English
Русский 30-37 p.
The paper is devoted to a full-scale study of corundum modifying dispersed additives (reactive, tabular, dispersing alumina) and artificial ceramic binder, their impact on high-alumina cement microstructure and setting time. Artificial ceramic binders are characterized by similar chemical, phase and grain composition with modifying corundum additives and characterized by the presence of particles less than 100 nm (up to 0.5%). The studied materials are finely dispersed polyfractional systems from 0.1 to 13 μm with a prevailing grading fraction of 2-10 μm. In this case, dispersing and reactive alumina are more coarse. Using the microscopy method it was established that the corundum additives increase packing density of high-alumina cement samples, especially with artificial ceramic binder addition. Studies of dispersed additives effect on the setting time of cement was conducted. It is established that the adding of artificial ceramic binder or dispersing alumina at 0.5% is speeding up the initial setting, but a further increasing of the additive content does not affect this indicator. The maximum reduction of setting time is caused by the introduction of 5% tabular alumina.
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2. Banerjce S. Monolithic Refractories. Singapoore – New Jersey – London – Hong-Kong, World Scientific Publishing Co. Pte Ltd., 1998.
3. JshikawaM., TaokaK. Energy and Resource Saving and Dusty Environment in Monolithic Refractories. Taikabutsu-Refractories. 2000. 52 (4). P. 234 – 239.
4. Doroganov V.A., Doroganov E.A., Peretokina N.A. and ets. Corundum and Zirconia Composites Based on Artificial Ceramic Binder. Refractories and Industrial Ceramics. 2016. 57 (1). P. 92 – 97.
5. Doroganov V.A., Doroganov E.A., Trepalina YU.N., Peretokina N.A., Evtushenko E.I., Gavshina O.V. Ogneupornye kompozicionnye materialy na osnove modificirovannyh iskusstvennyh keramicheskih vyazhushchih. Novye ogneupory. 2015. 3. P. 40. (rus.)
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7. Pivinskij YU.E, Onishchuk V.I., Doroganov V.A. i dr. Zavisimost' tekhnologicheskih parametrov vysokokoncentrirovannyh keramicheskih i stekol'nyh vyazhushchih suspenzij slozhnyh sostavov ot himicheskoj prirody tverdoj fazy. Vestnik BGTU im.V.G. SHuhova. 2016. 9. P. 175 – 182. (rus.)
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9. Doroganov V.A., Doroganov E.A., Peretokina N.A. i dr.Korundovye i cirkonievye kompozity na osnove iskusstvennyh keramicheskih vyazhushchih. Novye ogneupory. 2016. 2. P. 50 – 56. (rus.)
10. Pivinskij YU.E. Ogneupornye betony novogo pokoleniya. Nizkocementnye betony, nalivnye vibracionnye tiksotropnye ogneupornye massy. Ogneupory. 1992. 7. P. 12 – 21. (rus.)
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12. Mandecka-Kamień L., Rapacz-Kmita A., Wójcik Ł. The effect of the addition of polypropylene fibres on the properties of corundum refractory concretes with a low cement content and an addition of aluminium phosphate. Ceramics International. 40 (10), Part A, December 2014. P. 15663 – 15668.
13. Zajcev S.V., Doroganov V.A., Doroganov E.A., Varenikova T.A. Issledovanie tonkodispersnyh modificiruyushchih dobavok dlya ogneupornyh betonov. Novye ogneupory. 2017. 3. P. 41 – 42. (rus.)
14. Pivinskij YU.E. Novye ogneupornye betony. Belgorod: Izd-vo BelGTASM, 1996. 148 p. (rus.)
15. Doroganov V.A., Doroganova E.V., Gokova E.N., Onishchuk V.I. The study of structural and mechanical properties of the disperse systems for additive technologies. International Journal of Pharmacy & Technology/IJPT| Dec-2016. 8 (4). P. 22496 – 22505.
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Gavshina O.V., Yashkina S.Yu., Yashkin A.N., Doroganov V.A., Moreva I.Yu. Study of the effect of particulate additives on the setting time and microstructure of high-alumina cement. Construction Materials and Products. 2018. 1 (4). P. 30 – 37. https://doi.org/10.34031/2618-7183-2018-1-4-30-37