The effect of secondary fibre reinforcement on dynamic resistance of ultra-high-performance concrete
DOI:
https://doi.org/10.14311/AP.2026.66.0139Keywords:
fibre-reinforced concrete, dynamic fracture, Charpy test, fracture toughnessAbstract
This study compares the dynamic initiation fracture toughness of five fibre-reinforced concrete materials with different types of fibre reinforcement. The base material was steel fibre-reinforced ultra-high-performance concrete (S). Four additional materials were created by incorporating various secondary fibre reinforcements into the base mix: aramid (SA), polyvinyl alcohol (SPVA), carbon (SG), and polypropylene (SP). Dynamic fracture initiation toughness was determined by conducting mediumspeed tensile tests on double-edge notched specimens. These tests were performed with a modified Instron Ceast 50 J instrumented Charpy tester, using a striking velocity of 3.8 ms−1 and a total impac energy capacity of 7.5 J. The polypropylene fibre-reinforced concrete (SP) exhibited the highest average dynamic initiation fracture toughness (171.4 kPam0.5) and also demonstrated the greatest impact toughness.
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Copyright (c) 2026 Ľubomír Gajdoš, Martin Šperl, Martina Drdlová, Radek Řídký
This work is licensed under a Creative Commons Attribution 4.0 International License.
