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In construction, what is the primary purpose of using an immersion-type concrete vibrator (or 'poker') when pouring fresh concrete?
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50-50
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A
To thoroughly blend aggregates and cement after the concrete is poured.
B
To accelerate the chemical curing time using friction and heat.
C
To remove trapped air bubbles and ensure the concrete consolidates evenly within the formwork.
D
To create a rough, non-slip texture on the final surface.
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