Are aac blocks strong?

AAC blocks have a higher compressive strength.

Red clay bricks are made from a combination of clay (alumina), sand, lime, iron oxide, and magnesia, and are widely available throughout the country. AAC blocks are made from a mixture of fly ash, cement, lime, gypsum, and aeration agents and need development and production from specialized factories.

                                           While red clay bricks are widely available, they do not provide superior compressive strength in comparison to AAC blocks, which are crafted to become more resilient to compression load. Red bricks have a compressive strength of 2.5 to 3.5 N/mm2, whereas AAC blocks have a compressive strength of 3 to 4.5 N/mm2.

SR NO	PARAMETER	AAC BLOCKS	RED CLAY BRICKS
1	Size	600x200x100-300 mm	230x75x150 mm
2	Accuracy	Variation 1.5 mm (+/-)	Variation 5 mm (+/-)
3	Compressive Strength	3-5 Mpa	1.5-2 Mpa
4	Mortar Consumption per cum with 1:6	0.5 Bag of cement	1.35 Bag of cement
5	Chemical Composition	Fly-ash is used approx. 60% which reacts with binders (lime and cement) to form AAC which is an inert material	Soil is used which contains many inorganic impurities like sulfates which result in efflorescence
6	CO2 Emission per square foot	2.2 kg	17.6 kg
7	Dry Density	550-650 kg/m3 (Oven Dry)	1900 kg/m3
8	Fire Resistance	Up to 7 hours	Up to 2 hours
9	Cost-Benefit Factor	Depending upon project design, savings up to 20% in structural costs can be achieved due to reduction of dead load	None
10	Energy Saving	Up to 30% savings can be achieved in heating and cooling costs due to excellent insulation	None
11	Plastering Material	Exceptional dimensional accuracy allows for a final 6 mm skim coat	Traditional 3 coat plaster is required
12	Breakages	3%	15%
13	Environmental Impact	A green building product as there is no pollutant or discharge in the manufacturing process	Erosion of fertile topsoil is a crime against nature

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