Impact of Passive Restraint on Concrete Fire Spalling
Author Information
Author(s): Katarzyna Mróz, Izabela Hager, Marcin Tekieli, Václav Kočí, João Castro-Gomes
Primary Institution: Cracow University of Technology
Hypothesis
Does passive restraint affect the severity of fire-induced spalling in concrete?
Conclusion
The study confirms that thermal dilation restraint intensifies the severity of spalling in concrete.
Supporting Evidence
- Increasing the cold rim width leads to higher compressive stress and strain in the concrete.
- Unrestrained slabs showed minimal spalling, while restrained slabs exhibited significant spalling.
- The study provides a quantitative framework linking stress evolution, strain distribution, and spalling depth.
- Thermal dilation restraint is crucial for assessing fire-induced concrete spalling.
Takeaway
When concrete is heated in a fire, parts that are not heated can help hold it together, but if they don't, the concrete can break apart more easily.
Methodology
The study involved preparing concrete specimens with varying cold rim widths and testing them in a controlled fire environment to observe spalling behavior.
Limitations
The study does not provide an extensive comparison of the cold rim effect and its influence on fire test results.
Digital Object Identifier (DOI)
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