Q: Why are glass fibers twisted during the manufacturing of GF-Bar?
A: It is to ensure strength and durability by combining them with impregnation materials.
Q: Why is GFRP essential for structures built over the sea, such as the Gadeokdo New Airport?
A: To fundamentally prevent structural deterioration caused by salt in the air and seawater.
Q: What is the greatest advantage of carbon fiber reinforcing bars?
A: Very high strength and elastic modulus.
Q: Why are GFRP reinforcing bars lighter than steel rebar?
A: Because they are composed of low-density polymers and glass fibers.
Q: What is the biggest construction advantage of GFRP (Glass Fiber Reinforced Plastic) reinforcing bars at a construction site?
A: They are very light, making them easy to transport—enough for a single worker to lift and move them in bundles.
Q: What happens to steel rebar when de-icing agents seep into the bridge deck?
A: Corrosion and expansion due to oxidation reactions.
Q: What is the greatest benefit of using GF-Bar instead of rebar for bridge decks?
A: Since it does not rust, the bridge can be used for a very long time.
Q: According to actual factory construction experience, why do fewer cracks occur when using GFRP compared to when using rebar?
A: This is because GFRP is composed of plastic, so the temperature gradient due to temperature changes is smaller compared to rebar.
Q: Why is the adoption of GFRP more active in the civil engineering sector than in architecture?
A: This is because relevant structural design standards are already established to some extent in civil engineering.
Q: What are the main areas where GFRP can be applied instead of steel floors during factory foundation construction?
A: Floor slab structures.
Q: What are the representative planned construction sites prone to salt damage due to proximity to seawater?
A: Areas near the East Sea coast, such as the Gadeokdo New Airport.
Q: Why can reinforcing bars corrode even without direct contact with seawater?
A: This is because salt from seawater can penetrate through the groundwater level.
Q: What is the physical disharmony that occurs between concrete and rebar at night when temperature fluctuations are severe?
A: Interfacial heterogeneity caused by differences in thermal expansion and contraction.
