Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 91, Number 2, July25 2024 , pages 177-195 DOI: https://doi.org/10.12989/sem.2024.91.2.177 |
|
|
|
Spalling resistance and mechanical performance of UHPC under high temperature using hybrid natural and artificial fibers |
||
Arash K. Pour, Amir Shirkhani and Ehsan Noroozinejad Farsangi
|
||
| Abstract | ||
| This research plans to investigate the simultaneous impact of bamboo fibers (BF) and steel fibers (SF) on the mechanical and spalling characteristics of ultra-high-performance concrete (UHPC) exposed to high temperatures (HT). To this aim, 25 mixtures were made and assessed. BF was added at five contents of 0, 2.5, 5, 7.5 and 10 kg/m3. Additionally, SF was used at five weight contents: 0%, 1%, 2%, 3% and 4%. Specimens were exposed to temperatures ranging between 25oC and 800oC. Thus, com-pressive, tensile, and flexural strengths, elastic moduli, mass loss, and permeability were measured. Experiments revealed that the simultaneous use of low BF and SF contents could totally prevent spalling of UHPC, but the use of either SF or BF alone could not prevent spalling at high levels of fibers. Besides, the synergetic positive impact of BF and SF on the spalling resistance of UHPC was by reason of the rise of BF' permeability and the bridging role of SF at HT. Moreover, it was concluded that the use of SF could moderate the adverse influence of BF on the compressive resistance of UHPC. | ||
| Key Words | ||
| bamboo fibers; high temperature; spalling resistance; steel fibers; ultra-high-performance concrete | ||
| Address | ||
| Arash K. Pour: Innovative Structural Engineering and Mechanics Group, USA Amir Shirkhani: Department of Structural Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran Ehsan Noroozinejad Farsangi: Urban Transformations Research Centre (UTRC), Western Sydney University, NSW, Australia | ||