Mechanical and electrical properties of concrete modified by carbon nanoparticles
The article presents the study of obtaining electrically conductive concrete using carbon nanoparticles obtained by processing coal in an electric-discharge plasma reactor. An electric-discharge method for producing a sedimentation-resistant and highly dispersed suspension consists in treating coal...
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2019-12-01
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| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/14.pdf |
| _version_ | 1819162997065515008 |
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| author | L.A. Urkhanova S.L. Buyantuev A.A. Urkhanova S.A. Lkhasaranov G.R. Ardashova R.S. Fediuk A.P. Svintsov I.A. Ivanov |
| author_facet | L.A. Urkhanova S.L. Buyantuev A.A. Urkhanova S.A. Lkhasaranov G.R. Ardashova R.S. Fediuk A.P. Svintsov I.A. Ivanov |
| author_sort | L.A. Urkhanova |
| collection | DOAJ |
| description | The article presents the study of obtaining electrically conductive concrete using carbon nanoparticles obtained by processing coal in an electric-discharge plasma reactor. An electric-discharge method for producing a sedimentation-resistant and highly dispersed suspension consists in treating coal powder with an electric current in an aqueous medium. Using laser diffraction, it was found that carbon nanoparticles have a particle size in the range from 50 to 500 nm. The microstructure of hardened cement paste was studied using SEM. The compressive strength was tested on cubes with an edge of 100 mm according to EN 12390-6. Determination of the electrical resistance of concrete was carried out on specimens with an edge of 100 mm, placed between two brass plates, through which direct current was passed. The optimum content of carbon nanoparticles (0.01–0.1 % wt.) in the binder is evaluated, which allows to obtain high mechanical properties (30–35 % higher compressive strength compared to a control specimen. It is proved that the mechanism of action of nanoscale modifiers is most manifested in small doses. The dependences of the physicomechanical properties of Portland cement upon the addition of various amounts of carbon nanoparticles are determined. Physicomechanical and exploitation properties of heavyweight electrically conductive concrete are determined. The kinetics of changes in the electrical resistance of concrete at different curing periods is established. |
| first_indexed | 2024-12-22T17:37:07Z |
| format | Article |
| id | doaj.art-d620e4e98f514eec8b7570c2639a7fe4 |
| institution | Directory Open Access Journal |
| issn | 2071-0305 |
| language | English |
| last_indexed | 2024-12-22T17:37:07Z |
| publishDate | 2019-12-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-d620e4e98f514eec8b7570c2639a7fe42022-12-21T18:18:30ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052019-12-0192816317210.18720/MCE.92.14Mechanical and electrical properties of concrete modified by carbon nanoparticlesL.A. Urkhanova0https://orcid.org/0000-0002-2716-2144S.L. Buyantuev1https://orcid.org/0000-0001-7077-8836A.A. Urkhanova2https://orcid.org/0000-0003-0690-1275S.A. Lkhasaranov3https://orcid.org/0000-0002-1399-2833G.R. Ardashova4https://orcid.org/0000-0001-6103-3808R.S. Fediuk5https://orcid.org/0000-0002-2279-1240A.P. Svintsov6https://orcid.org/0000-0003-0564-3307I.A. Ivanov7https://orcid.org/0000-0002-5299-8920East Siberia State University of Technology and ManagementEast Siberia State University of Technology and ManagementEast Siberia State University of Technology and ManagementEast Siberia State University of Technology and ManagementEast Siberia State University of Technology and ManagementFar Eastern Federal UniversityPeoples' Friendship University of RussiaEast Siberia State University of Technology and ManagementThe article presents the study of obtaining electrically conductive concrete using carbon nanoparticles obtained by processing coal in an electric-discharge plasma reactor. An electric-discharge method for producing a sedimentation-resistant and highly dispersed suspension consists in treating coal powder with an electric current in an aqueous medium. Using laser diffraction, it was found that carbon nanoparticles have a particle size in the range from 50 to 500 nm. The microstructure of hardened cement paste was studied using SEM. The compressive strength was tested on cubes with an edge of 100 mm according to EN 12390-6. Determination of the electrical resistance of concrete was carried out on specimens with an edge of 100 mm, placed between two brass plates, through which direct current was passed. The optimum content of carbon nanoparticles (0.01–0.1 % wt.) in the binder is evaluated, which allows to obtain high mechanical properties (30–35 % higher compressive strength compared to a control specimen. It is proved that the mechanism of action of nanoscale modifiers is most manifested in small doses. The dependences of the physicomechanical properties of Portland cement upon the addition of various amounts of carbon nanoparticles are determined. Physicomechanical and exploitation properties of heavyweight electrically conductive concrete are determined. The kinetics of changes in the electrical resistance of concrete at different curing periods is established.https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/14.pdfcementscement-based compositesbindersconcretescarbon nanoparticles |
| spellingShingle | L.A. Urkhanova S.L. Buyantuev A.A. Urkhanova S.A. Lkhasaranov G.R. Ardashova R.S. Fediuk A.P. Svintsov I.A. Ivanov Mechanical and electrical properties of concrete modified by carbon nanoparticles Инженерно-строительный журнал cements cement-based composites binders concretes carbon nanoparticles |
| title | Mechanical and electrical properties of concrete modified by carbon nanoparticles |
| title_full | Mechanical and electrical properties of concrete modified by carbon nanoparticles |
| title_fullStr | Mechanical and electrical properties of concrete modified by carbon nanoparticles |
| title_full_unstemmed | Mechanical and electrical properties of concrete modified by carbon nanoparticles |
| title_short | Mechanical and electrical properties of concrete modified by carbon nanoparticles |
| title_sort | mechanical and electrical properties of concrete modified by carbon nanoparticles |
| topic | cements cement-based composites binders concretes carbon nanoparticles |
| url | https://engstroy.spbstu.ru/userfiles/files/2019/8(92)/14.pdf |
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