This study investigated the mechanical properties of ultra high performance fiber reinforced cementitious composites (UHPFRCC) with four different fiber volume fractions (Vf= 1%, 2%, 3%, and 4%) within an identical mortar matrix. The higher amount of fiber resulted in an improvement of load carrying capacity and elastic modulus in compression up to 3. vol.% of fibers. A higher pullout strength was obtained from the inclusion of fibers in the matrix, and 2. vol.% of fibers provided the best performance in all aspects of fiber pullout behavior including average and equivalent bond strengths and pullout energy. The flexural strength was pseudo-linearly increased with increase in fiber volume fraction, despite an insignificant difference in the first cracking load. Furthermore, a bi-linear softening curve for UHPFRCC was suggested based on the result of inverse analysis, and it was verified through comparison with the experimental data.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A1A05026406 ) and carried out as a partial research of the “Development of Ultra High Performance Concrete for Hybrid Cable Stayed Bridges” in the Korea Institute of Construction Technology.
- Fiber content
- Inverse analysis
- Micro steel fiber
- Tension-softening curve
- Ultra high performance fiber reinforced cementitious composites
ASJC Scopus subject areas
- Ceramics and Composites
- Civil and Structural Engineering