| 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 |