ABSTRACT
Toughness evaluation of fibre-reinforced concrete is determined by three point bending test of prismatic specimens (15 × 15 × 55 cm) over 50 cm span.
The sum of energy spent before the first crack formation (fracture toughness corresponding to deflection δ) and different values of absorbed energy corresponding to specified deflection (3δ, 5,5δ and 10,5δ) are defined. Ratio of these two values defines fracture toughness indices (Figure 3).
