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Autoclaved Aerated Concrete Blocks

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Autoclaved Aerated Concrete Blocks Specification

Cavity
Solid, non-cavity

Dry Density Grade
400 700 kg/m

Thickness
100 mm, 150 mm, 200 mm, 225 mm, 250 mm and custom options

Color
Light Grey to White

Carbonation Coefficient
Low carbonation rate

Oftening Coefficient
0.88 0.95

Frost Resistance
High

Porosity
High (70% to 85%)

Material
Autoclaved Aerated Concrete (AAC)

Strength
High load-bearing

Usage & Applications
Internal and external walls, partitions, infill panels, firewalls, sound insulation

Density
Gram per cubic centimeter(g/cm3)

Water Absorption
20 25% by mass

Method
Autoclaved

Width
200 mm, 240 mm, 250 mm, custom sizes

Moisture Content
5 12% (by weight)

Length
600 mm standard

Drying Shrinkage
0.02% 0.004%

Type
Aerated Concrete Block

Thermal Conductivity
0.11 0.18 W/mK

Compressive Strength
3.5 7 MPa

Weight
Lightweight, varies by size

Size
600 mm x 200 mm x (100/150/200/225/250 mm)

Shape
Rectangular

Durability
High resistance to pests, rot, and mold

Packing Type
Bundled/Palletized or as per requirements

Installation Time
Faster than conventional bricks due to large size and lightweight

Lifespan
Greater than 50 years with proper maintenance

Standards Followed
IS 2185 (Part 3): 1984 or as per IS 5482

Seismic Resistance
Superior due to lightweight

Fire Resistance
Up to 4 hours as per thickness

Adhesive Requirement
Thin bed mortar recommended

Sound Insulation
High, excellent acoustic performance

Storage
Store in dry conditions on a flat surface

Manufacturing Tolerance
+/- 1.5 mm

Surface Finish
Smooth and uniform

Workability
Can be cut, drilled, nailed, and milled easily

Eco-Friendliness
Environmentally friendly, no toxic substances, recyclable

Autoclaved Aerated Concrete Blocks Trade Information

Payment Terms
Cash in Advance (CID)

Supply Ability
1000 Per Month

Delivery Time
7-10 Days

Main Domestic Market
All India

About Autoclaved Aerated Concrete Blocks

AAC blocks are widely used in the construction of apartments and other residential projects, as well as industrial and commercial buildings such as hotels, offices, hospitals, and schools.

Apartments & Residential Projects
Commercial Buildings
Hotels & Offices
Hospitals & Schools
Industrial Facilities
Interior & Exterior Walls
High-Rise Structures

Technical Advantages of AAC Blocks

Structural Savings : Lightweight blocks reduce dead load and steel use. Precision shapes minimize plaster and lower overall cost.
High Strength: High-pressure steam curing delivers superior strengthto-weight ratio exceeding Indian building code standards.
Higher Flexibility: Easily cut, grooved, and shaped on site for faster installation and adaptable designs.
Faster Construction: Reduced weight and quick setting accelerate project schedules.
Green Building & Energy Saving: Supports LEED/GRIHA credits, lowers manufacturing energy, transport fuel, water use, and improves operational efficiency.
Installation Benefits: Easy cutting, drilling and conduiting with thin mortar joints for rapid installation.
Fire Resistant :Cellular structure withstands temperatures up to 1500 deg C and resists fire for 4-5 hours without toxic fumes.
Pest Resistant: Inorganic composition prevents termite and insect infestation.
High Acoustic Insulation: STC-44 rating provides 45-49 dB sound attenuation for improved indoor comfort.

AAC Block Technical Specifications

As per IS:2185 Part 3 (1984)

Parameter	Units	Value
Density (Oven Dry)	Kg/m2	551-650
Compressive Strength	MPa	4 N/mm2
Size Tolerance	mm	Length -/+ 5 Height & Width -/+ 3
Modulus of Elasticity	Mps	2040
Water Absorption	Kg/m2xh0.5	4-6
Thermal Conductivity	W/mk	0.16
Thermal Resistance	k/w	0.58
Drying Shrinkage	mm/m max	0.20 (0.04%)
Fire Resistance	Hrs	4 (for 200 mm wall)

Block Dimensions & Coverage

Dimension (LxHxB mm)	Blocks /m3	Wall Area /m3 (ft2)
600x200x10	83.33	107.6
600x200x125	66.66	86
600x200x15	55.55	71.7
600x200x200	41.66	53.8
600x200x230	37.00	47.8

Walling Material Comparison

PROPERTY	RED BRICK	CONCRETE BLOCK	AAC BLOCK
Material Composition	Top Soil	Cement + Water + Sand and Gravel.	Fly Ash + Gypsum + Lime + Cement + Aluminium powder
Water Absorption	High	Average
Pest & Termite	High	None	None
Dry Density	1800-2000 kg/m3	2500 kg/m3	550-650 kg/m3
Earth Quake Resistance	Low	Minimal (1-3%)	Highest in the category
Wastage due to Breakages	High 10 to 12%	Minimal (1-3%)	Minimal (1-3%)
Fire Resistance (6" wall)	2 hours	3 hours	4 hours.
Energy Saving	Low	Average	High (30% less electricity consumption on HVAC)
Thermal Conductivity (K value)	0.81 W/m K	2W/m deg K	0.16 W/m'K

Application of AAC Blocks

High-Rise/ Multi-Storey Buildings
Residential Housing
Hospitals & Institutional Buildings
Industrial Structures & Warehouses
Commercial Complexes & Offices

Superior Fire and Sound Insulation

AAC blocks offer up to 4 hours of fire resistance, depending on their thickness, making them a safe choice for a variety of structures. Additionally, their high porosity and advanced acoustic properties ensure remarkable sound insulation, contributing to quieter indoor environments. These qualities make the blocks particularly suitable for firewalls and sound-sensitive applications in residential, commercial, and institutional buildings.

Eco-Friendly and Durable Construction

Manufactured using environmentally friendly processes, AAC blocks do not emit toxic substances and are fully recyclable. They have high resistance against pests, rot, and mold, contributing to a long-lasting and healthy building envelope. Their lightweight nature reduces dead load, which improves seismic resistance and eases transportation and installation, offering practical and sustainable construction solutions.

Ease of Use and Versatility

AAC blocks are designed for rapid installation due to their large size and lightweight characteristics. They can be cut, drilled, nailed, and milled with standard tools, enabling customized fit for a variety of building requirements. Appropriate for both internal and external use, these blocks provide a smooth finish and maintain manufacturing tolerances within +/- 1.5 mm, ensuring consistent quality on every project.

FAQ's of Autoclaved Aerated Concrete Blocks:

Q: How are Autoclaved Aerated Concrete (AAC) Blocks installed?

A: AAC blocks are typically laid using a thin bed mortar rather than traditional cement mortar, which speeds up installation. Their lightweight and large size further facilitate rapid construction, making them faster and easier to install compared to conventional bricks.

Q: What applications are AAC blocks most suitable for?

A: AAC blocks are ideal for internal and external walls, partitions, infill panels, firewalls, and locations requiring sound insulation. Their high fire resistance and acoustic performance make them popular in both residential and commercial projects.

Q: When is it necessary to choose AAC blocks over traditional bricks?

A: AAC blocks should be chosen when superior fire and sound insulation, environmental responsibility, lightweight construction, and quick installation are priorities. They are especially advantageous in seismic zones and for projects seeking energy efficiency.

Q: Where should AAC blocks be stored before use?

A: It is recommended to store AAC blocks in dry conditions on a flat surface, typically in bundled or palletized form. Proper storage helps maintain the blocks' strength and integrity prior to installation.

Q: What benefits do AAC blocks provide in terms of durability?

A: AAC blocks are highly durable, having strong resistance to pests, rot, and mold. With a lifespan greater than 50 years when maintained properly, they offer a long-term solution for building projects.

Q: How eco-friendly are AAC blocks during and after construction?

A: AAC blocks are made using eco-friendly processes without releasing toxic substances. They are recyclable and have a low carbon footprint, contributing to sustainable building practices throughout their lifespan.

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