PPT ON HOLLOW BRICKS

1. RAMAKRISHNA MISSION SHILPAMANDIRA
SUBHABRATA DATTA
DCE-2ND YEAR
ROLL-50

2. HOLLOW BRICKS

3. 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

4. COMMON PARTS

5. 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.

6. Raw Materials Required
Cement
Sand
Gravels
Water

7. Production Processes
1. Raw Materials Mixing
2. Brick/Block Molding
3. Vibrating & Compacting
4. Curing/Drying
5. Brick/Block Packing

8. 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.

10. • 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

11. 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

12. 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

13. 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.