Which risk increases when improperly heat treating high-strength reinforcing bar (rebar) used in concrete structures?

💡 Explanation

When high-strength rebar is improperly heat treated, undesired microstructures form because the cooling rate doesn't allow proper martensite or bainite formation inhibiting dislocations, leading to a reduction in ductility. Therefore, brittle fracture risk increases, rather than corrosion which relates to surface chemistry, bond arising from surface adhesion and creep tied to viscolelastic properties.

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