Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air
Objective. The paper is aimed at clarifying the mechanism and kinetics of the processes leading to cement caking. Methods. To determine phase composition, the following modern physical and chemical methods were used: XRF, derivatography and electron microscopy. Results. The data obtained show that...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | Russian |
| Published: |
Dagestan State Technical University
2021-07-01
|
| Series: | Вестник Дагестанского государственного технического университета: Технические науки |
| Subjects: | |
| Online Access: | https://vestnik.dgtu.ru/jour/article/view/940 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849691414745579520 |
|---|---|
| author | A. A. Krutilin T. V. Krapchetova N. A. Inkova O. K. Pakhomova |
| author_facet | A. A. Krutilin T. V. Krapchetova N. A. Inkova O. K. Pakhomova |
| author_sort | A. A. Krutilin |
| collection | DOAJ |
| description | Objective. The paper is aimed at clarifying the mechanism and kinetics of the processes leading to cement caking. Methods. To determine phase composition, the following modern physical and chemical methods were used: XRF, derivatography and electron microscopy. Results. The data obtained show that the “aging” of cements during their forced storage in humid air through the adsorption of water vapor, and then CO2, is associated with the processes of hydrolysis, hydration in surface layers of particles, is primarily relevant for the most reactive minerals of Portland cement clinker. The deepening of these processes also depends on the state of the corroded surface of minerals. Conclusion. The work carried out makes it is possible to preliminarily outline storage conditions for freshly ground Portland cements (according to the kinetics of sorption – the storage duration, according to isotherms – the permissible relative humidity), at which the LOI value of commercial cement remains stable for the required minimum time. |
| format | Article |
| id | doaj-art-d9e77f727fe2422faefaca3292523b99 |
| institution | DOAJ |
| issn | 2073-6185 2542-095X |
| language | Russian |
| publishDate | 2021-07-01 |
| publisher | Dagestan State Technical University |
| record_format | Article |
| series | Вестник Дагестанского государственного технического университета: Технические науки |
| spelling | doaj-art-d9e77f727fe2422faefaca3292523b992025-08-20T03:21:02ZrusDagestan State Technical UniversityВестник Дагестанского государственного технического университета: Технические науки2073-61852542-095X2021-07-0148210311210.21822/2073-6185-2021-48-2-103-112640Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet airA. A. Krutilin0T. V. Krapchetova1N. A. Inkova2O. K. Pakhomova3Volgograd State Technical University (Sebryakov Branch)Sebryakovtsement JSCVolgograd State Technical University (Sebryakov Branch)Volgograd State Technical University (Sebryakov Branch)Objective. The paper is aimed at clarifying the mechanism and kinetics of the processes leading to cement caking. Methods. To determine phase composition, the following modern physical and chemical methods were used: XRF, derivatography and electron microscopy. Results. The data obtained show that the “aging” of cements during their forced storage in humid air through the adsorption of water vapor, and then CO2, is associated with the processes of hydrolysis, hydration in surface layers of particles, is primarily relevant for the most reactive minerals of Portland cement clinker. The deepening of these processes also depends on the state of the corroded surface of minerals. Conclusion. The work carried out makes it is possible to preliminarily outline storage conditions for freshly ground Portland cements (according to the kinetics of sorption – the storage duration, according to isotherms – the permissible relative humidity), at which the LOI value of commercial cement remains stable for the required minimum time.https://vestnik.dgtu.ru/jour/article/view/940mechanism and kinetics of processesphase compositionphysical and chemical methodsderivatographyelectron microscopysorption |
| spellingShingle | A. A. Krutilin T. V. Krapchetova N. A. Inkova O. K. Pakhomova Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air Вестник Дагестанского государственного технического университета: Технические науки mechanism and kinetics of processes phase composition physical and chemical methods derivatography electron microscopy sorption |
| title | Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air |
| title_full | Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air |
| title_fullStr | Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air |
| title_full_unstemmed | Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air |
| title_short | Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air |
| title_sort | research of physical and chemical processes associated with corrosion of cements caking in dampy wet air |
| topic | mechanism and kinetics of processes phase composition physical and chemical methods derivatography electron microscopy sorption |
| url | https://vestnik.dgtu.ru/jour/article/view/940 |
| work_keys_str_mv | AT aakrutilin researchofphysicalandchemicalprocessesassociatedwithcorrosionofcementscakingindampywetair AT tvkrapchetova researchofphysicalandchemicalprocessesassociatedwithcorrosionofcementscakingindampywetair AT nainkova researchofphysicalandchemicalprocessesassociatedwithcorrosionofcementscakingindampywetair AT okpakhomova researchofphysicalandchemicalprocessesassociatedwithcorrosionofcementscakingindampywetair |