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Vibrations in engineering and technology

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 4(111)

Published: 2023.12.02
DOI: 10.37128/2306-8744-2023-4


Description:
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.

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ESTIMATION OF THE MAXIMUM TEMPERATURE REACHED DURING THE HARDENING OF CONCRETE

DOI: 10.37128/2306-8744-2023-4-12
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Yakivchuk Serhii - graduate student at the Vinnytsia National Agrarian University (3 Sonyachna St., Vinnytsia, 21008, Ukraine, e-mail: SergiiYakivchuk7@gmail.com, https://orcid.org/0000-0002-0157-1812).

Shvets Ludmila – Ph.D., Associate Professor, Department of Agricultural Engineering and Technical Service Vinnytsia National Agrarian University (Sunny str., 3, Vinnytsia, Ukraine, 21008, e-mail: shlv0505@i.ua, https://orcid.org/0000-0002-4364-0126).

 

 

 

Annotation

In the conditions of growing environmental problems and increasing energy consumption, the development of new technologies for manufacturing building structures is an important task of the construction industry. One of the key factors that affects the quality and duration of use of building materials is heat treatment of concrete. This process has a positive effect on a number of material parameters, such as strength, frost resistance, waterproofing and durability.

However, in conditions of excessive electricity consumption, the need to reduce energy costs in the production process becomes urgent. Accordingly, the development of new technologies should include strategies to reduce energy consumption and optimize technological cycles.

In Ukraine, as in other countries, the issue of rational use of energy is of great importance. Taking into account the peculiarities of the country's energy sector, an important direction is the use of alternative energy sources. This opens the way to the development of sustainable and efficient construction that takes into account the environmental and energy requirements of the present.

In search of optimal ways to improve the properties of concrete, which determine its reliability and durability, scientists pay attention to the complex influence of various factors. In particular, vibration, excess pressure, temperature regimes and chemical additives play a key role in improving the quality characteristics of concrete. These methods make it possible not only to significantly improve its strength, but also to provide excellent strength of conventional materials, improve resistance to wear and aggressive environments.

In modern conditions, when competition in the field of concrete products production is high, it is important to find a balance between achieving high technical characteristics of the material and maintaining economic feasibility. The use of high-quality fillers and high-quality binders increases the strength of concrete, but this can lead to an increase in the cost of the product and a decrease in its competitiveness.

Unfortunately, one of the urgent problems is the decrease in production of high-quality raw materials for the construction industry. Many deposits have been exploited or exhausted, which jeopardizes the stable supply of high-quality binders and aggregates.

In light of these challenges, it is extremely important to look for internal reserves to increase the strength of concrete. The use of local building materials and optimization of processes can be the answer to these problems. The application of innovative production methods and the use of alternative energy sources can contribute to the sustainable and ecologically balanced development of the construction industry, saving resources and reducing the negative impact on the environment.

 

Keywords: concrete, strength, weather resistance, water permeability, durability, thermopower technology.

List of references

1. E. Gallucci, X. Zhang, K.L. Scrivener. (2013). Effect of temperature on the microstructure of calcium silicate hydrate (C-S-H), Cem. Concr. Res. 53. Р. 185–195. https://doi.org/10.1016/j.cemconres.2013.06.008. [in English].

2. I. Pane, W. Hansen. (2005).  Investigation of blended cement hydration by isothermal ca-lorimetry and thermal analysis, Cem. Concr. Res. 35. Р. 1155–1164, https://doi.org/10.1016/j.cemconres.2004.10.027. [in English].

3. B. Lothenbach, F. Winnefeld, C. Alder, E. Wieland, P. Lunk. (2007).  Effect of temperature on the pore solution, microstructure and hydration products of Portland cement pastes, Cem. Concr. Res. 37. Р. 483–491. https://doi.org/10.1016/j.cemconres.2006.11.016. [in English].

4. I. Elkhadiri, M. Palacios, F. Puertas. (2009). Effect of curing temperature on cement hy-dration, Ceram. - Silikaty. 53. Р. 65–75. [in English].

5. P. Rossi, J.P. Charron, M. Bastien-Masse, J.L. Tailhan, F. Le Maou, S. Ramanich. (2014). Tensile basic creep versus compressive basic creep at early ages: comparison be- tween normal strength concrete and a very high strength fiber reinforced concrete, Mater. Struct. 47. Р. 1773–1785. [in English].

6. G. Sant. (2012). The influence of temperature on autogenous volume changes in cementi-tious materials containing shrinkage reducing admixtures, Cem. Concr. Compos. 34. Р. 855–865, https://doi.org/10.1016/j.cemconcomp.2012.04.003. [in English].

7. A. Aili, M. Vandamme, J.-M. Torrenti, B. Masson. (2018).  Is long-term autogenous shrinkage a creep phenomenon induced by capillary effects due to self-desiccation? Cem. Concr. Res. 108. Р. 186–200. https://doi.org/10.1016/J.CEMCONRES.2018.02.023. [in English].

8. P. Turcry, A. Loukili, L. Barcelo, J.M. Casabonne. (2002) Can the maturity concept be used to separate the autogenous shrinkage and thermal deformation of a cement paste at early age? Cem. Concr. Res. 32. Р. 1443–1450, https://doi.org/10.1016/S0008-8846(02)00800-1. [in English].

9. M. Kazemi Kamyab, (2013) Autogenous Shrinkage and Hydration Kinetics of SH-UHPFRC Under Moderate to Low Temperature Curing Conditions, Doctoral thesis No: 5681 Ecole Polytechnique Fédérale de Lausanne, Switzerland. Р. 57-86. [in English].

10. C. Jiang, Y. Yang, Y. Wang, Y. Zhou, C. Ma. (2014) Autogenous shrinkage of high perfor-mance concrete containing mineral admixtures under different curing tempera-tures, Constr. Build. Mater. 61. Р. 260–269, https://doi.org/10.1016/j.conbuildmat.2014.03.023. [in English].

11. A.M. Soliman, M.L. Nehdi. (2011). Effect of drying conditions on autogenous shrinkage in ultra-high performance concrete at early-age, Mater. Struct. 44. Р. 879–899, https://doi.org/10.1617/s11527-010-9670-0. [in English].

12. Ç. Yalçınkaya, H. Yazıcı. (2017).  Effects of ambient temperature and relative humidity on early-age shrinkage of UHPC with high-volume mineral admixtures, Constr. Build. Mater. 144. Р. 252–259,. https://doi.org/10.1016/j.conbuildmat.2017.03.198. [in English].

13. A. Kamen, E. Denarié, H. Sadouki, E. Brühwiler. (2009). Evaluation of UHPFRC activation energy using empirical models, Mater. Struct. 42. Р.  527–537, https://doi.org/10.1617/s11527-008-9400-z. [in English].

14. R. Derabla and M. L. Benmalek,(2014).  “Characterization of heattreated self-compacting concrete containing mineral admixtures at early age and in the long term,” Constr. Build. Mater., vol. 66. Р.  787–794 [in English].

15. M. S. Khan and H. Abbas. (2014). “Effect of elevated temperature on the behavior of high volume fly ash concrete,” KSCE J. Civ. Eng. Dec. 2014. Р. 128-136. [in English].

16. K. N. Vishwanath Prof., S. Narayana Dr., and V. Bindiganavile Dr., (2014). “Influence of sustained elevated temperature on fly ash concrete,” Indian Concr. J., vol. 88, no. 1, Р. 26–32. [in English].

17. A. Omran, Z. He, and G. Long. (2012).  “Heat damage of steam curing on the surface layer of concrete,” Mag. Concr. Res., vol. 64, no. 11, Nov. 2012. P. 995–1004, [in English].

18. L. T. Phan. (2008). “Pore pressure and explosive spalling in concrete,” Mater. Struct., vol. 41, no. 10. P. 1623–1632 [in English].

 

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About journal

Topics of the journal:

The journal "Vibrations   in engineering  and technology" presents materials on the following issues

• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production

The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine

(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)

Old version of the site: http://vibrojournal.vsau.edu.ua/

The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:

 

 

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Key information:
ISSN (print): 2306-8744
DOI: 10.37128/2306-8744

The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University

Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition  : (mixed languages) Ukrainian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
 Subscription Index is  99720.

 

Old version of site: http://vibrojournal.vsau.edu.ua/

History of journal:

In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published  94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M  PhD , professor, academician NAAS is the chief editor of the "Vibrations in engineering  and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.