Comparative Analysis of Autoclaved Aerated Concrete Blocks with Burnt Clay Bricks

Autoclaved Aerated Concrete (AAC) is a viable alternative to burnt bricks.. AAC is a high-performance building material. In recent years, AAC has become increasingly popular for the interiors of industrial, commercial, and residential structures. It provides great thermal and acoustic insulation while also protecting against fire and earthquakes.

We give you a brief comparison between AAC blocks Vs Red bricks to help you make the right and informed choice.

S. No.	Parameters	Autoclaved Aerated Concrete Blocks	Burnt Clay Bricks
1.	Basic raw materials & other inputs	Cement, Fly Ash & Acration Compound	Top Soil & Energy
2.	General Properties
	Dry Density kg/m3	600	1900
	Compressive Strength in kg/cm3	40	40-75
	Range of applications / utility	Non-load bearing blocks	Load-bearing & non-load bearing
	Aging	No gain in strength with age	No gain in strength with age
	Thermal Conductivity (W/m.k.)	0.132-0.151 for 600 kg/m3	0.184
	Sound Insulation	Superior than burnt clay & hollow concrete	Normal
	Ease of Working	Can be cut, nailed & drilled	Normal
3.	Shape & Form
	Pre-cast Brick size	600 x 200 x 100/150/200 mm	230 x 100 x 70 mm
	Pre-cast elements	Any size of elements	Not feasible
	Cast in shape	Not feasible	Not feasible
4.	Water Absorption % by weight	45% by volume	20% by volume
5.	Drying Shrinkage mm/meter	Shrinkage after maturing0.011 (for 600 kg/m3) 0.058 (for kg/m3)	No shrinkage
6.	Productivity	Output 100% more than brick work	Normal
7.	Eco Friendliness	Pollution freeHigh energy requirement Open process uses fly ash	Creates smokeUses high energy Wastes agricultural land
8.	Structural saving due to dead weight reduction	55% reduction in weight of walls. Tremendous structural saving for high rise buildings in Earthquake / Poor soil area	No additional saving