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Effects of thermal damage on physical properties and cracking behavior of ultrahigh-performance fiber-reinforced concrete
| Content Provider | Hyper Articles en Ligne (HAL) |
|---|---|
| Author | Bian, Hui Hannawi, Kinda Takarli, Mokhfi Molez, Laurent Prince, William |
| Copyright Year | 2016 |
| Abstract | In this work, we study the impact of thermal damage on the physical and mechanical properties of ultrahigh-performance fiber-reinforced concrete (UHPFRC), especially on their cracking process under compressive loading. Four mixtures of UHPFRC were prepared using identical composition but reinforced with different types of fibers: mineral fibers (Steel or Wollastonite) or organic fibers (PP or PVA) and compared with that without fibers (UHPC). To induce a thermal damage on UHPFRC, the samples were subjected to temperatures ranging from 150 to 400 °C. After each degradation stage, the gas permeability and the P-wave velocity were measured. The mechanical behavior under loading has been studied using a uniaxial compression test which combines the gas permeability and the acoustic emission measurement. The results show that the melting of organic fibers at approximately 180 °C builds a tunnel across the cement paste and increases brutally the gas permeability. At 400 °C treatment, a decrease of compression strength by 30 % and of Young modulus by approximately 60 % was observed. However, we can see that the thermal damage results a decrease in the threshold of initial cracking (rk-ci) and that of unstable cracking (rk-pi), and this can be explained by the initiation of new cracks and their coalescence. |
| Related Links | https://hal.science/hal-01365982/file/Bian2016%20version%20LM.pdf |
| ISSN | 00222461 |
| e-ISSN | 15734803 |
| DOI | 10.1007/s10853-016-0233-9 |
| Journal | Journal of Materials Science |
| Issue Number | 22 |
| Volume Number | 51 |
| Language | English |
| Publisher | HAL CCSD Springer Verlag |
| Publisher Date | 2016-11-01 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ceramics and Composites Physics and Astronomy Mechanics of Materials Materials Science Mechanical Engineering Polymers and Plastics |
