Florida DOT Concrete Batchman/Operator Practice Exam

What is a common characteristic of Calcium Nitrite?

1. It acts as a water reducer

2. It is used to improve color

3. It inhibits corrosion

4. It increases air content

The correct answer is: It inhibits corrosion

Calcium nitrite is primarily recognized for its ability to inhibit corrosion, particularly in reinforcing steel within concrete structures. This characteristic is essential in construction, especially in environments where concrete is prone to corrosion due to factors such as moisture and chloride exposure. By adding calcium nitrite to concrete mixtures, it creates a protective layer around the reinforcing steel that helps prevent rust formation, ultimately enhancing the durability and longevity of the concrete. The other options, while related to various additives used in concrete, do not accurately describe calcium nitrite’s primary function. The material is not typically used to reduce water content, enhance color, or intentionally increase air content in concrete mixtures. Thus, its role in corrosion inhibition stands out as a significant and beneficial characteristic.