AAC Blocks
Aerated Auto-claved Block
Fly Ash Blocks (Aerated Auto-claved) are used as a substitute against conventional building masonry such as red clay bricks and have been widely accepted globally because of their beneficial properties. The aerating is caused by a reaction of a mix of various materials mainly consisting of silica (through fly-ash), quicklime, cement and others. Fly ash blocks (Aerated Auto-claved) consist of around 80% air, this aerated material is processed through autoclaving which entails high pressurized curing of aerated materials formed in cellular shapes.
  • Key features and benefits
  • Bigger in size
  • Thermal insulation
  • Fire resistant
  • Better compressive strength
  • Rough surface
  • Technical assistance
Technical Specifications
Particulars Units Values
Size (Length x Height) mm 650/625/600 x 250/240/200
Size (Width) mm 75, 100, 125, 150, 200, 225, 250, 300
Size Tolerence (Maximum) mm ± 1 (width)
Compressive Strength M/mm2 G1 : ≥ 4.0 | G2 : ≥ 3.3
Oven Dry Density Kg/m3 560-640
Fire Resistance Hours 4 (for 150 mm thick wall without plaster)
Thermal Conductivity (K Value) W/mk 0.16-0.21
Sound Reduction dB 37-42
Modulus of Elasticity Mpa 2040
Thermal Resistance (R Value) m2 K/W 0.95 (200 mm Width @ K = 0.21W/mK)
Thermal Conductance (U Value) W/m2K 1.05 (200 mm Width) @ K = 0.21W/mK
Drying Shrinkage (Maximum) % 0.04
Sound Transmission Class Rating dB 44
Capillary Water Absorption gm/dm2 180
Preparation & application guidelines

Stack on dry and even surface to avoid damage and contact with moisture.

Mortar for Masonry

Thin bed adhesive (premxed) (ASTM C 1660-09)

Wetting of block before application

Dip in water and lift immediately

Cutting of block

Use tool like hacksaw or rotary cutter

Mortar thickness

(i) Conventional: 10-12 mm
(ii) Pre-mix Thin Bed: 2-3 mm

Bond pattern

Coping beam

Coping beam with 2 nos 8 mm reinforcement after 1.2 mts. height

Lintel support

Lintel support on full block

Beam & column junctions

It should cover 6" on both the surfaces (internal & external)

Brands we deal in:
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Mahalaxmi Logo Watermark
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  • Get in touch
  • Plot No. B-9/3, Opp. Ordnance Factory,
  • Nr. Reliance Petrol Pump,
  • Ambernath (W), Thane (MH), India.
  •  +91 88885 05500

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