ACI Flatwork Technician Practice Questions - ACI Concrete Flatwork Technician (Flatwork Associate) Exam

What is the main purpose of an air-entraining admixture in exterior concrete flatwork?

To improve resistance to freeze-thaw damage To accelerate the setting time of the concrete To increase the compressive strength of the concrete To reduce the required water content by 20%

Correct Answer:

To improve resistance to freeze-thaw damage

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