Comparison of AAC Block

Comparison of AAC Block, Clay Brick, CLC Brick

Comparison of Various Bricks And Blocks (AAC Blocks Vs. CLC Blocks Vs. Red Clay Bricks)

S.No Parameter AAC Blocks Red Clay Bricks CLC Blocks
1 Raw Materials Cement, fly ash, water and Air entraining agents Locally avaiable clay Cement, lime, specially grinded sand, foam
2 Size 400-600mm X 200mm X 150mm – 300mm 225mm X 75mm X 100/150mm 400-600 x 200 x 100/150/200 mm
3 Variation Size 1.5 mm (+/-) 5 mm (+/-) 5 mm (+/-)
4 Compressive Strength (As per IS codes) 3-4 N/mm2 3.5 N/mm2 2 -2.5 kg/cm2
5 Dry Density (As per IS codes) 550-650 kg/m3 Its one-third of the weight of clay brick which makes it easy to lift and transport 1800 kg/m3 800 kg/m3
6 Cost Benefit For high rise buildings there will be reduction of Dead weight which leads to saving in Concrete and steel quantities. As easily available in local market hence it is beneficiary for low rise structure. For high rise buildings there will be reduction of Dead weight which leads to saving in Concrete and steel quantities.
7 Fire Resistance (8″ Wall) Upto 4 Hours Around 2 Hours Around 4 Hours
8 Quality of End Product Factory made product. So the quality of end product is consistent and good Locally made product. Quality depends on various parameters like quality of raw materials used, process of manufacture etc., The quality of the end product depends on the foam used and degree of quality control
9 Sound Insulation Better Sound absoprtion/insulation as compared to bricks Normal Better Sound absoprtion/insulation as compared to bricks
10 Energy Saving Low thermal conductivity (0.24 Kw-M/C) helps in saving electricity costs 30% for heating and cooling of house High thermal Conductivity (0.81 Kw-M/C). So no significant cost savings Low thermal conductivity (0.32 Kw-M/C) helps in saving electricity costs 30% for heating and cooling of house
11 Environmental Friendliness In AAC Block there is no top soil consumption and it emits very low Carbon dioxide as compare to Red clay bricks while manufacturing One sq ft of carpet area with clay brick walling will consume 25.5 kg of top soil (approx). It actually damages environment In CLC Block there is no top soil consumption and it emits very low Carbon dioxide as compare to Red clay bricks while manufacturing.
12 Internal and External Plaster As these bricks have dimensional accuracy, the internal and extenal plaster thickness can be reduced Requires thick plaster surface as there are variations in the dimensions As these bricks have dimensional accuracy, the internal and external plaster thickness can be reduced
13 Finishing excellent Very bad Not linear
14 Joining Process Chemical mortars can be used for joining the brick. This reduces the material consumption fo cement and also avoids curing process Traditional mortar needs to be used and the brick work should be cured atleast for 7 days before plastering Chemical mortars can be used for joining the brick. This reduces the material consumption of cement and also avoids curing process.
15 Availability Factory setup cost is high.Not many factories, so availability is a concern. Available locally in all cities and villages. Factory setup cost is low as compared to AAC. Also takes long time to produce if steam curing is not used.Timely availability is a concern.
16 Thermal Insulator AAC Blocks are very good thermal insulator if cooling is an major component of any building monthly expenses it will save cost for entire lifetime It have low thermal insulation as compare to AAC and CLC Block CLC Blocks are very good thermal insulator if cooling is an major component of any building monthly expenses it will save cost for entire lifetime
17 Tax Contribution GST REFUNDABLE No Tax Contribution GST REFUNDABLE
18 Cylindrical Structures For Cylindrical structure these blocks are not much useful Cylindrical manholes or sewage chambers need small size of bricks so that the curvature can be formed hence Red clay bricks are useful For Cylindrical structure these blocks are not much useful
19 Water Absorption Absorb 12- 15% by total volume of AAC blocks Absorb 17 -20% by total volume of red clay brick Absorb 12-15% of water by total volume of Block
20 Range of Application They are suitable for Non load bearing or RCC structure in partition wall They are useful in both load bearing and non load bearing structure They are suitable for Non load bearing or RCC structure in partition wall