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← TechnologyWhich risk increases when rebar cage installation precedes concrete pouring in cold weather conditions?
A)Formation of thermal stress cracks✓
B)Reduced concrete compressive strength
C)Accelerated rebar corrosion from carbonation
D)Increased concrete segregation during vibration
💡 Explanation
When rebar is exposed to significant cold before concrete pouring, large temperature gradients develop during hydration generating thermal stress because the concrete heats up while rebar remains cold, leading to cracking. Therefore thermal stress cracks are the risk, rather than compressive strength, corrosion, or segregation which involve fundamentally different mechanisms.
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