Construction With AAC Blocks

What is ACC Blocks

Autoclaved aerated concrete (AAC), also known as autoclaved cellular concrete (ACC), autoclaved lightweight concrete (ALC), is a lightweight, precast, concrete building material invented in the mid-1920s that simultaneously provides structure, insulation, and fire- and mold-resistance. AAC products include blocks, wall panels, floor and roof panels, cladding (facade) panels and lintels.

A quick comparison between AAC blocks vs clay bricks

AAC blocks are a relatively new phenomenon in Indian construction industry. Although first AAC blocks plant in India was set up in early 1970s by Siporex at Pune.

 

Serial

Parameter

AAC Blocks

Clay Bricks

1

Soil Consumption

Zero soil consumption. Primary raw material for AAC blocks is fly ash. This fly ash is industrial waste generated by coal-based thermal power plants.

One sq ft of carpet area with clay brick walling will consume 25.5 kg of top soil.

2

Fuel Consumption

One sq ft of carpet area with AAC blocks will consume 1 kg of coal.

One sq ft of carpet area with clay bricks will consume 8 kg of coal.

3

CO2 Emission

One sq ft of carpet area will emit 2.2 kg of CO2.

One sq ft of carpet area will emit 17.6 kg of CO2.

4

Labour

Organized sector with proper HR practices.

Unorganized sector with rampant use of child labour.

5

Production Facility

State-of-the-art factory facility.

Unhealthy working conditions due to toxic gases.

6

Tax Contribution

Contributes to government taxes in form of Central Excise, VAT and Octroi.

Does not contribute to government exchequer.

7

Size

600 / 625 mm x 200 / 240 mm x 100-300 mm

225 mm x 100 mm x 65 mm

8

Variation in Size

1.5 mm (+/-)

5 mm (+/-)

9

Compressive Strength

3-4 N/m2

2.5-3 N/m2

10

Dry Density

550-700 kg/m3

1800 kg/ m3

11

Fire Resistance (8″ wall)

Up to 7 hours.

Around 2 hours

12

Cost Benefit

Reduction in dead weight leading to savings in steel and concrete.

None

13

Energy Saving

Approximately 30% for heating and cooling.

None

 

Who can use ACC Blocks:

All leading builders and architects/ firms that have well learned and technically updated team of planning engineers and execution engineers are using the modern blocks.

 

Who are manufacturing it:

All major cement companies like Ultratech, JK etc. and many hitech entrepreneurs have entered into AAC blocks manufacturing

 


Photo :http://www.aac-india.com/aac-blocks-vs-clay-bricks/