FAQs
Frequently Asked Questions (FAQs)
A: In reinforce concrete, the thickness or cover of concrete between the reinforcement bar (Rebar) and the outside face of the concrete is called Concrete cover.
A: Nominal cover (or clear cover) is the distance between the rebar and outer surface of the concrete. It is a requirement set by the standard Code of Practice against adverse environmental conditions (i.e corrosion, fire etc). While effective cover is the distance from surface of the concrete to the centre of reinforcement.
A: Cover blocks (also called spacers or concrete spacers or concrete cushions) are small but essential components used to lift the rebar matrix off the ground/formwork so that concrete can flow underneath the rebars during concreting.
A: The primary purpose of using concrete cover blocks is to ensure that the specified distance between the rebars and the outer surface of concrete structures is achieved. This concrete cover protects the steel from environmental factors, such as moisture and corrosion, ensuring the structural durability and longevity of the reinforced concrete.
A: Concrete cover blocks are placed at regular intervals along the length of reinforcing bars before pouring concrete. They help in achieving the correct concrete cover thickness as specified in the design and ensure uniform volume of concrete around the reinforcement.
A: Concrete cover blocks come in various shapes, sizes, and materials. Common types include circular, rectangular, and cylindrical blocks, as well as cover blocks made from plastic, concrete, or other materials.
A: Without the use of cover blocks, there will be:
