Various recycled-waste fibers used in cementitious composites. (a) Waste plastic fiber [], (b) Waste recycled polyethylene terephthalate fiber [], (c) Waste recycled PET/PE fibers from packaging [], (d) Waste recycled PE/PP fibers from artificial turf [], (e) Virgin PP draw-wired fibers [], (f) Textile waste fiber [], (g) Kraft pulp Fiber [], (h) Waste polypropylene carpet fibers [], (i) Waste carpet face fibers [], (j) Waste carpet fibers [], (k) Waste steel scrap [], (l) Tire-recycled steel fibers [], (m) Waste recycled plastic fiber [], (n) Waste recycled woven plastic sack fiber [], (o) Waste fishing-net fiber [], (p) Waste recycled steel fiber [].