Residual Tensile Properties and Explosive Spalling of High-Performance Fiber-Reinforced Cementitious Composites Exposed to Thermal Damage
| Autor: | Sung-Wook Kim, Namkon Lee, Gi-Joon Park, Jung-Jun Park, Gang-Kyu Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Explosive material 0211 other engineering and technologies explosive spalling 02 engineering and technology lcsh:Technology Article synthetic fibers chemistry.chemical_compound 021105 building & construction Ultimate tensile strength General Materials Science Composite material lcsh:Microscopy lcsh:QC120-168.85 Polypropylene lcsh:QH201-278.5 lcsh:T direct tensile strength 021001 nanoscience & nanotechnology Spall residual strength high-performance fiber-reinforced cementitious composites Residual strength Synthetic fiber chemistry lcsh:TA1-2040 Volume fraction lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 High-performance fiber-reinforced cementitious composites |
| Zdroj: | Materials, Vol 14, Iss 1608, p 1608 (2021) Materials Volume 14 Issue 7 |
| ISSN: | 1996-1944 |
| Popis: | This study examined the effect of adding synthetic fibers, that is, polypropylene (PP) and nylon (Ny), on explosive spalling and residual tensile mechanical properties of high-performance fiber-reinforced cementitious composites (HPFRCCs). Three different matrix strengths (100 MPa, 140 MPa, and 180 MPa), four different volume contents of the synthetic fibers (0%, 0.2%, 0.4%, and 0.6%), and three different exposure time (1 h, 2 h, and 3 h) based on the Internatinoal Organization for Standardization (ISO) fire curve were adopted as variables for this experiment. The experimental results revealed that the addition of synthetic fibers improved the resistance to explosive spalling induced by high-temperature, especially when PP and Ny were mixed together. For a higher matrix strength, greater volume content of the synthetic fibers was required to prevent explosive spalling, and higher residual strengths were obtained after the fire tests. An increase in the volume fraction of the synthetic fibers clearly prevented explosive spalling but did not affect the residual tensile strength. In the case of a higher matrix strength, a reduction in the strength ratio was observed with increased exposure time. |
| Databáze: | OpenAIRE |
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