Core TradesQuestion 2 of 700
An accelerating admixture such as a non-chloride accelerator is added to a concrete mix PRIMARILY to:
a.Reduce the amount of mixing water needed for a given slump
b.Delay the initial set so concrete can be hauled a long distance
c.Speed up early set and strength gain, which is useful in cold weather
d.Entrain microscopic air bubbles to resist freeze-thaw damage
Explanation
Accelerators shorten setting time and boost early strength, which helps when placing in cold conditions. Reducing water is the job of a water reducer, delaying set is a retarder's role, and entraining air bubbles is done by an air-entraining admixture.
Law Reference: 2025 CA Building Code (CBC) Chapter 19 (Concrete)Practice all 700 questions free — no signup required.
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