E. N. (БНТУ, 2017)
      Development of nanotechnologies allows to solve a number of problems of construction materials science: increase in strength, durability, abrasion and corrosion resistance that determines operational reliability of building constructions. Generally it is achieved due to nanoparticles that modify the structure and properties of the existing materials or products and are entered ...
      2017-11-26

    • Durability of the Japanese concrete structures on Sakhalin island 

      Shalyi, E. E.; Leonovich, S. N.; Kim, L. V.; Dzhogolyuk, A. G. (БНТУ, 2017)
      Concrete under exploitation conditions, are particularly susceptible to environmental aggressive action, which consists of the concrete surface layer neutralization and the compounds formation that affect its properties. The most common operating environment for main part of marine structures design is aggressive chloride environment and carbonation. The inspections of reinforced ...
      2017-09-15

    • Heat-Resistant Foam Concrete on the Basis of Two-Component Binder 

      Leonovich, S. N.; Sviridov, D. V.; Belanovich, A. L.; Savenko, V. P.; Karpushenkov, S. A. (БНТУ, 2019)
      The composition of dry mix on the basis of two-component cementing agent (aluminous cement and clay of the “Kustikha” field), mineral additives (a metakaolin, the RSAM sulfoaluminate modifier, waste of basalt fiber), Ufapore foamer and the accelerating and plasticizing “Citrate-T” additive is developed. When mixing “Citrate-T” additive with water at Water/Solid = 0.45–0.70, the ...
      2019-04-16

    • Modeling of Capillary Shrinkage and Cracking in Early-Age Concrete 

      Leonovich, S. N. (БНТУ, 2018)
      Scientific hypothesis on moistening shrinkage mechanism for cement stone and concrete has been assumed as a basis for the present paper. Physical ideas on a mechanism for cracks volume increment in a concrete model presented as two-level structure have been accepted as a theoretical basis for a calculation method of crack resistance during capillary shrinkage. These ideas are the ...
      2018-08-02

    • Multi-Parameter Methodology for Assessing Quality Indicators of Nanomodified Fiber-Reinforced Concrete for Construction Site 

      Leonovich, S. N.; Sadovskaya, E. A.; Koleda, A. A. (БНТУ, 2023)
      Nanomodified fiber-reinforced concrete is a building material for which the required characteristics of fracture toughness are a distinctive feature. Determination of the stress intensity factor of fiber-reinforced concrete makes it possible to correctly assess the resistance of the material during the formation and development of cracks. The proposed multi-parameter methodology ...
      2023-10-20

    • Nanofiber Concrete: Multi-Level Reinforcement 

      Leonovich, S. N.; Sadovskaya, E. А. (БНТУ, 2022)
      Concrete is the most commonly used building material worldwide. One of its main disadvantages is the fragility of fracture and low crack resistance. The use of dispersed reinforcement of concrete composites is a promising direction in solving this type of problem. Dispersed fibers, evenly distributed over the entire volume of the material, create a spatial frame and contribute ...
      2022-11-11

    • Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction 

      Leonovich, S. N.; Shalyi, E. E.; Kim, L. V. (БНТУ, 2019)
      Reinforcement corrosion of marine and coastal hydraulic structures due to chloride aggression and concrete carbonization leads to a sharp decrease in structure safety. The reinforcement is subjected to a depassivation process as soon as a chloride concentration on its surface exceeds a certain threshold concentration, or the pH value in a concrete protective layer is decreased ...
      2019-08-12

    • Structural Modification of New Formations in Cement Matrix Using Carbon Nanotube Dispersions and Nanosilica 

      Khroustalev, B. M.; Leonovich, S. N.; Yakovlev, G. I.; Polianskich, I. S.; Lahayne, O.; Eberhardsteiner, J.; Skripkiunas, G.; Pudov, I. A.; Karpova, E. A. (БНТУ, 2017)
      Complex nanodispersed systems with multi-walled carbon nanotubes and nanodispersed silica have a significant impact on the processes of hydration, hardening and strength gain of construction composites predetermining their durability. While using a scanning electron microscope with an attachment for X-ray microanalysis and a device for infrared spectral analysis investigations ...
      2017-04-03

    • The application of bim techology in construction engineering cost management 

      Xianpeng, Wang; Mingyuan, Wang; Leonovich, S. N. (БНТУ, 2021)
      In the information age, BIM modeling technology has become an indispensable part of construction engineering. At this stage, the combination of BIM technology and engineering cost management is the main problem of construction engineering cost management reform; this article mainly conducts BIM technology The concept definition and characteristics are analyzed, and the status quo ...
      2021-10-27