The effect of elevated temperatures on the properties of cold-drawn steel fibres

Author(s)

Serafini, Ramoel ^[1] ; Mendes, Livia Mourao ^[1] ; Salvador, Renan Picolo ^[2] ; de Figueiredo, Antonio Domingues ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Construct & Urban Engn, Sao Paulo - Brazil

^[2] Univ Sao Judas Tadeu, Dept Civil Engn, Sao Paulo - Brazil

• Document type: Journal article
• Source: MAGAZINE OF CONCRETE RESEARCH; v. 73, n. 18, p. 936-944, SEP 2021.
• Web of Science Citations: 2

Abstract

This study aims to evaluate the effect of elevated temperatures on the physical, mechanical and microstructural properties of a hooked-end steel fibre for temperatures of 100, 350, 750 and 1000 degrees C. Results show that an oxidation layer is formed on the surface of the fibres exposed to temperatures of 750 degrees C and above, which leads to an increase in external diameter and mass. Reductions in tensile strength are directly proportional to the temperature increase, while rupture strain values significantly increase for temperatures above the recrystallisation temperature of steel. This study contributes to the understanding of the contribution of steel fibres to the overall behaviour of the composite after temperature exposure and serves as an input for recently developed numerical models. (AU)

• FAPESP's process: 17/00125-9 - Characterization of chemical properties, mechanical performance and durability of sprayed concrete
• Grantee: Renan Pícolo Salvador
• Support Opportunities: Scholarships in Brazil - Post-Doctoral