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← TechnologyWhich risk increases when concrete nears the complete hydration point in bridge support columns?
A)Autogenous shrinkage stress accumulates.✓
B)Alkali-silica reaction rate slows.
C)Creep deformation rates accelerate.
D)Carbonation depth sharply decreases.
💡 Explanation
Autogenous shrinkage stress accumulates in concrete bridge columns because the internal chemical reactions consume more water during further stages hydration, establishing self-desiccation. This initiates internal tensile stresses therefore increasing cracking risk, rather than improved behavior.
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