Which risk increases when post-tensioned concrete beam develops significant chloride ingress?

A)Brittle fracture of prestressing strands✓

B)Reduction concrete compressive strength

C)Buckling of beam under self-weight

D)Thermal expansion concrete exceed limits

💡 Explanation

When chloride ions penetrate concrete, chloride-induced corrosion occurs because the ions weaken the passive layer protecting the high-strength steel strands, leading to localized pitting and subsequent brittle fracture under tensile stress. Therefore, brittle fracture risk increases, rather than compressive strength reduction, buckling, or excessive thermal expansion which involve different degradation mechanisms.

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Which risk increases when post-tensioned concrete beam develops significant chloride ingress?

💡 Explanation

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