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Recovery Behavior of the Macro-Cracks in Elevated Temperature-Damaged Concrete after Post-Fire Curing
Lang Li1, Yao Chen1,2, Chao He1,2
1Failure Mechanics & Engineering Disaster Prevention, Key Laboratory of Sichuan Province, College of Architecture & Environment, Sichuan University, Chengdu 610065, China.
Materials (Basel, Switzerland)
|August 26, 2022
Summary
Post-fire curing effectively heals cracks in fire-damaged concrete, particularly interfacial cracks. This crack recovery is key to restoring the concrete
Area of Science:
- Materials Science
- Civil Engineering
- Structural Engineering
Background:
- Fire damage significantly compromises concrete structures, necessitating effective recovery methods.
- Thermal-induced cracks in concrete reduce structural integrity and strength.
- Post-fire curing offers a potential solution for repairing fire-damaged concrete.
Purpose of the Study:
- To investigate the crack recovery behavior of fire-damaged concrete after post-fire curing.
- To determine the relationship between crack recovery and compressive strength recovery.
- To provide practical guidance for repairing fire-damaged concrete structures.
Main Methods:
- Concrete samples were exposed to high temperatures (400, 600, and 800 °C).
- Treated samples underwent a post-fire curing process.
- Compressive strength and crack recovery (length, type) were analyzed.
Main Results:
- Interfacial cracks were the predominant crack type in fire-damaged concrete.
- Post-fire curing significantly recovered interfacial cracks.
- Compressive strength recovery was primarily attributed to the healing of interfacial cracks.
Conclusions:
- Post-fire curing is effective in recovering fire-induced interfacial cracks in concrete.
- The recovery of interfacial cracks directly correlates with the restoration of compressive strength.
- Findings support the practical application of post-fire curing for damaged concrete structures.
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