Influence of silicons of different structures on the hydration of compositional cements

Authors

DOI:

https://doi.org/10.15587/2312-8372.2018.148312

Keywords:

silica of various structure, composite cement, setting time, normal density, hydration processes

Abstract

The object of research is cement, which contains in its composition silica of various structures. The increase in the production of composite cements leads to the need to search for new active mineral additives. At the moment, the choice of mineral additives is made without taking into account the state in which the silicate component is located, therefore, it is necessary to develop certain criteria for the targeted selection of possible materials. This will reduce the cost of labor and financial resources to conduct relevant research.

As it is known, silicates can be in a crystalline, amorphous and glassy state; therefore, the reactivity of various additives, even with the same chemical composition, can also differ significantly. It is proposed to study the effect of silica structure on hydration processes and properties of cements.

The effect of silica in a different phase state (crystalline, amorphous, and glassy) on the hardening processes and physico-mechanical properties of composite cements has been investigated. It is established that the crystallinity degree of silica significantly affects the normal density of cement paste. Thus, the introduction of crystalline silica increases the normal thickness by 0.1–1.1 %, amorphous by 12.3–136.1 %, glassy by 11.2–56.2 %, compared with non-additive cement. The setting time of cement paste varies slightly.

In the early stages of hardening, the rate of drop in strength is highest with the introduction of amorphous silica. For example, when enter 10 wt. % of crystalline silica shows a slight increase in the strength of the samples, compared with 8.2 % non-additive cement. The same amount of amorphous silica additive reduces strength by 33 %, glassy silica – by 19.2 %. This trend continues with increasing content of additives.

The obtained research results allow to conclude that it is most appropriate to use in the production of composite cements mineral additives containing in their composition silica phases in a crystalline and glassy state.

Author Biographies

Vladimir Sokoltsov, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

Engineer

Department of Chemical Technology of Composite Materials

Volodymyr Tokarchuk, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

PhD, Associate Professor

Department of Chemical Technology of Composite Materials

Valentin Sviderskyi, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Chemical Technology of Composite Materials

References

  1. Babachev, G. N. (1987). Zoly i shlaki v proizvodstve stroitel'nykh materialov. Kyiv: Budіvelnik, 136.
  2. Kaushanskiy, V. E. (2000). Ispol'zovanie tekhnogennykh materialov dlya ekonomii energosyr'evykh resursov v tekhnologii tsementov. II Mezhdunarodnoe soveshhanie po khimii i tekhnologi tsementa, 2, 133–140.
  3. Sokoltsov, V. Yu., Tokarchuk, V. V., Sviderskyi, V. A. (2015). Hardening peculiarities of blended cements with silicate admixtures of different origin. Eastern-European Journal of Enterprise Technologies, 3 (11 (75)), 9–14. doi: http://doi.org/10.15587/1729-4061.2015.43460
  4. DSTU B V.2.7-46:2010. Tsementy zahalnobudivelnoho pryznachennia. Tekhnichni umovy (2011). Kyiv: DP «Ukrarkhbudinform», 20.
  5. Guetteche, M. N., Zergua, A., Hannachi, S. (2012). Investigating the Local Granulated Blast Furnace Slag. Open Journal of Civil Engineering, 2 (1), 10–15. doi: http://doi.org/10.4236/ojce.2012.21002
  6. Tokyay, M. (2016). Cement and Concrete Mineral Admixtures. CRC Press, 334. doi: http://doi.org/10.1201/b20093
  7. Małolepszy, J., Stępień, P. (2015). The Influence of Gaize Addition on Sulphate Corrosion of CEM II/A and CEM II/B Cements. Procedia Engineering, 108, 270–276. doi: http://doi.org/10.1016/j.proeng.2015.06.147
  8. Al-Rezaiqi, J., Alnuaimi, A., Hago, A. W. (2018). Efficiency factors of burnt clay and cement kiln dust and their effects on properties of blended concrete. Applied Clay Science, 157, 51–64. doi: http://doi.org/10.1016/j.clay.2018.01.040
  9. Al-Fadala, S., Chakkamalayath, J., Al-Bahar, S., Al-Aibani, A., Ahmed, S. (2017). Significance of performance based specifications in the qualification and characterization of blended cement using volcanic ash. Construction and Building Materials, 144, 532–540. doi: http://doi.org/10.1016/j.conbuildmat.2017.03.180
  10. Unčík, S., Kmecová, V. (2013). The Effect of Basalt Powder on the Properties of Cement Composites. Procedia Engineering, 65, 51–56. doi: http://doi.org/10.1016/j.proeng.2013.09.010
  11. Munshi, S., Dey, G., Prasad Sharma, R. (2013). Use of Rice Straw Ash as Pozzolanic Material in Cement Mortar. International Journal of Engineering and Technology, 5, 603–606. doi: http://doi.org/10.7763/ijet.2013.v5.626
  12. Memon, S. A., Khan, M. K. (2018). Ash blended cement composites: Eco-friendly and sustainable option for utilization of corncob ash. Journal of Cleaner Production, 175, 442–455. doi: http://doi.org/10.1016/j.jclepro.2017.12.050
  13. Lin, K. L., Lin, D. F. (2006). Hydration characteristics of municipal solid waste incinerator bottom ash slag as a pozzolanic material for use in cement. Cement and Concrete Composites, 28 (9), 817–823. doi: http://doi.org/10.1016/j.cemconcomp.2006.03.003
  14. Vouk, D., Serdar, M. (2017). Use of incinerated sewage sludge ash in cement mortars: case study in Croatia. Tehnicki Vjesnik – Technical Gazette, 24 (1), 41–53. doi: http://doi.org/10.17559/tv-20150901095705
  15. Canpolat, F., Yılmaz, K., Köse, M. M., Sümer, M., Yurdusev, M. A. (2004). Use of zeolite, coal bottom ash and fly ash as replacement materials in cement production. Cement and Concrete Research, 34 (5), 731–735. doi: http://doi.org/10.1016/s0008-8846(03)00063-2

Downloads

Published

2018-05-31

How to Cite

Sokoltsov, V., Tokarchuk, V., & Sviderskyi, V. (2018). Influence of silicons of different structures on the hydration of compositional cements. Technology Audit and Production Reserves, 6(3(44), 4–8. https://doi.org/10.15587/2312-8372.2018.148312

Issue

Vol. 6 No. 3(44) (2018): Chemical engineering

Section

Chemical and Technological Systems: Original Research

License

Copyright (c) 2018 Vladimir Sokoltsov, Volodymyr Tokarchuk, Valentin Sviderskyi

Creative Commons License

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.