Cover blocks are used to maintain a specified distance between the TMT rebar and the shuttering.
or
A cover block is essentially a spacer that is used to lift the rebar matrix off the ground so that concrete may flow underneath the rebar.
Why we must use cover blocks?
- When doing RCC work it is important to embed the steel in the concrete (also known as cover) so that the rebar doesn’t corrode and to provide fire protection to the rebar.
- If we don’t provide the recommended cover the rebar will corrode with time and will ultimately result in premature failure of the structure.
- Thus using cover blocks enhances the life of the structure significantly without adding much to the cost.
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ReplyDeleteConcrete cover blocks are a type of concrete masonry unit (CMU) designed for the purpose of providing a protective covering for reinforcing steel in concrete structures. They are made from a combination of cement, sand and water, and are available in a variety of sizes, shapes, and colors. Concrete cover blocks are used in the construction of foundations, walls, columns, beams, and other structural elements. They provide a durable, weather-resistant layer of protection against corrosion and environmental degradation. Concrete cover blocks also reduce the need to use additional reinforcing steel in the structure, which can reduce overall construction costs.
ReplyDeleteThe spacer is actually a device to create a distance between the rebars and create a protective coating on them to prevent rotting and rusting.
ReplyDeleteCover blocks are used in a variety of concrete constructions, including beams, columns, and slabs. Furthermore, there are several benefits to employing cover blocks. Describe Cover Block. Its purpose is to shield the steel reinforcing bars from the impacts of the environment. Maintains the necessary space between the rebar and the shuttering using a cover block. The reinforcing bars are shielded from fire by the thermal insulation that is provided. By employing cover blocks, we can properly compress the concrete; otherwise, the steel bar can move from its position. It is used to maintain a minimal and efficient cover distance.
ReplyDeleteCover blocks are used in a variety of concrete constructions, including beams, columns, and slabs. Furthermore, there are several benefits to employing cover blocks. Describe Cover Block. Its purpose is to shield the steel reinforcing bars from the impacts of the environment. Maintains the necessary space between the rebar and the shuttering using a cover block. The reinforcing bars are shielded from fire by the thermal insulation that is provided. By employing cover blocks, we can properly compress the concrete; otherwise, the steel bar can move from its position. It is used to maintain a minimal and efficient cover distance.
ReplyDeleteAlong with the shuttering, a 25 mm cover block of concrete is used. The placement of the 25 mm cover block with reinforcement to determine the true spacing of the beam is shown in the figure with clarity. 40 mm Cover Block: Set the cover block in a position that fits the plywood. See how it is holding the shuttering and the bar below.
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