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← TechnologyWhich risk increases when concrete pour rate around rebar cages is excessively high in formwork?
A)Reduced lifespan from accelerated spalling
B)Reduced strength from rebar displacement
C)Reduced ductility from brittle fracture
D)Reduced capacity from concrete segregation✓
💡 Explanation
When the concrete pour rate around rebar cages is too high, concrete segregation occurs because of the differential settling of coarse aggregates, leading to non-uniform concrete mix. Therefore, a reduced capacity results, rather than accelerated spalling, rebar displacement, or fracture, which depend on different mechanisms.
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