Cover

In reinforced concrete, the depth or thickness of concrete between the outermost reinforcing bars and the surface.

Purpose

Cover in reinforced concrete protects the reinforcing bars from environmental elements, such as moisture and chemicals, which can cause corrosion and reduce the structure's durability. It also contributes to the overall fire resistance of the concrete element.

Examples of Use

1. Ensuring the correct cover in a reinforced concrete beam to protect the steel reinforcement from corrosion.
2. Applying sufficient cover in concrete columns to enhance their durability and fire resistance.
3. Using appropriate cover in concrete slabs to maintain structural integrity and longevity.

Related Terms

• Rebar (Reinforcing Bar): Steel bars embedded in concrete to provide tensile strength.
• Concrete Mix: The combination of cement, water, and aggregates used to create concrete.
• Spalling: The breaking off of concrete surfaces, often due to inadequate cover or corrosion of rebar.

Notes

The required cover depth varies depending on environmental exposure conditions, structural requirements, and building codes. Adequate cover is critical for ensuring the long-term performance of reinforced concrete structures.