RAMAKRISHNA MISSION SHILPAMANDIRA

SUBHABRATA DATTA DCE-2ND YEAR

ROLL-50

HOLLOW BRICKS

CONCRETE HOLLOW BLOCKS• Is a large rectangular brick used in

construction.

• Portland cement and aggregate, usually sand and fine gravel for high-density blocks.

• Size -12x8x4 inch

BASIC INFORMATION

COMMON PARTS

DESCRIPTION• Have one or more hollow cores.

• In general, a hollow-core concrete block is more than 50 % solid.

• Standard hollow concrete blocks come in full and half sizes.

• Full-size blocks are rectangular and have two cores.

• Half size blocks are cubical and have one core.

Raw Materials Required

CementSand

GravelsWater

Production Processes1. Raw Materials Mixing2. Brick/Block Molding3. Vibrating & Compacting4. Curing/Drying5. Brick/Block Packing

Manufacturing Process• Cement concrete blocks are - solid or

hollow. • The blocks sizes are - 12x8x4"; 12x8x3";

12x8x6", etc.• Cement, stone chips, sand, etc. are mixed

in the ratio of 1:6 or 1:12.• vibrate the mixture and then poured into the

desired size mould .• After 24 hours of drying, the blocks are put

in water tank for curing. • Curing time - two to three weeks to give the

blocks compression strength.

• Highly Durable: The good concrete compacted by high pressure and vibration gives substantial strength to the block. Proper curing increase compressive strength of the blocks.

• Low Maintenance • Fire Resistant• Provide thermal and sound insulation• Economical• Environment Friendly

ADVANTAGES OF HOLLOW BRICKS

STRUCTURAL ADVANTAGES

• Reducing the vulnerability (exposed to damage) of disastrous damage to the structure/building, during the natural hazards.

• Provide and offer better resistance under dynamic loading

CONSTRUCTIONAL ADVANTAGES• No additional formwork or any special

construction machinery is required for reinforcing the hollow block masonry.

• Only semi-skilled labour is required for this type of construction.

• It is a faster and easier construction system, when compared to the other conventional construction systems.

• It is also found to be a cost-effective disaster resistant construction system

ARCHITECTURAL AND OTHER ADVANTAGES

• This construction system provides better acoustic and thermal insulation for the building.

• Faster construction: - Easy to work with bigger in size.

• Recommended for earth quake resistance.

• Less water absorption:- Approx. 3 to 4%

• Environmental Eco-Friendly

• This system is durable and maintenance free.

• No leaching: - Reduction in maintenance.

THANK YOU