Which disadvantage arises when post-tensioned concrete bridge decks experience excessive chloride ion penetration?

💡 Explanation

When chloride ions penetrate post-tensioned decks, pitting corrosion initiates around the steel tendons because the chloride destroys the passive layer protecting the steel, increasing the vulnerability to stress corrosion cracking and fatigue under cyclic loading. Therefore increased fatigue failure risk results, rather than reduced concrete strength, carbonation or thermal effects which involve deterioration of the concrete mass.

• Which unstable outcome always occurs when inductive current switching affects a high-voltage DC transmission breaker circuit?
• Which outcome occurs during brazing of refrigeration lines with excessive oxygen flow?
• Which risk increases significantly when high-speed tool steel lathes reach their critical temperature?
• Which microstructural outcome occurs when forging metals lacking preheating?
• Which risk increases when uneven connecting rod bearing wear alters crankshaft journal alignment?
• Which outcome occurs when achieving specified casting tolerances necessitates extensive secondary machining?