Changes in the Prismatic Strength and Elastic Modulus of High-Strength Steel Fiber Concrete and its Matrix Depending on the Age

Number of journal: 6-2020
Autors:

Moiseenko G.A.

DOI: https://doi.org/10.31659/0585-430X-2020-781-6-13-17
УДК: 666.98

 

AbstractAbout AuthorsReferences
When constructing unique, including high-rise, structures under the conditions of increasing massiveness of monolithic structures, the use of high-strength concrete becomes especially relevant. Fine-grained high-strength concretes that have a micro-porous structure with a minimum number of defects have a number of positive qualities and open up wide prospects for monolithic construction. The main disadvantage of such concretes is their increased fragility. One of the ways to reduce the negative impact of this factor is the introduction of dispersed reinforcing with steel fiber. In this regard, high-strength steel fiber concrete has recently attracted increasing scientific and practical interest. However, its wide application is limited by the lack of a full regulatory framework and insufficient knowledge of the properties of this material. This paper presents a theoretical treatment of the results of experimental studies of the main physical and mechanical properties of high-strength steel-fiber concrete: prismatic strength and elastic modulus under short-term compression. Concrete prepared from domestic components with steel fiber content at the lower efficiency threshold of 1.5 wt. % is studied. For comparison, similar characteristics of the matrix – fine-grained high-strength concrete without the addition of fiber – are studied in parallel. As a result of theoretical processing of experimental data, the dependencies describing the change in these characteristics depending on the age were corrected.
G.A. MOISEENKO, Leading Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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For citation: Moiseenko G.A. Changes in the prismatic strength and elastic modulus of high-strength steel fiber concrete and its matrix depending on the age. Stroitel’nye Materialy [Construction Materials]. 2020. No. 6, pp. 13–17. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2020-781-6-13-17


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