Mathematical modeling of the colmatation of concrete pores during corrosion
Pore colmatation plays a positive role, since the decrease in the permeability of cement concrete due to the deposition of insoluble corrosion products in the pores leads to a slowdown in corrosion processes. The mathematical model of concrete pore colmatation based on the mass transfer equations is...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Peter the Great St. Petersburg Polytechnic University
2018-11-01
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| Series: | Инженерно-строительный журнал |
| Subjects: | |
| Online Access: | https://engstroy.spbstu.ru/en/article/2018.83.18/ |
| _version_ | 1818610202071531520 |
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| author | Sergey Fedosov Varvara Rumyantseva Igor Krasilnikov Viktoriya Konovalova Artem Evsyakov |
| author_facet | Sergey Fedosov Varvara Rumyantseva Igor Krasilnikov Viktoriya Konovalova Artem Evsyakov |
| author_sort | Sergey Fedosov |
| collection | DOAJ |
| description | Pore colmatation plays a positive role, since the decrease in the permeability of cement concrete due to the deposition of insoluble corrosion products in the pores leads to a slowdown in corrosion processes. The mathematical model of concrete pore colmatation based on the mass transfer equations is given, which allows to estimate the depth of corrosion damage of concretes in media of various degrees of aggressiveness. The presented model describes the rate of advance of the deposition zone of corrosion products depending on the conditions of the corrosion process. Mathematical models of the kinetics and dynamics of mass transfer accompanied by a decrease in permeability during chemical corrosion of cement stone are presented. Equations are obtained for determining the rate of advancement of the colmatation zone and the thickness of the colmatant layer during concrete corrosion. The dependence of the rate of clogging of pores and capillaries and the thickness of the sediment layer on the change in mass transfer characteristics, taking into account the porosity of the bedding layer, is shown. Graphic dependences of the rate of advancement of the colmatage zone and the thickness of the layer of corrosion products are obtained at the established porosity of the layer for cases of linear and exponential changes in the mass diffusivity coefficient over time. The obtained graphic dependences show that the intensity of the colmatation process decreases, and also illustrate a significant decrease in the intensity of the process with a slight decrease in the porosity of the sediment layer. |
| first_indexed | 2024-12-16T15:10:41Z |
| format | Article |
| id | doaj.art-6c44aff559fa4a7a94116e401e372e0e |
| institution | Directory Open Access Journal |
| issn | 2071-0305 |
| language | English |
| last_indexed | 2024-12-16T15:10:41Z |
| publishDate | 2018-11-01 |
| publisher | Peter the Great St. Petersburg Polytechnic University |
| record_format | Article |
| series | Инженерно-строительный журнал |
| spelling | doaj.art-6c44aff559fa4a7a94116e401e372e0e2022-12-21T22:26:58ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052018-11-0183719820710.18720/MCE.83.18Mathematical modeling of the colmatation of concrete pores during corrosionSergey Fedosov0Varvara Rumyantseva1Igor Krasilnikov2Viktoriya Konovalova3Artem Evsyakov4Ivanovo State Polytechnic UniversityIvanovo State Polytechnic UniversityIvanovo State Polytechnic UniversityIvanovo State Polytechnic UniversityIvanovo State Polytechnic UniversityPore colmatation plays a positive role, since the decrease in the permeability of cement concrete due to the deposition of insoluble corrosion products in the pores leads to a slowdown in corrosion processes. The mathematical model of concrete pore colmatation based on the mass transfer equations is given, which allows to estimate the depth of corrosion damage of concretes in media of various degrees of aggressiveness. The presented model describes the rate of advance of the deposition zone of corrosion products depending on the conditions of the corrosion process. Mathematical models of the kinetics and dynamics of mass transfer accompanied by a decrease in permeability during chemical corrosion of cement stone are presented. Equations are obtained for determining the rate of advancement of the colmatation zone and the thickness of the colmatant layer during concrete corrosion. The dependence of the rate of clogging of pores and capillaries and the thickness of the sediment layer on the change in mass transfer characteristics, taking into account the porosity of the bedding layer, is shown. Graphic dependences of the rate of advancement of the colmatage zone and the thickness of the layer of corrosion products are obtained at the established porosity of the layer for cases of linear and exponential changes in the mass diffusivity coefficient over time. The obtained graphic dependences show that the intensity of the colmatation process decreases, and also illustrate a significant decrease in the intensity of the process with a slight decrease in the porosity of the sediment layer.https://engstroy.spbstu.ru/en/article/2018.83.18/colmatationcolmatation of porescorrosion of concretemathematical modelingcolmatation model |
| spellingShingle | Sergey Fedosov Varvara Rumyantseva Igor Krasilnikov Viktoriya Konovalova Artem Evsyakov Mathematical modeling of the colmatation of concrete pores during corrosion Инженерно-строительный журнал colmatation colmatation of pores corrosion of concrete mathematical modeling colmatation model |
| title | Mathematical modeling of the colmatation of concrete pores during corrosion |
| title_full | Mathematical modeling of the colmatation of concrete pores during corrosion |
| title_fullStr | Mathematical modeling of the colmatation of concrete pores during corrosion |
| title_full_unstemmed | Mathematical modeling of the colmatation of concrete pores during corrosion |
| title_short | Mathematical modeling of the colmatation of concrete pores during corrosion |
| title_sort | mathematical modeling of the colmatation of concrete pores during corrosion |
| topic | colmatation colmatation of pores corrosion of concrete mathematical modeling colmatation model |
| url | https://engstroy.spbstu.ru/en/article/2018.83.18/ |
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