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A concrete cover block is a small spacer used in construction to keep steel reinforcement bars at the correct distance from the outer surface of the concrete. Why Cover Blocks Matter
• Prevents Rust: Keeps steel bars away from moisture and air to stop corrosion.
• Fire Protection: Adds a thermal barrier so fire does not damage the steel quickly.
• Holds Shape: Stops steel rods from moving when workers pour wet concrete.
• Longer Life: Makes the entire building or structure last much longer.
Common Sizes and Where They Are Used
• 20 mm: Used for floor slabs.
• 25 mm: Used for beams.
• 40 mm to 50 mm: Used for columns and footings.
• 75 mm or more: Used for heavy raft foundations.
Materials and Prices
• Concrete Blocks: Made from strong cement mortar (often M40 to M60 grade). They cost about ₹1.50 to ₹5 per piece depending on size and strength.
• Plastic Blocks: Lightweight alternatives often shaped like small wheels or chairs. Local suppliers and manufacturers in areas like offer bulk packets.
If you are planning a construction project, tell me:
• What type of structure are you building (slab, column, or footing)?
• How many pieces or what size do you need?
I can help you figure out the exact requirements or spacing rules.
A concrete cover block is a small spacer used in construction to keep steel reinforcement bars at the correct distance from the outer surface of the concrete. Why Cover Blocks Matter
• Prevents Rust: Keeps steel bars away from moisture and air to stop corrosion.
• Fire Protection: Adds a thermal barrier so fire does not damage the steel quickly.
• Holds Shape: Stops steel rods from moving when workers pour wet concrete.
• Longer Life: Makes the entire building or structure last much longer.
Common Sizes and Where They Are Used
• 20 mm: Used for floor slabs.
• 25 mm: Used for beams.
• 40 mm to 50 mm: Used for columns and footings.
• 75 mm or more: Used for heavy raft foundations.
Materials and Prices
• Concrete Blocks: Made from strong cement mortar (often M40 to M60 grade). They cost about ₹1.50 to ₹5 per piece depending on size and strength.
• Plastic Blocks: Lightweight alternatives often shaped like small wheels or chairs. Local suppliers and manufacturers in areas like offer bulk packets.
If you are planning a construction project, tell me:
• What type of structure are you building (slab, column, or footing)?
• How many pieces or what size do you need?
I can help you figure out the exact requirements or spacing rules.
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