Hardening peculiarities of blended cements with silicate admixtures of different origin
DOI:
https://doi.org/10.15587/1729-4061.2015.43460Keywords:
cement, mineral admixtures, acid-base balance, processing waste, normal density, hydration, hardening, propertiesAbstract
The influence of silicate-containing materials of different origin on cement properties was investigated. Selected mineral silicate-containing admixtures have significant differences in the chemical and mineralogical composition.
It was found that the cement hardening rate is affected by the condition of silicate and aluminate admixture component. The presence of amorphous silica or glass in the admixture leads to a slow strength gain of cements in early hardening periods, and the introduction of heat-treated materials with high thermoactivated aluminate content into cements allows to significantly accelerate the process.
Using natural silicate-containing materials (flask, tripoli, zeolite) in the production of blended cements is limited by high values of normal cement density that indirectly affects the ultimate cement strength.
The study of the processes taking place in early hydration stages allows to evaluate the admixture effectiveness and predict cement properties. Kinetics of changes in pH of an aqueous solution of cements can be used as a criterion.
Thus, introducing several admixtures that would have a positive impact on the sample strength in early hardening periods and grade cement strength is advisable in selecting compositions of blended cements. It was proposed to use rock dump processing waste of coal mining as a mineral admixture in cement production.References
- Sobol, Kh. S., Markiv, T. E., Sanytsky, M. A., Koguch, G. V. (2003). Influence of active mineral admixtures on the blended cements properties. Visnyk Hatsionalnogo universytetu “Lvivska polytekhnika”. Chemistry, technology of substances and their use, 488, 274–278.
- Sanytsky, M., Sobol, Kh., Markiv, T., Bialczak, W. (2004). Composite cements for energy-saving concrete technologies. Praca zbiorowa «Budownictvo o zoptymalizowanym potencjale energetycnym». Czestochowa, 373–377.
- Zdorov, A. I. (1991). Mineral admixtures and their rational utilization. Tsement. Moscow, 24–27.
- El-Hasan, T., Al-Hamaideh, H. (2012). Characterization and possible industrial application of Tripoli outcrops at Al-Karak Province. Jordan Journal of Earth and Environmental Sciences. Jordan, 63–66.
- Jana, D. (2007). A new look to an old pozzolan: clinoptiolite – a promising pozzolan in concrete. Proceedings of the twenty-ninth conference on cement microscopy. Quebec city, PQ, Canada. Available at: http://www.bearriverzeolite.com/images_new/DipayanJana.pdf
- Yoleva, A., Djambazov, S., Chernev, G. (2011). Influence of the pozzolanic additives trass and zeolite on cement properties. Journal of the University of Chemical Technology and Metallurgy. Bulgaria, 261–266.
- LaBarca, I. K., Foley, R. D., Cramer, S. M. (2007). Effects of ground granulated blast furnace slag in Portland cement concrete (PCC) – Expanded study. Final report. USA. Available at: http://wisdotresearch.wi.gov/wp-content/uploads/05-01slagexpanded-fr1.pdf
- Lewls, D. W. (1981). History of slag cements [online resource]. Presented at University of Alabama Slag Cement Seminar. USA. Available at: http://www.nationalslag.org/sites/nationalslag/files/documents/nsa_181-6_history_of_slag_cements.pdf
- Joshi, R. C., Lohita, R. P. (1997). Fly ash in concrete: production, properties and uses. USA, 128.
- Frías, M., Sanchez de Rojas, M. I., García, R., Juan Valdés, A., Medina, C. (2012). Effect of activated coal mining wastes on the properties of blended cement. Cement and Concrete Composites, 34 (5), 678–683. doi: 10.1016/j.cemconcomp.2012.02.006
- Leonov, P. A., Zurnaci, B. A. (1970). Spoil heaps of coal mines. Moscow: Nedra, 112.
- Deryagin, B. V., Zakhavaeva, M. V., Talaev, M. V. (1955). Device for determining the coefficient of filtration and capillary impregnation of porous and dispersed materials (handbook). Moscow (Russia), 11.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2015 Володимир Володимирович Токарчук, Володимир Юрійович Сокольцов, Валентин Анатолійович Свідерський
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.