New issues - Известия Казанского государственного архитектурно-строительного университета.

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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Mukhametrakhimov Rustem Khanifovich candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Galautdinov Albert Radikovich candidate of technical sciences, senior lecturer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 Garafiev Ainur Maratovich team leader of the expertise and testing department E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LLC PII «Center for Expertise and Testing in Construction» The organization address: 420097, Russia, Kazan, Schmidtа st., 35
Title of the articleStructure and properties of fiber composites based on modified mineral binders
Abstract.Problem statement. Currently, the volume of production of modified fiber composites based on mineral binders tends to decrease, which is associated with a drop in demand for them due to the appearance on the market of alternative materials, including foreign ones. Traditionally obtained fibrous composite materials and products have several disadvantages, such as significant specific gravity, low physical and mechanical characteristics and durability, which significantly limit the range and scope of their application. This raises the significant interest in the development of modified fibrous composite materials based on mineral binders, the study of the processes of their structure formation, properties and improvement of production technology. Results. The paper studies the role of the reinforcing fiber type in the formation of the structure and properties of composites based on cement and gypsum binders. It is shown that the maximum strength of fiber-cement composites is provided at a degree of grinding of cellulose fibers of 30-40°ShR with their content in the matrix in an amount of 5-6 % of the mass of solid components, the best indicators are achieved with a specific surface of quartz sand of 310 m2/kg. Revealed that the optimal coefficient of fiber reinforcement of a gypsum-cement-pozzolanic matrix with cellulose fibers is 0,5-1 % of the binder mass at a degree of grinding of cellulose fibers of 30°ShR. Based on the analysis of the microstructure of the studied composites, established a positive effect of cellulose fibers on the structure and properties of finished products. Conclusions. The significance of the results for the construction industry lies in the possibility of obtaining fiber composites based on mineral binders with improved performance characteristics and durability, which will expand the scope of their application and increase their competitiveness in comparison with analogs.
Keywords.building materials, composite materials, dispersed reinforcement, mineral binders, cement, gypsum, structure.
For citations:Mukhametrakhimov R. Kh., Galautdinov A. R., Garafiev А. М. Structure and properties of fiber composites based on modified mineral binders // Izvestiya KGASU. 2020. № 4 (54) P. 62-71.


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