CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE

Dmitriy Mishin; Alena Erygina

doi:10.62980/2076-0655-2026-382-394

VAK Russia 2.6.14 UDC 666.94.015.65 CSCSTI 61.35 Russian Classification of Professions by Education 18.06.01 Russian Library and Bibliographic Classification 383 Russian Trade and Bibliographic Classification 5415

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CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE

Published in Technique and technology of silicates · Volume 33, Issue 4, 2026 · Pages 382–394 · Rubric: MAIN RUBRIC

DOI: https://doi.org/10.62980/2076-0655-2026-382-394 · EDN: RVOBNK

Received: 27.08.2026 Accepted: 22.09.2026 Published: 01.11.2026 Language of publication: RUS

Authors

Dmitriy Mishin

Alena Erygina

Dmitriy Mishin

Academic degree: candidate of technical sciences

Belgorod State Technological University named after V.G. Shukhov (BSTU named after V.G. Shukhov) Head of the Department · Department of Cement and Composite Materials Technology · Russian Federation · Belgorod

Alena Erygina

Belgorod State Technological University named after V.G. Shukhov Senior lecturer · Department of Cement and Composite Materials Technology · Russian Federation · Belgorod

ABSTRACT

Introduction. This article presents a theoretical description of kinetics of sedimentation processes in ce-ment systems. Methods for reducing cement dehydration currently used at plants are described, which involve either increasing the specific surface area of the cement or partially replacing gypsum dihydrate (CaSO4·2H2O) with anhydrite (CaSO4). The analysis of scientific publications reveals the absence of a unified scientific model that would link the rate of ettringite crystal nucleation and growth with the sedimentation stability of cement slurries. Therefore, the primary objective of this research is to study the characteristics of C3A hydration with gypsum and gypsum-anhydrite stone. Materials and methods of research. To study hydration processes a clinker mineral, C3A, was preliminarily synthesized. Chemical reagents of chemically pure grade, CaCO3 and Al2O3, were used to synthesize the C3A clinker mineral. The study utilized gypsum and gypsum-anhydrite stone that complied with GOST 4013-2019. The microscopic analysis, determination of C3A dehydration with gypsum and gypsum-anhydrite stone with the addition of inert substance (fused periclase) were applied in the study. In develop-ing a method for producing cement with controlled water separation, standard clinker manufactured by JSC Yakutcement was used. Results. The results showed that during the hydration of C3A with gypsum-anhydrite stone, ettringite is predominantly formed in the intergranular space around large gypsum particles. However, during the hy-dration of C3A with gypsum, ettringite is formed on the surface of C3A. This suggests that dehydration of cement can be controlled by varying the number of crystallization centers, which can be represented by ground C3A or gypsum. Conclusions. During C3A hydration with gypsum-anhydrite stone, ettringite is predominantly formed in the intergranular space, near large gypsum particles. However, during C3A hydration with gypsum dihydrate, ettringite is formed on C3A surface. A decrease in cement dehydration occurs due to an increase in the number of individual and isolated ettringite crystallization centers due to fine grinding of either C3A or gypsum and their mechanical mixing. A method for regulating cement dehydration has been developed, aimed at increasing (through mechanical mixing) the number of ettringite crystallization centers by regulating the dispersion of gypsum in cement.

KEYWORDS

dehydration, sedimentation stability, gypsum, ettringite, ettringite crystallization centers, cement dehydration control, calcium aluminate hydrates

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GOST

Mishin D. A., Erygina A. O. CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE // Technique and technology of silicates. 2026. no. 4. pp. 382-394. DOI: https://doi.org/10.62980/2076-0655-2026-382-394. EDN: RVOBNK. (Date of access 07.11.2026).

MLA

Dmitriy Mishin, Erygina A. O.. "CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE." Technique and technology of silicates 33.4 (2026): 382-394. DOI: https://doi.org/10.62980/2076-0655-2026-382-394. EDN: RVOBNK.

APA

Mishin D. A., Erygina A. O. (2026). CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE. Technique and technology of silicates, 33(4), 382-394. https://doi.org/10.62980/2076-0655-2026-382-394 EDN: RVOBNK.

Chicago

Dmitriy Mishin, Erygina A. O.. "CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE." Technique and technology of silicates 33, no. 4 (2026): 382-394. https://doi.org/10.62980/2076-0655-2026-382-394. EDN: RVOBNK.

WIKI

{{cite journal | author = Mishin D. A., Erygina A. O. | title = CHARACTERISTICS OF C3A HYDRATION WITH GYPSUM AND GYPSUM-ANHYDRITE STONE | journal = Technique and technology of silicates | year = 2026 | volume = 33 | issue = 4 | pages = 382-394 | doi = 10.62980/2076-0655-2026-382-394 }} EDN: RVOBNK

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