Design of the composition of alkali activated portland cement using mineral additives of technogenic origin

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.140324

Keywords:

alkali activated cement, composite cement, related products, waste disposal, red mud, alkaline activation

Abstract

This paper reports results of the development of cement compositions and production technology for common cement systems "portland cement clinker – mineral additives – alkaline activator – water-reducing admixture", which contain more than 60 % by weight of mineral additives. The additives have been selected from the group: granulated blast furnace slag, ash from thermal power plants (fly ash and disposed ash) and red mud (waste of alumina production). The relevance of the work relates to the need to improve a number of indicators that limit the widespread application of traditional cements, highly filled with waste (slag portland cement), in particular, early strength and setting terms.

We have devised basic principles of the structural arrangement of cement compositions, as well as show the technology of their production. It was established that in terms of the requirements based on acting Ukrainian and European standards, in particular EN 197-1, the designed cements are not inferior to the EN cements, CEM I, CEM II, CEM III, in their characteristics, but even outperform them for strength. The developed cement compositions, which contain the portland clinker in the amount not exceeding 40 % by weight, meet the requirements of the EN standard for the classes of compressive strength (at the age of 28 days) 32,5N − 32,5R; 42,5R − 52,5R.

We have investigated the influence of alkaline components on the structure formation processes of artificial stone in the alkaline activated cement at different levels. It was established that an increase in the alkalinity of a cement environment predetermines a decrease in the basicity of the phase composition of neo formations of cement at the micro level, as well as contributes to increasing the total porosity of an artificial stone, which, at the same time, tends to closing and decreases over time.

Author Biographies

Pavel Krivenko, Kyiv National University of Construction and Architecture Povitroflotskyi ave., 31, Kyiv, Ukraine, 03037

Doctor of Technical Sciences, Professor

Scientific Research Institute for Binders and Materials

Oleg Petropavlovskyi, Kyiv National University of Construction and Architecture Povitroflotskyi ave., 31, Kyiv, Ukraine, 03037

PhD, Senior researcher

Scientific Research Institute for Binders and Materials

Oleksandr Kovalchuk, Kyiv National University of Construction and Architecture Povitroflotskyi ave., 31, Kyiv, Ukraine, 03037

PhD, Senior researcher

Scientific Research Institute for Binders and Materials

Svitlana Lapovska, State Enterprise "Ukrainian Research and Design Institute of building materials and products" Kostiantynivska str., 68, Kyiv, Ukraine, 04080

Doctor of Technical Sciences, Senior researcher

Anton Pasko, Kyiv National University of Construction and Architecture Povitroflotskyi ave., 31, Kyiv, Ukraine, 03037

PhD

Scientific Research Institute for Binders and Materials

References

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Published

2018-08-09

How to Cite

Krivenko, P., Petropavlovskyi, O., Kovalchuk, O., Lapovska, S., & Pasko, A. (2018). Design of the composition of alkali activated portland cement using mineral additives of technogenic origin. Eastern-European Journal of Enterprise Technologies, 4(6 (94), 6–15. https://doi.org/10.15587/1729-4061.2018.140324

Issue

Vol. 4 No. 6 (94) (2018): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2018 Pavel Krivenko, Oleg Petropavlovskyi, Oleksandr Kovalchuk, Svitlana Lapovska, Anton Pasko

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