Title:
Influence of Fiber Content on the Conductivity of Steel Fiber-Reinforced Concrete
Author(s):
Valeriy Dorf, Rostislav Krasnovskiy, Dmitriy Kapustin, Patimat Sultygova, and Nina Umnyakova
Publication:
Symposium Paper
Volume:
326
Issue:
Appears on pages(s):
62.1-62.8
Keywords:
Steel fiber reinforced concrete, steel fiber, matrix, stay-in-place forms, heat conductivity, density, entrained air, porosity, high temperature, fire
DOI:
10.14359/51711045
Date:
8/10/2018
Abstract:
The results of an experimental campaign on the thermal conductivity of a mortar (cement + sand) containing various amounts of steel fibers are presented in this study. Increasing the amount of steel fibers (from 0 to 6% by volume) is shown to reduce the thermal conductivity of SFRC, by the extra porosity induced by the fibers and contact thermal resistance. To show the possible benefits coming from the use of SFRC, the case of SFRC formworks is presented, as these formworks may be used in the fire protection of R/C members, as expendable permanent formworks. To this purpose, the finite-element analysis of an R/C member protected by a SFRC formwork is presented, to assess the effectiveness of this kind of fire protection
Related References:
1. Dorf V.A., Krasnovsky R.O., Kapustin D.E., Rogachev K.V Perspectives of development of one of directions of industrialized construction in construction of residential and social buildings. Architecture and construction in Russia. 2012, Ne 12, pp. 11-15
2. Dorf V.A., Krasnovsky R.O., Kapustin D.E., Gorbunov I.A. Influence of fiber parameters on the cubic and prismatic strength of steel-fiber concrete with a cement-sand matrix // Concrete and reinforced concrete, 2013, No. 6. pp. 6-9
3. Kapustin D.E. Permanent SFRC forms as a load bearing element of NPP building and structure reinforced concrete structures. Ph D Thesis in Engineering Science. M. 2016, 282 p.
4. Soloviev V.G., Burianov A.F., Elsufieva M.S. Ways to increase the performance of prefabricated SFRC products. Concrete technology. 2016, No. 1-2, pp.34-36
5. SNiP 3.04.03 Protection of buildings and structures against corrosion
6. GOST 7076-99 Building materials and products. Method for determining steady-state thermal conductivity and thermal resistance
7. ISO 8301: 1991 Thermal insulation - Determination of steady-state thermal resistance meter
8. Franchuk A.U. Tables of heat engineering indicators of building materials, M.: Research Institute of Building Physics, 1969 - 142.
9. Dorf V.A., Krasnovsky R.O., Kapustin D.E., Gorbunov I.A., Nuriyev R.R. Rate of ultrasound propagation in SFRC with cement-sand matrix. Concrete and reinforced concrete. 2014, Ne 3, pp. 5-8.
10. Ivan MARKOVIC High-Performance Hybrid-Fibre Concrete. - Development and Utilisation 2006. Thesis
11. MAC 21-2.2000 Fire Resistance and Fire Safety of Reinforced Concrete Constructions
12. Heat transfer of heterogeneous systems. http://3ys.ru/materialovedenie/teploprovodnost-geterogennykh-sistem.html