Concrete with waste steel fibers and crumb rubber (WSFCR) was
primarily created using components that are extracted from the scrap tires
recycling process. Crumb rubber particles of size (1- 4) mm and relative density
1.0 gm/cm3 were included as a partial replacement (10% by volume) of natural
sand. Recycled or waste steel fibers were used in four percentages from the total
mass of the concrete (0.5%, 1.0%, 1.5%, and 2.0%). The efficiency of WSFCR
has primarily been studied to evaluate its performance against impact loads,
compared to the performance of traditional concrete (CR 0), rubber concrete
(CR 10%), and rubber concrete reinforced with industrial steel fibers (ISFCR).
Also, the influence of recycled steel fibers on the different strengths of the
rubberized concrete was presented. A total number of eleven slabs
(1000×1000×100 mm) were subjected to 10.738 Kg cylindrical steel weight falling
from a 1.5 m distance concerning the number of blows at the first crack
formation and complete failure. Both WSFCR and ISFCR showed outstanding
performance under impact loads compared to CR0 and CR 10% control
mixtures. Although ISFCR resulted in a higher impact energy resistance than
WSFCR, which showed convergent results and a similar crack pattern;
therefore, it is a strong candidate as a low-cost alternative to industrial steel
fibers