Investigation of phase transformations in murzynskiy kaolin in the production of metakaolin
DOI:
https://doi.org/10.15587/1729-4061.2013.14806Keywords:
Murzinskiy kaolin, phase transformations, metakaolin, adsorption activity, the degree of ordering of kaolinite, mullitizationAbstract
The metakaolin is low-fired kaolin chamotte. Due to its high activity to free lime, the metakaolin is of interest to producers of dry building concrete mixtures and refractory ones.
The aim of the work is to research the interconnection of structural order degree and phase composition changing in metakaolin during the firing process.
It has been founded that the degree of structural ordering of Murzinskiy kaolin influences the phase composition of fired metakaolin and crystallization degree of its phases as well as its adsorption activity degree.
The influence of calcination temperature on the adsorption activity value of the murzinskiy metakaolin has been researched.
It is found that the adsorption activity of methakaolin increases with decreasing the degree of ordering of kaolinite in the initial kaolin. Using the kaolin based on imperfect structure of kaolinite leads to partial destruction of layers of kaolinite during the calcination process, its transition into a amorphous aluminosilicate phase and the formation of amorphous oxides of aluminum and silicon, which when mixed with water form mainly Brensted basic centers of adsorption and, in small quantities, Ljuis positive centers.
It is established that increasing the firing temperature of the above 700oC decreases the adsorption activity of metakaolin. It is connected with passivation of the surface of the metakaolin particles due to the activation of the process of crystallization of its main phases, which leads to a decrease in the number of Brensted basic centers. The obtained results are consistent with the results of X-ray phase analysis.
References
- Захаров С. А. Высокоактивный метакаолин – современный минеральный модификатор цементных систем [Текст] / С. А. Захаров, Б. С. Калачик // Строительные материалы. - 2007. - №5.- С.2–3.
- Xiмiчнi i мінеральні добавки в бетон / За заг. ред. О. Ушерова-
- Маршака. — X.: Колорит, 2005. — 280 с
- Дворкин Л.И. Свойства цементных паст с композиционной добавкой для производства литых высокопрочных бетонов [Текст] / Л.И.Дворкин, А.В.Безусяк, И.О.Кириченко // Вісник Донбаської державної академії будівництва та архітектури.- Макіївка: ДонДАБА, 2004.- вип.№1 (143).- т.2:Композиційні матеріали для будівництва.- С.45-49.
- Al-Akhras N.M. Durability of metakaolin to sulfate attack [Текст] // Chem. Concr. Res.-2006.- v36.- N 9.- P. 1727-1734.
- Дворкін І.Й. Метакаолін в будівельних розчинах і бетонах [Текст]
- / І.Й Дворкін, Н.В. Лушнікова, Р.Ф.Рунова, Київ: видавництво КНУБіА, 2007.- 216с.
- Августинник А.И. Керамика [Текст].- Л:Стройиздат, 1975.-592с.
- Шуляк Р.С. Исследование каолина Мурзинского месторождения [Текст] / Шуляк Р.С., Примаченко В.В., Годлевская В.Л., Дышлюк М.М. // Огнеупоры.- 1985.- №11.- С.29 - 34.
- Шуляк Р.С. Исследование трудноспекающегося мурзинского каолина [Текст] / Шуляк Р.С. Примаченко В.В., Карякина Э.Л. // Огнеупоры.- 1990.- №3.- С.20 - 25.
- Зеленюк Т.В. Исследование фазового состава каолина Мурзинского месторождения [Текст] / Зеленюк Т.В., Юдин А.С., Скородумова О.Б.// Вісник Національного технічного університету "ХПІ", 2011.- №59.- С.81 – 86.
- В.М. Гунько. Квантово-химический анализ адсорбции и механизмов химических реакций на поверхности твердых тел [Текст] // Хімія, фізика та технологія поверхні. -2010.- Т.1.- № 1. -С.5–18.
- Zakharov S. A., Kalachik B. S. (2007). High-active methakaolin is a modern mineral modifier of concrete systems. Building materials, 5, 2-3.
- The chemical and mineral additions to cement. Ed by A.V. Usherov-Marshak (2005). Kharkov, Ukraine: Kolorit, 280.
- Dvorkin L.I. (2004). The properties of cement masses containing the compositional addition for high-strength concrete production. Bulletin of the Donbass State Academy of the building and Architecture, 2(143), P.45-49.
- Al-Akhras N.M. (2006). Durability of metakaolin to sulfate attack Chem Concr Res, 36(9), 1727-1734.
- Dvorkin I.Y. , Lushnikova N.V., Runova R.F. (2007). The methakaolin in building solutions and concretes. Kuiv, Ukraine: KhNUBA, 216.
- Avgustinnik A.I. (1975). Ceramics. Leningrad, USSR: Stroyizdat, 592.
- Shulyak R.C., Primachenko V.V., Godlevskaya V.L. (1985). The investigation of Murzinskiy kaolin. Refractories, 11, 29-34.
- Shulyak R.C., Primachenko V.V., Karyakina E.L. (1990). The investigation of hard-sintering murzinskiy kaolin. Refractories, 3, 20-25.
- Zelenyuk T.V., Yudin A.C., Skorodumova O.B. (2011). The research of phase composition of Murzinskiy kaolin. Bulletin of the National Technical University “KPI”, 59, 81-86.
- Gunkoo V.M. (2010). Quantum-cnemical analysis of adsorption process and mechanisms of chemical reactions on solid surfaces Chemistry, Physics and Surface technology, 1(1), 5-18.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2014 Татьяна Владимировна Зеленюк, Ольга Борисовна Скородумова, Татьяна Борисовна Гонтар, Яна Николаевна Гончаренко, Наталья Сергеевна Кайда
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.