Title: Two-Stage Cementitious Composites Containing Recycled Steel Fibers

Author(s): Alessandro P. Fantilli and Farmehr M. Dehkordi

Publication: Materials Journal

Volume: 119

Issue: 2

Appears on pages(s): 197-206

Keywords: eco-mechanical analysis; post-cracking behavior; recycled materials; three-point bending test; uniaxial compression test

DOI: 10.14359/51734300

Date: 3/1/2022

Abstract:
Experimental research performed on fiber-reinforced cement-based composites made with polymeric aggregate and reinforced with recycled steel fibers is presented in this paper. In total, 18 concrete prisms were cast with a two-stage procedure: first, the fibers from end-of-life tires were put in the molds and, subsequently, they were covered by a cementitious grout containing fine (recycled or virgin) aggregate. The two-stage composites showed more than one crack and a deflection-hardening behavior in the post-cracking regime by performing three-point bending tests. Moreover, both flexural and compressive strength increased with the fiber volume fraction. Thus, if the content of recycled materials is suitably selected, the ecological and mechanical performances of the two-stage composites improve and become similar to those of one-stage fiber-reinforced concrete made with only virgin components.