Analysis of Changes in the Characteristics of Activated Cement Using Disintegrator Technology

The aim of the study is to research possible changes in the characteristics of cement during its activation using a disintegrator installation. Cement activation was carried out on a DSL-94 disintegrator with activation energy of 17 kJ/kg. The studies consisted of single, double and triple activation of cement in a disintegrator installation, followed by determination of changes in the physical characteristics of cement particles. An increase in the specific surface area of cement for each subsequent activation of cement by 12–16% was revealed, and an increase in the number of particle contacts by about 2 times for each subsequent passage of cement through the disintegrator unit was also noted. An increase in voidness by 12.4% was found after the first passage of cement through the disintegrator unit. A change in the bulk density of cement particles after activation was revealed, as well as a change in the agglomeration of cement particles was determined. A decrease in particle fractions of 40–63 microns was determined in comparison with the control cement: by 5.4%, 8.7%, 8.4% at activation energies of 17 kJ/kg, 34 kJ/kg and 51 kJ/kg, respectively. The determination of the change in the size of cement particles after single, double and triple activation with the construction of integral and differential curves of particle distribution, the construction of the Rosin-Rammler distribution of cement particles with different activation energies. The change in the magnitude of the exothermic reaction, as well as the change in the time of release of exothermic energy during the mixing of activated cement with water, was determined

S.V. SAMCHENKO¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
M.A. ABRAMOV², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.B. OSMANOV^1,2, postgraduate (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Moscow State University of Civil Engineering, National Research University (26, Yaroslavskoe highway, Moscow, 129337, Russian Federation)
² Yaroslavl State Technical University (88, Moscow Avenue, Yaroslavl, 150023, Russian Federation)

1. Fedyuk R.S., Mochalov A.V., Lesovik V.S. Modern methods of activation of binder and concrete mixtures (review). Vestnik of the FEFU Engineering School. 2018. No. 4 (37), pp. 85–99. (In Russian).
2. Samchenko S., Kozlova I., Zemskova О., Baskakova E. Increase of aggregative and sedimentation stability of slag suspensions by ultrasound. E3S Web of Conferences. 2019. Vol. 110. 01061. DOI: 10.1051/e3sconf/201911001061
3. Samchenko S., Kozlova I., Zemskova O., Zamelin D., Pepelyaeva A. Complex method of stabilizing slag suspension. Advances in Intelligent Systems and Computing. 2019. Vol. 983, pp. 817–827. DOI: 10.1007/978-3-030-19868-8_80
4. Samchenko S.V., Egorov E.S. Influence of ultradispersed additive from pre-hydrated cement on the properties of cement paste. Tekhnika i tekhnologiya silikatov. Mezhdunarodnyy zhurnal po vyazhushchim. 2019. Vol. 26. No. 2, pp. 52–57. (In Russian).
5. Rybakova M.V., Barbanyagre V.D. Intensification of the hardening process of cement stone based on mechanically activated suspension. II International seminar-competition of young scientists and graduate students working in the field of binders, concretes and dry mixes: a collection of reports. St. Petersburg. 2011. p. 140. (In Russian).
6. Krivoborodov Yu.R., Yasko D.A. Activation of cement to improve the properties of concrete. New science: problems and prospects. Collection of articles of the International scientific-practical conference. Sterlitamak: RICA MI. 2015. No. 3, pp. 105–108. (In Russian).
7. Elenova A.A., Krivoborodov Yu.R. Influence of a gyrodynamically activated crystalline hydrate additive on the hydration and hardening of cement stone. Advances in chemistry and chemical technology: a collection of scientific papers. 2016. Vol. XXX. No. 7, pp. 36–38. (In Russian).
8. Gurinovich L.S., Usov B.A. Mechanochemical treatment of building materials. Ecology and construction. Scientific Research Center Of Environmental Engineering And Construction. 2015. V. 3. No. 3, p. 22. (In Russian).
9. Stavrov S.V., Abramov M.A. Mechanochemical production of microfillers for “smart” and multifunctional concretes. Young scientists – Development of the National Technology Initiative (POISK). 2020, pp. 635–638. (In Russian).
10. Murog V.Yu., Vaitekhovich P.E., Borovsky D.N. Grinding-classifying mills of the disintegrator type. Proceedings of the Belarusian State Technological University. Series 3. Chemistry and technology of inorganic substances. 2008, pp. 113–117. (In Russian).
11. Zlobin I.A., Mаndrikova O.S., Borisov I.N. The method of mechanical action during grinding as a factor determining the formation of qualitative characteristics of cement. Tsement i yego primeneniye. 2016. No. 1, pp. 158–162. (In Russian).
12. Gurinovich L.S., Usov B.A. Mechanochemical treatment of building materials. Ecology and construction. Scientific Research Center Of Environmental Engineering And Construction. 2015. Vol. 3. No. 3, p. 22. (In Russian).
13. Promtov M.A. Pul’satsionnyye apparaty rotornogo tipa: teoriya i praktika [Pulsation devices of rotary type: theory and practice]. Moscow: Mashinostroenie-1 Publishing House. 2001. 260 p.
14. Mehrotra S.P., Alex T.C., Greifzu G., Kumar R. Mechanical activation of gibbsite and boehmite. New findings and their implications. Transactions of the Indian Institute of Metals. 2015. 69 (1). С. 51–59. DOI: 10.1007/s12666-015- 0633-6