Study of the Thermophysical Characteristics of Steel Fiber Reinforced Concrete

Abstract:

The number of researches on steel fiber reinforced concrete (SFRC) fire resistance is insignificant. For the calculation of building structures for fire resistance, it is necessary to use the thermophysical characteristics of concrete: thermal conductivity, heat capacity and thermal diffusivity. The physicomechanical characteristics of SFRC depend on the volumetric content of the fiber in it. This paper presents the results of studies of thermophysical properties of SFRC. The studied SFRC had a high-strength self-compacting cement-sand matrix and a different percentage of fiber content (from 0 to 6%). The experiments were carried out for SFRC with steel wavy fiber 15 mm long and 0.3 mm in diameter. As a result of experimental studies, it was discovered that with an increase in the volumetric content of the fiber, a decrease in the values of heat flow, thermal conductivity and thermal diffusivity coefficients, specific heat capacity is observed and the thermal resistance of SFRC increases.

• Periodical: Materials Science Forum (Volume 992)
• Pages: 41-47
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.992.41
• Online since: May 2020
• Authors: I.L. Shubin*, V.A. Dorf, R.O. Krasnovskij, D.E. Kapustin, P.S. Sultygova
• Keywords: Heat Capacity, Steel Fiber, Steel Fiber Reinforced Concrete, Thermal Conductivity, Volumetric Fiber Content

References

[1] Yu.V. Puharenko, Effective fiber reinforced materials and products for construction, Industrial and Civil Engineering, 10 (2007).

[2] E.A. Koleda, S.N. Leonovich, A.V. Letysh, Analysis of the physical and mechanical characteristics of steel-fiber-concrete, Grodno: GrSU them. Y. Kupala, (2016) 248-253.

[3] R.A. Nazirov, Modeling the thermal conductivity of lightweight concrete on a coarse aggregate, Izvestiya KGASU, 2 (2013) 238-246.

[4] V. Dorf, R. Krasnovskiy, D. Kapustin, P. Sultygova, N. Umnyakova, Influence of Fiber Content on the Conductivity of Steel Fiber-reinforced Concrete, American Concrete Institute, ACI Special Publication (2018-June (SP-326-62) 62.1-62.8.

DOI: 10.14359/51711045

[5] R.A. Nazirov, A.N. Volkov, Theoretical calculation of the thermophysical properties of cement concretes using heat-rich aggregate, Vestnik TGASU. 2 (2014) 150-155.

[6] Balázs Nagy, Salem Georges Nehme, Dóra Szagri. Thermal properties and modeling of fiber reinforced concretes, Energy Procedia. 78 (2015) 2742-2747.

DOI: 10.1016/j.egypro.2015.11.616

[7] V.A. Dorf, R.O. Krasnovskij, D.E. Kapustin, I.A. Gorbunov, R.R. Nuriev, The speed of propagation of ultrasound in steel fiber concrete with cement-sand matrix, Concrete and reinforced concrete. 3 (2014) 5-8.