ABSTRACT
The limited strain capacity of cementitious materials makes the tension weak, brittle, and considerably notch sensitive. Research on composites reinforced with steel and polymeric žbers like PP show that at the low-dosage levels, žbers do not increase the tensile or ²exural strength [1]. Composite toughness, however, is directly related to the žber pullout mechanism so that superior improvements in stiffness, strength, and ductility are reported as the amount of žbers increases and the specižc žber spacing decreases.
