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Research Achievements

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Titel [2015] World’s First Technology to Evaluate the Durability of Fire Damaged Structures and Predict the Remaining Service Life
Manage Fire Investigation, Research, testing and Education Date 2016.11.21 Hit 818

 

Project Leader: Heo Young-sun (Senior Researcher, youngsun.heo@kict.re.kr)

 

 

 

Concrete remains in stable condition in the atmosphere. However, when it is exposed to high temperature, as in a fire, the chemical bonding of hydration products is broken and thereby, the concrete remains in an unstable condition. As time passes, it can collapse due to long-term aging through such as rehydration, recarbonation, and DEF (delayed ettringite formation). This is the unique phenomenon only observed in hardened concrete. KICT intends to develop a standard directory by analyzing the early and latter behavior of concrete constituents exposed to elevated temperatures and then apply to investigate the damage level of concrete structures by prediction, analysis and evaluation of the secondary behavior of fire damaged structures within a short period of time.

 

 

 

Research Background and Necessity

As fire accidents increase in Korea, the need to review the safety condition of structures after a fire also increases. This led to the need to develop a fire diagnosis method and remaining durability evaluation tool, both technologies that are not currently available in Korea. There is also a need to scientifically train fire specialists to ease increasing public anxiety.

 

 

Research Contents

The eventual goal of this research is to develop the world’s first technology to evaluate the remaining service life of fire damaged concrete structure as the original technology of fire forensic investigation. The details of this research include the prediction of fire damage temperature, post-fire pore analysis, post-fire durability analysis, and evaluation of remaining life of fire damaged structure.

 

 

 Chemical analysis of samples obtained from fire damaged concrete (FT-IR)
 Chemical analysis of samples obtained from fire damaged concrete (FT-IR)

 

 Chemical analysis of samples obtained from fire damaged concrete (XRD)   Pore structure analysis of samples obtained from fire damaged concrete (MIP)
Chemical analysis of samples obtained from fire damaged concrete (XRD)  Pore structure analysis of samples obtained from fire damaged concrete (MIP)

  

 

 

Research Results

This research developed the original technology to evaluate the residual durability and predict the remaining life of fire damaged structures. It has deduced the following results up until now.

• 1 domestic patent registered

• 1 international patent pending

• 2 academic papers published in SCI

• 2 academic papers published in SCIE

• 1 standardization directory to predict the fire damage temperature

• 1 academic paper submitted to SCI

• Development of software for fire investigation of concrete structures (in progress)

• Development of simulation for fire investigation of concrete structures (in progress)

 

 

 

  Result of X-ray computational tomography test of fire damaged concrete Result of X-ray computational tomography test of fire damaged concrete Result of X-ray computational tomography test of fire damaged concrete
 Result of X-ray computational tomography test of fire damaged concrete

 

 

 

Utilization and Impact

This research is expected to lead to the securing of original technology for fire diagnosis and act as key data for repair and reinforcement. It can serve to offer a clear guideline for judging the level of fire damage of concrete structures and will be the driving force for the creation of a new market for fire forensic investigation of structures (F2IS). Moreover, the trained fire diagnosis specialists are expected to play an active role in the domestic market. The technology can be used to evaluate the durability of fire damaged concrete structures and predict the changed lifecycle. In addition, application of this technology can prevent the decline of structures’ lifespan following poor repair/reinforcement and save the early rebuilding cost. As the world’s first original technology, it is expected to be exported to other countries such as Denmark, which is very strong in the area of fire forensic investigation.

 

 

 Fire forensic investigation process to evaluate the remaining service life of fire-damaged concrete
 Fire forensic investigation process to evaluate the remaining service life of fire-damaged concrete
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