Massachusetts Construction Supervisor License (CSL) Practice Test

What kind of reinforcement is typically used in concrete slabs?

1. A. Fiber reinforcement

2. B. Steel reinforcement

3. C. Wood reinforcement

4. D. Plastic reinforcement

The correct answer is: B. Steel reinforcement

Steel reinforcement is commonly used in concrete slabs due to its ability to significantly enhance the tensile strength of the concrete. While concrete is strong in compression, it is relatively weak in tension, which can lead to cracking under stress, temperature changes, or settling. By embedding steel bars or mesh within the concrete, known as rebar, the composite material can withstand bending and stretching forces much better. Steel’s high tensile strength and ability to bond well with concrete make it an ideal choice for reinforcement. The combination allows for the creation of thinner slabs than would be possible with concrete alone, ultimately resulting in cost savings while maintaining structural integrity. Additionally, steel reinforcement comes in various forms, including rebar and welded wire fabric, providing versatility in design and application, regardless of the specific load-bearing requirements. The use of fiber, wood, or plastic reinforcement is less common in standard concrete slabs and typically meant for specialized applications or improvements in specific properties rather than the general structural needs of standard concrete work.