About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Hamza A. Qais, Researcher, Sana’a University, Sana’a, Republic of Yemen Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0009-0000-2805-7760 Nina N. Morozova, candidate of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-7867-4203 Oleg V. Khokhryakov, doctor of technical sciences, professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0001-5337-2850 Rashit K. Nizamov, doctor of technical sciences, professor, Kazan State University of Architecture and Engineering, Academician of the Academy of Sciences of the Republic of Tatarstan, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-3448-7369 |
| Title of the article | Strength and strain-stress properties of fine-grained concrete based on gypsum-cement-pozzolan binder |
| Abstract. | Problem statement. The most important indicators of fine-grained concrete based on gypsum-cement-pozzolan binder, which expand the possibilities of its use in load-bearing structures of buildings, are strength and deformation properties. This is especially true for structures that are operated in the hot tropical climate of the Republic of Yemen and will be in a complex stress-strain state. On the other hand, the low ability of gypsum-cement-pozzolan concrete to withstand the effects of moisture penetrating into the “body” of concrete along with aggressive substances from the environment will obviously lead to the loss of its original properties. The purpose of the work is to determine the strength and deformation properties of gypsum–cement-pozzolan concrete and establish their relationship, taking into account its low water resistance. To achieve this goal, it is necessary to solve the following tasks: to develop compositions of fine-grained gypsum-cement-pozzolan concrete; to study their mechanical properties and establish concrete strength classes; to determine the modulus of elasticity of fine-grained gypsum-cement-pozzolan concrete depending on the compressive strength classes B20-B45; to establish relationships between properties such as compressive strength (cubic and cylindrical), flexural tension, axial tension, initial modulus of elasticity and initial coefficient of transverse deformation (Poisson ratio). Results. The paper presents the results of a study of six different compositions of gypsum-cement-pozzolan concrete, differing in compressive strength class (B20-B45). It was found that cubic compressive strength varies from 25 to 60 MPa, flexural tensile strength from 3.0 to 6.2 MPa, axial tensile strength from 1.9 to 3.4 MPa, cylindrical axial compressive strength from 21.7 to 52.5 MPa, elastic modulus from 18.9 to 28.2 GPa and coefficient of Poisson ratio was from 0.16 to 0.24. At the same time, the softening coefficient, which determines the water resistance of gypsum-cement–pozzolan concrete, turned out to be very high - from 0.75 to 1.17. Conclusions. The significance of the results obtained for the construction industry lies in the fact that fine-grained gypsum-cement-pozzolan concretes are slightly inferior to similar classes of Portland cement-based concretes, which allows them to be recommended for the production of products and structures used in load-bearing building frames. |
| Keywords. | gypsum cement-pozzolan binder, compressive strength, flexural tensile strength, axial tensile strength, cylindrical strength, modulus of elasticity, Poisson ratio, softening coefficient |
| For citations: | Qais H.A., Morozova N.N., Khokhryakov O.V., Nizamov R.K. Strength and strain-stress properties of fine-grained concrete based on gypsum-cement-pozzolan binder // News of KSUAE, 2025, № 1(71), p. 51-66, DOI: 10.48612/NewsKSUAE/71.5, EDN: EANJZS |
