Reinforcement Bar Size for a 75 mm Thick Concrete Slab

Introduction:
Reinforced concrete slabs are used in various construction projects, including buildings, bridges, and roads. The thickness of the slab and the size of the reinforcement bars used in its construction are important factors that affect its strength and durability. In this question, we need to determine the maximum size of reinforcement bar that can be used for a reinforced concrete slab that is 75 mm thick.

Factors Affecting the Size of Reinforcement Bar:
The size of the reinforcement bar used in a concrete slab depends on several factors, including the thickness of the slab, the type of reinforcement used, and the design requirements. In general, the larger the size of the reinforcement bar, the greater the tensile strength of the concrete slab. However, using very large reinforcement bars can lead to problems such as cracking, spalling, and corrosion.

Answer:
For a 75 mm thick reinforced concrete slab, the maximum size of reinforcement bar that can be used is 8 mm in diameter. This is because larger reinforcement bars are not practical for such a thin slab. Using larger bars can also lead to problems such as difficulty in placing and compacting the concrete, and increased risk of cracking and spalling due to the high stress concentration.

Conclusion:
In conclusion, the size of the reinforcement bar used in a reinforced concrete slab depends on several factors including the thickness of the slab, the type of reinforcement used, and the design requirements. For a 75 mm thick slab, the maximum size of reinforcement bar that can be used is 8 mm in diameter. It is important to choose the appropriate size of reinforcement bar to ensure the strength and durability of the concrete slab.