AAC (Autoclaved Aerated Concrete), is also known as autoclaved cellular concrete (ACC), these are Thermalite Blocks developed in the mid-1920s in Sweden. These are light-weight and pre-cast building materials that simultaneously provide structure, insulation, and fire and mold resistance. One of the major advantage of AAC over other cementitious construction materials is its lower impact on environment. It has no efflorescence emission (white salt appearance) at large.
It is highly thermal insulating product used for both internal and external construction. It is easy and quick to install since the material can be routed, sanded, and cut to size on site using standard carbon steel band saws, hand saws, and drills.
Major application of AAC products include light weight partition walls, protection of steel structure and lintels. The common sizes are (LxWxH) 600mm x 200mm x 200mm; 600mm x 150mm x 200mm; 600mm x 100mm x 200mm etc.
Regular cement mortar can be used, 98% of the buildings erected with AAC materials use thin bed mortar, which comes to deployment in a thickness of ? inch. AAC material can be coated with a tiles, stones compound or plaster against the elements. Siding materials such as brick or vinyl siding can also be used to cover the outside of AAC materials.
We are one of the largest manufacturers and exporters of AAC blocks in India. Based in Faridabad, we manufacture high quality AAC blocks using the AAC material that can be coated with tiles, stones compound or plaster against the element.
Details of Merits are being Provided here under-
1. High Thermal Insulation-
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These blocks have appx. 1/3 density that of Conventional Building Blocks.
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It has very low specific conductivity. This makes heating or cooling (Air Conditioning) very efficient.
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Generates regular saving on energy and global warming.
2.Light Weight -
With an approximate density of (450-550)Kg/M3, which is only one third of the weight of equivalent hollow concrete
blocks and half of the weight of light weight aggregate block, it reduces the loads on the concrete structure and
foundation of the building substantially. This saves construction time and the total materials required for the construction
of the entire buildings (saving 33% of dead load when using A.A.C Thermalite for the hourdi slabs and walls).
3. Superior Fire Resistance-
A 10 cm thick AAC Thermalite block provides a fire resistance value of 4
hours and 15 cm block 6 hours in accordance with BS-5628-3-
approximately twice more protection than the normal concrete. Therefore,
Thermalite is particularly suited for fire walls and fire protection of structural
steel.
4. Compressive Strength-
The block has an average compressive strength of (28-35) kg/cm2 which is superior to most types of light weight blocks, 25% more stronger than other products of the same density.
5.Workability-
It can be sawed, nailed and drilled easier than wood, by suitable tools
available for this purpose. It results in less wastage and keep the site clean.
6.Economical, Easier & Quicker to install-
Construction time is substantially reduced while Thermalite blocks are used. Thermalite blocks are large and
lighter than conventional blocks and hence can be installed at a quicker rate. Blocks are laid flush utilizing thin
joint mortar hence reducing mortar and plastering cost and eliminating thermal bridging.
7.Sound Insulation and absorption-
The cellular structure of AAC Blocks provides superior sound absorption and insulation, both of which
depend on density and porosity. The air porosity of the material will have significant effect on the performance of
the wall. The aerated structure of Thermalite consists of millions of very small non-interconnected air cells giving very low air
porosity. This gives a high resistance to the passage of air borne sound relative to density.
8.Environmentally Friendly-
Non-existence of toxic substances, less consumption of fuel, electricity and nominal wastage during production, saving of
electricity in large in Thermalite building - all these advantages of Thermalite reduces the environment pollution.
In fact, wherever Thermalite is used, energy is saved.
9.High Resistance to Air and Water Penetration-
The AAC Thermalite products, because of their cellular and discontinuous microstructure, are superior
to the normal concrete in resistance of water penetrability & thus the external surface of AAC Thermalite
walls provides superior resistance to air and moisture penetration than the traditional masonry products.
Thermalite is manufactured from non-biodegradable materials, which does not rot nor attract mould, keeping interiors clean
and durable.
10.Durability & Dimensional Stability-
The AAC products have been in use for nearly 70 years. Since then, the production has spread to most parts
of the world and the material has proved its durability under extremely different climatic and chemical
conditions. The linear expansion coefficient of Thermalite is approximately 0.02%
Project at a Glance
Capacity 50000 CBM (in shape of blocks of 0.75 density and size 600x200x200) Equivalent to 2.5 crores ordinary brick of density 1.9 size 230x110x75
S.No
Description
Estimated Cost (Rupees in Crores)
1.
Land 3 acres
1.50
2.0.
Plant Equipments & Machines
2.1.
Imported (Details Annex-I)
4.00
2.2.
Indian (Details Annex-2)
2.00
2.3.
Building Civil Work
2.00
2.4.
Delivery Vehicles
.50
2.5.
Loaders & Forklift
.35
3.
Working Capital 5000 CBM/Month
@Rs1500/Per CBM
0.75
4.
Salary & Wages/Month
0.05
5.
Annual Sales 45000 CBM per year @Rs3200/CBM
14.40
6.
Annual Variable cost for 45000+2% wastage 45900 CBM x1500/CBM
6.9
7.
Annual Salary Rs.0.05 x 12
0.60
8.
Annual Maintenance Cost
0.90
9.
Transportation
.80
10.
Miscellaneous
.50
Gross Profit before depreciation
6.00
Power- 295.5KW
Direct Labour & Raw Material Cost/CBM(Vary from Place to Place)
By Flyash Route
Rs
By Sand Route
Rs
500 Kg. Flyash
100 Kg Lime (CaO)
80Kg x 6 Cement
75 Gypsum
Aluminium Powder
Energy (25 Units x6)
Labour
800.00
250.00
480.00
150.00
50.00
150.00
50.00
500 Kg. Sand
100 Kg Lime (CaO)
80Kg x 6 Cement
75 Gypsum
Aluminium Powder
Energy (25 Units x6)
Labour
175.00
250.00
480.00
150.00
50.00
150.00
50.00
1930.00
1305.00
Extra- Cost of Interest & Depreciation + Maintenance Charges
