1. What is CLC?
CLC is called as Cellular Light Weight Concrete and it is also called as Foam Concrete. Cellular Light Weight Concrete (CLC) is a version of lightweight concrete that is produced like normal concrete under ambient conditions. It is produced by initially making slurry of Cement, Sand (optional), Fly-Ash & Water, which is further mixed with the addition of pre-formed stable foam. The Concrete is pumped into assembled moulds of blocks. The foam imparts free flowing characteristics to this slurry due to ball bearing effect of foam bubbles enabling it to easily flow into all corners and compact by itself in the moulds/forms without requiring any kind of vibration or compaction. Good Curing gives strength and dimensional stability to Bricks. Bricks are cured either by Water Curing or Steam Curing procedure.
2. What are the Raw Materials?
Raw Materials for making CLC Bricks / Blocks would be Cement, Fly-Ash / Sand, Foam, Water & Lime (If-Needed).
3. Is the Foaming Agent Available continuously and where should we get from?
Foaming Agent is continuously available from Nanolite in whatever quantities required.
4. What about Density?
Densities range of CLC would be between 400 – 1800 kg/m3 which are used for various applications.
5. What about Compressive Strength?
As per IS 2185 Part IV, Compressive strength Chart is as follows:
||Compressive Strength (n/mm2)
||Water Absorption (%)
6. What about Curing?
Curing of the Bricks / Blocks can be done by either Water Curing for 2 to 3 weeks or by Steam Curing for 8 Hours.
7. Steam Curing Plant
These Plants are generally suitable for Higher Production Capacities and the advantages with this system will be Faster Curing, Less Labor, Less Production Cost, Mass / Maximum Production
8. Water Curing Plant
These Plants are generally suitable for Less Production Capacities and are best suitable for Start-Up Companies, Brick / Tiles Manufacturers, Small Builders, Entrepreneurs as the investment is very less.
9. Sizes & Number of Bricks per m3 with Weights
|Size (in inches)
||Size (in mm)
||No of Bricks / m3
|24 * 8 * 4
||600 * 200 * 100
||9.5 – 10
|24 * 8 * 6
||600 * 200 * 150
||14.5 – 15
|24 * 8 * 8
||600 * 200 * 200
||19 – 19.5
|24 * 8 * 9
||600 * 200 * 225
||22 – 22.5
1. When was AAC first developed?
AAC was developed in 1924 by a Swedish architect, who was looking for an alternate building material with properties similar to that of wood – good thermal insulation, solid structure and easy to work with – but without the disadvantage of combustibility, decay and termite damage.
2. What are AAC blocks/panels made of?
AAC blocks and panels are manufactured using fly ash mixed with cement, lime, water and an aerating agent. The resultant building material, comprising millions of tiny air pores, is set and cut into blocks and panels of varying sizes.
3. What are the advantages of using AAC?
1. Eco-friendly & Sustainable
- Makes productive use of recycled industrial waste (fly ash).
- Non-polluting manufacturing process – the only by-product is steam.
- Made of non-toxic ingredients.
- Does not exude gases.
- Total energy consumption for producing AAC is less than ½ of what it takes to produce other building material.
- 3-4 times lighter than traditional bricks, therefore, easier and cheaper to transport.
- A AAC block weighs approximately 50% less than a standard CMU block.
- A AAC panel weighs approximately 30% of standard cast-in-plAAC concrete.
- Usage reduces overall dead load of a building, thereby allowing construction of taller buildings.
3. Thermally Insulated & Energy Efficient
- Tiny air pores and thermal mass of blocks provide excellent thermal insulation, thus reducing heating and air conditioning costs of a building.
4. Fire Resistant
- Non-combustible and fire resistant up to 1600° C.
- Can withstand up to 6 hours of direct exposure.
5. Acoustic Performance
- Superior sound absorption qualities due to porous structure of blocks.
- Offers sound attenuation of about 42 dB, blocking out all major sounds and disturbances.
- Ideal for schools, hospitals, hotels, offices, multi-family housing and other structures that require acoustic insulation.
6. Easy Workability and Design Flexibility
- Blocks can be easily cut, drilled, nailed, milled and grooved to fit individual requirements.
- Available in custom sizes.
- Simplifies hydro-sanitary and electrical installations, such as pipes or ducts, which can be installed after the main construction is complete.
7. Seismic Resistant
- Lightweight blocks reduce mass of a structure, thus decreasing the impact of an earthquake on a building.
- Non-combustible nature provides an advantage against fires, which commonly accompany earthquakes.
- Available in exact sizes.
- Results in smooth walls with perfect contact between different elements.
- Reduces cement and steel usage.
9. Termite/Pest Resistant
- Due to structure of blocks, AAC cannot be damaged or infested by termites and other pests.
10. Low Maintenance
- Reduces operating cost by 30% to 40%.
- Reduces overall construction cost by 2.5% as it requires less jointing and reduces need for cement and steel.
- High-insulation blocks save up to 30% in energy costs.
- Variety in sizes of blocks helps increase carpet area.
- Wall painting and plastering last longer as almost nil efflorescence affects AAC. This translates into lower maintenance costs.
11. Faster Construction
- Reduces construction time by 20%.
- Different sizes of blocks help reduce the number of joints in wall masonry.
- Lighter blocks make construction easier and faster.
- Easy to install. Sets and hardens quickly