Brief

The Korea Institute of Civil Engineering and Building Technology has developed a new way to strengthen deteriorated concrete structures. A noncombustible carbon textile grid and cement mortar triple the cement’s usable life span and double its load-bearing capacities.

 

Insight

The Korea Institute of Civil Engineering and Building Technology (KICT) has announced the development of an effective structural strengthening method using a noncombustible carbon textile grid and cement mortar, which can double the load-bearing capacities of structurally deficient concrete structures and increase their usable lifespan by threefold.

More than 90% of infrastructures in South Korea, such as bridges and tunnels, as well as residential buildings were initially constructed out of concrete. For deteriorated or structurally deficient concrete structures in need of structural strengthening, carbon fiber sheets are typically applied to the surface of the concrete structure using organic adhesives.

However, organic adhesives are susceptible to fire and cannot be applied to structures with wet surfaces. These carbon fiber sheets may detach and fall from the structure if they are exposed to moisture.A research team in KICT, led by Dr. Hyeong-Yeol Kim, has developed an effective as well as efficient strengthening method for deteriorated concrete structures.

With the developed method, thin precast textile reinforced mortar (TRM) panels, which are made of a carbon textile grid and a thin layer of cement mortar, are used. Furthermore, the TRM strengthening method can be applied in the form of cast-in-place construction. ngthen highway facilities and parking buildings, where deicing agents are often used, as well as to strengthen offshore concrete structures that are exposed to a chloride-rich environment.

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