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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


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

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