Red Seal Concrete Finisher Practice Exam

What does "spalling" refer to in concrete terminology?

1. The process of mixing concrete

2. The flaking or chipping of the concrete surface

3. The method of curing concrete

4. The addition of reinforcement

The correct answer is: The flaking or chipping of the concrete surface

"Spalling" refers specifically to the flaking or chipping of the concrete surface, which can occur due to various factors such as freeze-thaw cycles, improper curing, or exposure to aggressive chemicals. This phenomenon typically affects the durability and aesthetic quality of concrete surfaces, leading to potential structural issues if not addressed. When spalling occurs, it can expose the underlying layers of concrete and possibly the reinforcement embedded within, making it critical for concrete finishers to recognize and address the conditions leading to spalling in their work. Understanding this term is essential for professionals in the concrete industry, as it can influence project evaluation, maintenance planning, and the selection of appropriate repair techniques. For example, if a concrete slab begins to spall, mitigating that issue may require different methods and materials than those used for mixing or curing concrete, which are distinct processes unrelated to spalling.