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contact name : Rao
contact name : Rao
Parameters
|
Lightweight Concrete
|
Burnt Clay Bricks
|
Concrete (Hollow Core) Blocks
|
|
CLC
Foam Concrete
|
AAC
Aerated Autoclaved Concrete
|
|||
Basic raw materials
|
Cement, fly ash, water and foam
|
Cement, lime, specially grinded sand,aeration
compound, high primary energy input
|
Top agricultural soil, primary energy input
|
Cement, sand, aggregate
|
Production process and set-up
|
Using ribbon mixer and foam generator
|
Produced only in well
established plant, equipped with steam boiler and high pressure auto-claves
|
Processed in specially
erected or central brick kilns
|
Mobile or stationary
|
Dry density kg/m³
|
300-600/ 800-1000 /1200-
1800 |
400-700
|
1900
|
1700
|
Compressive
Strength kg/
cm2 |
4-10 / 25-35 / 125--250
|
20-40
|
30-80
|
30-150
|
Usage
|
Thermal insulation ,
partitions, non-load bearing
blocks
|
Non-load bearing panels and
blocks
|
Load bearing & non-load
bearing walls
|
Load bearing & non-load
bearing walls
|
Block / element size and shape
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Any size, shape given by
mould/cut
|
Typically shape and size
|
Typically size
|
|
Compaction during production
|
None
|
None
|
Yes
|
Yes
|
Aging
|
Gains strength with age
(like conventional concrete)
|
No aging
Loses strength, if not
protected against humidity
|
No
|
Yes
|
Thermal conductivity (W/mK)
|
0.09 – 0.12 (depending on
density)
|
0.09-0.15
(depending on density)
|
0.4
|
2.1
|
Sound insulation
|
Superior
|
Superior
|
Normal
|
Better
|
Ease of working
|
Superior:
Can be cut, sawn, nailed,
drilled, ordinary mortar/plaster
|
Superior:
Can be cut, sawn, nailed,
drilled,
Special mortar (glue) and
plaster is required
|
Normal
|
Difficult
|
Eco friendliness
|
- Pollution free
- No primary energy
consumption
- Can consume fly ash (waste
material)
|
- Pollution free
- High energy consumption
|
- Creates smoke
- high energy consumption
- wastes agricultural land
- soil erosion
- banned in more and more
countries
|
- low energy
- no smoke
|
Note: The
structural savings in the cost of steel and concrete due to reduced weight of
walls would be additional advantage, as well as savings in transportation,
foundation, piling and crane handling
|
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