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← TechnologyWhich outcome occurs when significant chloride ingress reaches reinforcing steel within a concrete beam?
A)Formation of expansive rust leading to spalling✓
B)Dissolution of the concrete matrix reducing alkalinity
C)Reduction in the concrete's tensile strength
D)Increased bonding between steel through oxidation forces
💡 Explanation
When chloride ions reach the rebar, depassivation occurs because they break down the protective passive layer, causing corrosion. Therefore formation of expansive rust results which stresses the concrete, leading to spalling, rather than dissolution, decreased strength or bonding without ongoing oxidation.
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