Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Vili Lilkov"'
Publikováno v:
Journal of Spectroscopy, Vol 2013 (2013)
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
Externí odkaz:
https://doaj.org/article/2b8fc7b3837749ad9b6e58fe0b0dfb5d
Autor:
V. Petkova, Ognyan Petrov, Y. Tzvetanova, Ivan Rostovsky, Vili Lilkov, N. Petrova, Daniela Kovacheva
Publikováno v:
Construction and Building Materials. 124:838-845
The carbonation of cement with additions of clinoptilolite and silica fume during the first minutes up to the 24th h of hydration is studied. The crystallization of calcite on the surface proceeds directly between the calcium ions from the solution a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6db3bf0a3c3780a2af8ace18bc986005
https://doi.org/10.1016/j.conbuildmat.2016.07.117
https://doi.org/10.1016/j.conbuildmat.2016.07.117
Publikováno v:
Construction and Building Materials. 60:48-56
The hydration products in cements with individual addition of SF and two types of FA from TEPS and mixtures of FA and SF are studied. The phase transformations are followed in a 4-year period. Fly ashes from TEPS “Bobov Dol” and TEPS “Pernik”
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd27432fa1a424a9bbc95f6384ff3d24
https://doi.org/10.1016/j.conbuildmat.2014.02.045
https://doi.org/10.1016/j.conbuildmat.2014.02.045
Publikováno v:
Journal of Spectroscopy, Vol 2013 (2013)
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b682b0c90fed1551590e3ef615d839e
https://doi.org/10.1155/2013/231843
https://doi.org/10.1155/2013/231843
Publikováno v:
Construction and Building Materials. 29:33-41
Two octahedral Fe 3+ positions with close isomeric displacements and quadrupole splittings were proved for plain cement using Mossbauer spectroscopy. In cements with silica fume iron is registered as two Fe 3+ and one Fe 2+ doublets. Hydrating cement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8542712fdd4f0ecf23f973d0648a43fb
https://doi.org/10.1016/j.conbuildmat.2011.10.030
https://doi.org/10.1016/j.conbuildmat.2011.10.030
Publikováno v:
Clay Minerals. 46:213-223
Cement mortars and concretes incorporating clinoptilolite, silica fume and fly ash were investigated for changes in their physical and mechanical properties. It was found that additions of 10% clinoptilolite and 10% Pozzolite (1:1 mixture of silica f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf45d72ad80d910bbe31c95835c89581
https://doi.org/10.1180/claymin.2011.046.2.213
https://doi.org/10.1180/claymin.2011.046.2.213
Publikováno v:
Clay Minerals. 46:241-250
This paper presents results from comparative thermogravimetric, calorimetric and pozzolanic activity analyses of five natural zeolite samples from Bulgaria, Slovakia, Philippines, USA and North Korea. The zeolites actively participate in the hydratio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8985e185c20f024355c7ba3cfd242350
https://doi.org/10.1180/claymin.2011.046.2.241
https://doi.org/10.1180/claymin.2011.046.2.241
Publikováno v:
Clay Minerals. 46:225-232
Rheological, porosimetric, and SEM studies of cements with additions of natural zeolites (chabazite, mordenite and clinoptilolite) were investigated. The addition of 5% zeolite to cement pastes had a plastifying effect. The increase in the rheologica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3de3445cea5522739a9dcd21e22b0035
https://doi.org/10.1180/claymin.2011.046.2.225
https://doi.org/10.1180/claymin.2011.046.2.225
Publikováno v:
Cement and Concrete Research. 29:1635-1640
Results from studies on the physical and mechanical properties of lightweight and expansive cements cured at 20 and 75°C are presented. Lightweight additive (cenospheres from thermoelectric power station “Bobov Dol,” Bulgaria) and expansive addi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36be9ac4b92d187c7765be0cdba1f9dc
https://doi.org/10.1016/s0008-8846(99)00150-7
https://doi.org/10.1016/s0008-8846(99)00150-7
Publikováno v:
Cement and Concrete Research. 29:1641-1646
The type and quantity of hydration products in cement stone (plain cement, lightweight cement with cenospheres, and cement mixed with expansive additive) hydrated at 20 and 75°C were studied. The changes in the cement stone structure under the influ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08b0e728038b0fc536377c69ef23654c
https://doi.org/10.1016/s0008-8846(99)00149-0
https://doi.org/10.1016/s0008-8846(99)00149-0