The energy of destruction uhpc 2% reinforced fibre could reach 70,000 J/m2 while the two types of common steel BTCS with background concrete 30 MPa and 80 MPa only energy destroyed approximately 9,000-12,000 and 14,000-21,000 J/m2, not concrete reinforcement fibers have only destroyed under 2,000 energy J/m2. Bending resistant toughness worth about 60-180 J corresponds to use fiber content from 1-3.5%
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