Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash
Hydration of cement with and without fly ash is studied with Mössbauer spectroscopy, XRD, and thermal analysis. Iron in cement is present as Fe3+-ions and occupies two octahedral positions, with close isomer shifts and quadrupole splittings. Iron in fly ash is present as Fe2+ and Fe3+, and the Mössb...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Spectroscopy |
| Online Access: | http://dx.doi.org/10.1155/2013/231843 |
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| author | Vili Lilkov Ognyan Petrov Yana Tzvetanova Plamen Savov Milen Kadiyski |
| author_facet | Vili Lilkov Ognyan Petrov Yana Tzvetanova Plamen Savov Milen Kadiyski |
| author_sort | Vili Lilkov |
| collection | DOAJ |
| description | Hydration of cement with and without fly ash is studied with Mössbauer spectroscopy, XRD, and thermal analysis. Iron in cement is present as Fe3+-ions and occupies two octahedral positions, with close isomer shifts and quadrupole splittings. Iron in fly ash is present as Fe2+ and Fe3+, and the Mössbauer spectra display three doublets—two for Fe3+ in octahedral coordination and one for Fe2+. A third doublet was registered in the hydrating plain cement pastes after the 5th day, due to Fe3+ in tetrahedral coordination in the structure of the newly formed monosulphate aluminate. In cement pastes with fly ash, the doublet of tetrahedral iron is formed earlier because the quantity of ettringite and portlandite is low and more monosulphate crystallizes. No Fe(OH)3 phase forms during hydration of C4AF. The fly ash displays pozzolanic properties, which lead to lowering of the portlandite quantity in the cement mixtures and increasing of the high temperature products. |
| format | Article |
| id | doaj-art-2b8fc7b3837749ad9b6e58fe0b0dfb5d |
| institution | Kabale University |
| issn | 2314-4920 2314-4939 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Spectroscopy |
| spelling | doaj-art-2b8fc7b3837749ad9b6e58fe0b0dfb5d2025-02-03T01:30:53ZengWileyJournal of Spectroscopy2314-49202314-49392013-01-01201310.1155/2013/231843231843Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly AshVili Lilkov0Ognyan Petrov1Yana Tzvetanova2Plamen Savov3Milen Kadiyski4Department of Physics, University of Mining and Geology, 1700 Sofia, BulgariaInstitute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaDepartment of Physics, University of Mining and Geology, 1700 Sofia, BulgariaInstitute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaHydration of cement with and without fly ash is studied with Mössbauer spectroscopy, XRD, and thermal analysis. Iron in cement is present as Fe3+-ions and occupies two octahedral positions, with close isomer shifts and quadrupole splittings. Iron in fly ash is present as Fe2+ and Fe3+, and the Mössbauer spectra display three doublets—two for Fe3+ in octahedral coordination and one for Fe2+. A third doublet was registered in the hydrating plain cement pastes after the 5th day, due to Fe3+ in tetrahedral coordination in the structure of the newly formed monosulphate aluminate. In cement pastes with fly ash, the doublet of tetrahedral iron is formed earlier because the quantity of ettringite and portlandite is low and more monosulphate crystallizes. No Fe(OH)3 phase forms during hydration of C4AF. The fly ash displays pozzolanic properties, which lead to lowering of the portlandite quantity in the cement mixtures and increasing of the high temperature products.http://dx.doi.org/10.1155/2013/231843 |
| spellingShingle | Vili Lilkov Ognyan Petrov Yana Tzvetanova Plamen Savov Milen Kadiyski Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash Journal of Spectroscopy |
| title | Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash |
| title_full | Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash |
| title_fullStr | Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash |
| title_full_unstemmed | Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash |
| title_short | Mössbauer, XRD, and Complex Thermal Analysis of the Hydration of Cement with Fly Ash |
| title_sort | mossbauer xrd and complex thermal analysis of the hydration of cement with fly ash |
| url | http://dx.doi.org/10.1155/2013/231843 |
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