Question

Normal weight and lightweight concrete exposed to freezing and thawing or deicing chemicals shall be:

1) Pre-stressed
2) Chemically treated
3) Air entrained
4) None of the above

Answer 1

Normal weight and lightweight concrete exposed to freezing and thawing or deicing chemicals should be air entrained.

Step-by-step explanation:

When normal weight and lightweight concrete are exposed to freezing and thawing or deicing chemicals, they should be air entrained. Air entrainment is the process of introducing tiny air bubbles into the concrete mix. These air bubbles act as small pressure relief valves, allowing the water in the concrete to expand and contract without causing damage. By incorporating air entrainment, the concrete becomes more resistant to freeze-thaw cycles and the harmful effects of deicing chemicals.