North Carolina General Contractors Practice Exam

What is a construction joint used for in concrete work?

1. To prevent moisture penetration

2. To allow for expansion of the structure

3. To provide a stopping point for day's work

4. To reinforce weaker sections

The correct answer is: To provide a stopping point for day's work

A construction joint is primarily used to provide a stopping point for the day's work, which is vital in concrete work. This type of joint allows for the safe interruption of the pouring process, enabling workers to effectively manage time and resources without compromising the overall integrity of the concrete structure. When concrete is poured continuously, it can lead to issues such as cold joints if the concrete begins to set before the entire structure is completed. By utilizing construction joints, workers can ensure each segment is properly cured and ready for further work without risking the quality and strength of the concrete. The joint provides a defined area where new concrete can be poured later, ensuring a proper bond and alignment when the continuation of work resumes. This also helps maintain construction schedules while ensuring that each portion meets structural requirements effectively. While other functions, such as preventing moisture penetration, allowance for expansion, or reinforcing weaker sections, are critical in different contexts of concrete work or for specific joint types, the primary role of a construction joint fundamentally revolves around managing work progress and ensuring the structure's integrity across different work shifts.