Advances in concrete construction

  • 제4권1호
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  • Pages.1-14
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  • 2016
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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Spalling of heated high performance concrete due to thermal and hygric gradients

  • Zhang, Binsheng (School of Engineering and Built Environment, Glasgow Caledonian University) ;
  • Cullen, Martin (School of Engineering and Built Environment, Glasgow Caledonian University) ;
  • Kilpatrick, Tony (School of Engineering and Built Environment, Glasgow Caledonian University)
  • 투고 : 2015.07.09
  • 심사 : 2016.03.24
  • 발행 : 2016.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, high performance concrete beams and prisms with high content of PFA were heated to various temperatures up to $450^{\circ}C$ at heating rates of $1^{\circ}C/min$, $3^{\circ}C/min$ and $10^{\circ}C/min$. The thermal gradient was found to increase first with the heating time until a peak value was reached and then decrease until the thermal equilibrium was reached, measured as $115^{\circ}C$, $240^{\circ}C$ and $268^{\circ}C$ for the three heating rates. Spalling occurred on some specimens when the heating temperature was over $400^{\circ}C$ for heating rates of $3^{\circ}C/min$ and $10^{\circ}C/min$. The hygric gradient was found to reach its maximum when the thermal gradient reached its peak. This study indicates that spalling of HPC could happen when the heating temperature was high enough, and both thermal and hygric gradients reached their maxima.

키워드

참고문헌

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피인용 문헌

  1. Temperature Effect on the Mechanical Properties of Very High Performance Concrete vol.34, 2018, https://doi.org/10.4028/www.scientific.net/JERA.34.29
  2. Fracture toughness of high performance concrete subjected to elevated temperatures Part 2 The effects of heating rate, exposure time and cooling rate vol.5, pp.5, 2017, https://doi.org/10.12989/acc.2017.5.5.513
  3. Temperature and humidity effects on behavior of grouts vol.5, pp.6, 2016, https://doi.org/10.12989/acc.2017.5.6.659
  4. Residual strength capacity of fire-exposed circular concrete-filled steel tube stub columns vol.6, pp.5, 2016, https://doi.org/10.12989/acc.2018.6.5.485
  5. Influence of mineral by-products on compressive strength and microstructure of concrete at high temperature vol.7, pp.4, 2016, https://doi.org/10.12989/acc.2019.7.4.263
  6. Thermal Path Reconstruction for Reinforced Concrete Under Fire vol.55, pp.5, 2016, https://doi.org/10.1007/s10694-019-00835-7
  7. Behavior of UHPC-RW-RC wall panel under various temperature and humidity conditions vol.9, pp.5, 2016, https://doi.org/10.12989/acc.2020.9.5.459