Structure Formation and Properties of Concrete Based on Organic Hydraulic Binders

Хрусталев, Б. М.; Веренько, В. А.; Занкович, В. В.; Алексеев, Ю. Г.; Сюэцзюнь, Юэ; Shan, B.; Ши, Цзикунь

doi:10.21122/2227-1031-2020-19-3-181-194

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…Since the deformation of viscoplastic bonds results in the complete dissipation of the energy applied, it can theoretically be assumed that the n r and n v ratio is determined by the ratio of the dissipative energy to the applied energy. In this case, the amount of n r and n v depends, first of all, on the relaxation properties of asphalt concrete and the duration of the load, and the number of elastic bonds involved in the deformation process can be determined from the following relationship [11][12][13]:…”

Section: Theoretical Background and Research Methodologymentioning

confidence: 99%

“…of effective stresses to strength, the higher, the higher R c is, the greater will be the cyclic stability of asphalt concrete in the elastic stage of operation, and the greater the level of damage in the material can be achieved at the moment of failure. Therefore, the value of R c can serve as a criterion for the cyclic stability at constant stress in the elastic stage of work [11][12][13][14].…”

Section: Theoretical Background and Research Methodologymentioning

confidence: 99%

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Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Zankavich¹,

Khroustalev

Veranko³

et al. 2020

SN Appl. Sci.

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This study is devoted to finding a solution to an important problem of increasing the accuracy of assessing the fatigue stability of composites based on recycled asphalt concrete. Another problem for solving was a selecting optimal and effective ways to improve their physical-mechanical properties during modification by polymers. For experimental work, a new indicator reflecting the strength of elastic structural bonds and the specific number of viscoplastic bonds was used as a criterion for fatigue stability of bituminous-cement composites. As shown by the results of the research, fatigue (cyclic) stability has an increasing trend with the growth of these parameters. As a result of processing data from experimental studies of the structural characteristics of composites, a comparative analysis of the effectiveness of modification of cold recycled mixes by styrene acrylate and epoxy resin was performed. It was established that the composites modified with styrene acrylates have a higher relaxation ability, which is reflected in the increase in the number of cycles to failure when testing for cyclic stability. It is also noted that with an increase in the content of epoxy resin in the composition of mixes, the increase in stiffness occurs much more strongly in comparison with an increase in their relaxation ability. At the same time, the efficiency of modification of cold recycled mixes with epoxy resins is significantly increased with the preliminary preparation of asphalt granulate (RAP), for example, during its plasticization with soy epoxidized oil. This work also allowed us to outline some areas of development of the methodological foundations for assessing the cyclic and fatigue stability of composites based on cold recycled mixes. Keywords Fatigue resistance • Recycled asphalt pavement (RAP) • Modified cold reclaimed mixes • Styrene-acrylic water dispersion • Water dispersion of epoxy resin • Epoxidized soybean oil * Vitali Zankavich,

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Section: Theoretical Background and Research Methodologymentioning

confidence: 99%

Section: Theoretical Background and Research Methodologymentioning

confidence: 99%

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Zankavich¹,

Khroustalev

Veranko³

et al. 2020

SN Appl. Sci.

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“…Start with, it is necessary to determine the area of research on methods of generalizing information on mass and heat transfer; factual materials and much more besides. The quantity of the patented road materials and the possibilities of experimental research can be brought into compliance by increasing the quality of experimental work or by optimizing the calculations [6][7][8][9][10].…”

Section: Pavement Models and Structuresmentioning

confidence: 99%

Thermodynamic Aspects of Pavement Engineering

et al. 2022

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Scientific and practical calculations on the thermal stability of typical automobile road surface (semi-limited objects) with fluctuations in air temperatures, transitions from positive to negative, with actual heat transfer coefficients, thermal conductivity of components, specific mass isobaric heat capacities, material densities, periods of regular fluctuations are presented. The study shows that temperature fluctuations occur in road surfaces, therefore deformations are brought about in them, generating thermal cracks. Thermal deformations include free, proportional to temperature gradients, stressed deformations due to temperature stresses, characterized by linear thermal expansion coefficients. In road materials, physical and mechanical properties change over time: strength, moduli of elastic longitudinal deformations, shear, transverse deformation coefficients. Thus, the temperature of pavement materials depends on the coordinates, time, and thermophysical characteristics of the materials. Thermal engineering calculations have shown that many road surfaces have limited thermal stability; under the influence of relatively small external influences, they are more stable (supercooled water vapor exists for a short time, turning into a liquid, saturated, supersaturated steam into a superheated liquid, this depends on the radiation characteristics of the surfaces, the presence of external disturbances, etc.). Thus, a complex non-stationary thermal regime takes place, when the temperature fields of the coatings, their gradients of temperature potentials, and masses depend on the boundary conditions of the 1st–4th kind. A citation analysis of the data of the Journal Citation Reports of world scientific serial publications has been developed to carry out research on heat and mass transfer in road surface. The analysis shows that in order to improve the reliability and durability of pavements, fundamental studies of both the physical and technical and thermal properties of all components of road construction mixtures are of great importance.

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“…This, in turn, reduces the environmental impact of the entire repair complex by reducing the frequency of these works. In the same context of reducing the environmental load from the creation of road asphalt concrete pavement, it is necessary to substantiate the possibility of involving waste asphalt concrete in the re-use of materials based on an assessment of changes in the concentration component of ACM exergy [7,8]. The above emphasizes the relevance of an objective quantitative determination of the assessment of thermodynamic efficiency of both ACM heat technology in general and its constituent stages, in particular.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Evaluation of Asphalt Concrete Properties and its Mixing Energy Consumption by Exergy Structure

et al. 2023

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Abstract. The relevance of solving the problem of energy saving, today, is enhanced by the requirements of an environmental nature, united by the term “green energy”. Solving the problems of climate conservation is inseparable from solving the problem of energy saving. Green, hydrogen energy, about which there has been a powerful and aggressive debate over the past decade, turned out to be directions far from solving the problems of both energy saving and environmental protection. The solution of both problems of energy saving and environmental protection at the present time and in the foreseeable future is being solved on the basis of the use of traditional primary energy resources, primarily natural gas. In this regard, the need to solve the problem of quantifying the thermodynamic perfection of heat-technological process for producing an asphalt concrete mixture becomes extremely relevant. This assessment is most simply carried out on the basis of the exergy method of thermodynamic analysis with the determination of the exergy structure of the asphalt concrete mixture flow, including thermomechanical, concentration and reaction components. The value of the concentration component of the exergy of the asphalt concrete mixture allows us to assess the energy efficiency of its production at asphalt concrete plants based on the modern exergy method of thermodynamic analysis; gives a quantitative estimate of the energy consumption for the process of mixing the ingredients of the asphalt concrete mixture in the mixing unit of asphalt concrete plants. The paper defines the structure of the exergy of the asphalt concrete mixture, in which the transit reaction component dominates, which determines the specificity of the exergy of the asphalt concrete mixture. The value of the specific mass concentration component of the exergy of the asphalt concrete mixture in comparison with the thermal component is small and the error in determining the concentration component, which cannot be objectively eliminated, does not affect the results of thermodynamic analysis.

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Structure Formation and Properties of Concrete Based on Organic Hydraulic Binders

Cited by 4 publications

References 14 publications

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Thermodynamic Aspects of Pavement Engineering

Thermodynamic Evaluation of Asphalt Concrete Properties and its Mixing Energy Consumption by Exergy Structure

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