General Contractor Practice Exam

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When using epoxy coated zinc or dust coated reinforcing steel, what is the correct statement regarding durability?

Less concrete adhesion, less durable handling
More concrete adhesion, better handling
No impact on durability
Higher resistance to corrosion

The correct answer is: Less concrete adhesion, less durable handling

The correct statement regarding epoxy-coated zinc or dust-coated reinforcing steel is that it provides higher resistance to corrosion. When reinforcing steel is coated with epoxy or zinc dust, it enhances its durability by offering a protective layer that prevents corrosion when exposed to moisture and harsh environmental conditions, such as salty air or chemicals. This corrosion resistance is particularly important in structures that are subject to wet conditions or where de-icing salts are used, as it extends the lifespan of the reinforced concrete. Therefore, using epoxy or zinc coatings improves the overall durability of the reinforcing steel within concrete, ensuring that structures maintain their integrity over time. Additionally, while it might seem that these coatings could affect concrete adhesion, the protective properties greatly outweigh any potential negative impacts, ensuring not only durability in handling but also in longevity within the concrete structure.