Autoclaved Aerated Concrete (AAC) blocks are lightweight and durable building products. First conceptualized and invented by Swedish architect and inventor Johan Axel Eriksson in 1924, AAC blocks are particularly known for their fire, heat, and sound-resistant properties. Air being the major constituent (almost 80-85% by volume), these building products are typically lightweight, weighing only a third of the more common red clay bricks.
They are lighter in weight (1/3rd weight of clay bricks), have bigger smart size. Easy to transport. Less handling[labour] cost, 2-3 times higher area coverage.
Highest thermal rating in the industry R30!. Its cellular structure provides well insulated interiors, keeping out warm air in summers and cold air in winters. AAC reduces air conditioning cost upto 30%. With HIGHER ISOLATIVE PROPERTY.
Autoclaved Aerated Concrete (AAC) Block consist of the inorganic material in its constitution that helps preventing/avoiding termites, damages or losses.
AAC block is very easy to handle, manipulate and use ordinary tools for cutting the wood such as the drill, band saws, etc. could be easily used to cut and align the AAC. This ultimately results in faster construction work as the installation time is significantly reduced due to fewer amounts of blocks and the masonry amount involved is also lowered resulting into reduced time-to-finish.
High pressure steam-curing autoclaving process gives AAC fly ash blocks unmatchable strength to weight ratio, higher than even M 150 concrete, and far exceeds the Indian Building code requirements.
AAC replaces clay bricks which are environmentally unsustainable. it contains 50 – 60 % of air, leading to light weight and low thermal conductivity. The characteristic of AAC is helpful in green housings and saves fertile lands and a solution for fly ash disposal.
Its unique cellular structure provides excellent fire rating. Due to this cellular structure AAC fly ash blocks do not disintegrate even in fire. It is best in class with a fire, rating of 4 hours. The melting point of AAC fly ash blocks are over 1600 degree celsius, more than twice the typical temperature 650 degree celsius, REQUIRED in building.
Microscopic structure of lightweight block does not allow for capillary action making it impervious to water. Its water barrier properties are further enhanced by adding silicone based additives.
The average cost saving for aggregate is about 36.27% and the average cost saving for cement is about 47.21%. It show that when AAC block is used instead of traditional bricks there is total cost saving in material for public building is about 46.3%.
With closed air pockets, AAC lightweight fly ash blocks can provide very good sound insulation/sound absorption with an STC(Sound Transmission Class) rating of 44. It can also be used as a sound barrier wall along busy roads. AAC wall has an excellent sound transmission class (STC) rating of 44. Result, virtually sound proof interiors.
Earthquake forces on structure are proportional to weight of the building, hence light weight blocks show excellent resistance to earthquake forces. Regions of high seismic activities like Japan exclusively use AAC Fly Ash Blocks. It has been proven to withstand wind loads of category 5 tropical storms.
With over many years of combined experience, we’ve got a well-seasoned team at the ecogreen.With over many years of combined experience, we’ve got a well-seasoned team at the ecogreen. With over many years of combined experience, we’ve got a well-seasoned team .
Property | Units | AAC BLOCKS |
DENSITY OVEN DRY | kg/m3 | 550-650 kg/m3 |
COMPRESSIVE STRENGTH | kg/m3 | 4N/mm2 (MPa) |
SHEAR STRENGTH | kg/m3 | 0.6 N/m2 |
MODULUS OF ELASTICITY | kg/m3 | 2040 Mpa |
COEFFICIENT OF THERMAL EXPANSION | kg/m3 | 8.1 x 10 -6 K -1 |
WATER ABSORPTION | kg/m3 | 8% |
THERMAL CONDUCTIVITY | kg/m3 | 0.16 w/moK |
THERMAL RESISTANCE | kg/m3 | 0.46 m2 - 0k/w |
DRYING SHRINKAGE | kg/m3 | 0.04% |
FIRE RESISTANCE | kg/m3 | 4 Hrs (for 200 mm wall) |
SOUND TRANSMISSION CLASS RATING | kg/m3 | 44db for 200 mm wall |
Widely Used in Commercial Buildings
Widely Used in Industrial Building
Widely used for Hotels Building
Used in Earthquake Alert Zone
Strong building of Educational Institution
Widely Used in Residential Buildings
Widely Used in Hospitals Construction
Widely Used in Hill Areas Construction
Widely Used in Godowns & Cold storages