AAC BLOCKS
Aerated autoclaved is a technology developed in the mid-1920 by the swedes. The aerating is caused by a reaction of mix of various materials mainly consisting of silica (through fly-ash}, quicklime, cement and others. Fly Ash Block (Aerated Autoclaved) consist of around 80% air the aerated material is processed through autoclaving which entails high pressurized curing of aerated materials formed in cellular shapes, which are known as AAC elements. These elements can be further classified into blocks, wall I floor I roof panels and lintels. The fly Ash Blocks (Aerated Autoclaved) are used as a substitute for the conventional building masonry and have been widely accepted globally because of their beneficial properties such as light weight, thermal and sound insulation mould resistance and other benefits which ease the process of construction. Not only that, but these precast building elements are environment friendly as their processing hardly causes pollution and also boasts the consumption of fly ash which is a waste. Fly Ash Blocks (Aerated Autoclaved) is being used throughout industrial, commercial and residential structures for different applications such as external and internal walls, roofs, other partitions and divisions.
BRICKSTECH AUTOCLAVE AERATED CONCRETE BLOCKS
| Sr.No. | No. Of Blocks per m3 | |||||
|---|---|---|---|---|---|---|
| Size of AAC Blocks in mm | Size of | Volume | No.of Blocks/m3 | |||
| Length | Height | Width | Width Size in inches | m3 | Cum | |
| 1 | 625 | 240 | 100 | 4" | 0.015 | 66.66 |
| 2 | 625 | 240 | 125 | 5" | 0.01875 | 53.33 |
| 3 | 625 | 240 | 150 | 6" | 0.0225 | 44.44 |
| 4 | 625 | 240 | 200 | 8" | 0.03 | 33.33 |
| 5 | 625 | 240 | 230 | 9" | 0.0345 | 28.99 |
| 6 | 625 | 240 | 300 | 12" | 0.045 | 22.22 |
TECHNICAL SPECIFICATION
| Dry Density | 550-600 kg I m3 |
| Compressive Strength | 35-40 kg I cm (As per IS : 21851) 3 - N I mm2 |
| Thermal Conductivity | 0.15 - 0.18 W/m-k |
| Sound Absorption | upto 45 dB for 200 mm thick wall |
| Drying Shrinkage | 0.04% |
| Water Absorption | 12 - 15 % |
| Fire Resistance | 2 - 6 Hour depending on thickness |
COMPARISON CHART
| Parameter | AAC Block | Cement Brick | Clay Bricks | |
|---|---|---|---|---|
| 1 | Size | (600*200*75-300) mm | (400*200*100-200) mm | (230*115*75) mm |
| 2 | Variation in Dimensions | + / -1mm | + / - 3 mm | + / - 5 mm |
| 3 | Compressive Strength | 35-40 kg/cm (As per IS : 2185) | 40-50 kg/cm (As per IS : 2185) | 25-30 kg/cm (As per IS :2185) |
| 4 | Ory Density | 550 - 600 kg/m (Over dry) | 1800 kg/m3 | 1950 kg/m3 |
| 5 | Fire Resistance | 4-6 Hour depending on thickness | 4 Hours | 2 Hours |
| 6 | Sound Reduction Index (dB) | 60 for 200 mm thick wall | 30 for 200 mm thick wall | 40 for 230 mm thick wall |
| 7 | Thermal Conductivity W/(K-m) | 0.16 | 0.51 | 0.81 |
| 8 | Colour Availability | greyish white | grey | red |
