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.