Modcrete  AAC Blox HD

Higher Strength

Compressive strength varies from 8 N/mm2 to 9 N/mm2, which is almost 15% better than red clay bricks and at the same time, weighing 60% of red bricks. One of the best walling product with unmatched strength to weight ratio.

Light Weight

AAC blocks have a density range of 750 kg/cum to 950 kg/cum. This results in total cost savings as well as a faster construction period.

Cost Effective

Being lightweight, AAC drastically reduces the dead weight of building, resulting into reduction in steel (up to 20%) and cement (up to 25%) structural cost saving. Lighter product reduces transport costs as well being 15 times the size of a clay brick, AAC wall construction involves 1/15 of joints, thus an overall mortar saving up to 66%

Sound Proof

AAC walls have an excellent sound transmission class (STC) rating of 44. Which results to virtually soundproof interiors, which in turn provides Excellent Acoustic Performance.

Superior Durability

AAC blocks are highly durable and can bear adverse weather conditions. Furthermore, they are earthquake resistant. Being ultra-light weight helps AAC be long lasting. Regions of high seismic activity like Japan exclusively use AAC. As it has proven to withstand wind loads of category 5 tropical storms.

Fire Resistant

Best in class fire rating of 4 hours. The melting point of AAC is over 1600 celcius. more than twice the typical temperature in a building fire of 650 celcius.

Accurate Dimension

Its automatic manufacturing process gives AAC an exceptional dimensional accuracy & smooth surface, eliminating need of three-coat plaster walls and allowing for a final 6mm skim coat (putty/pop). Our AAC provides greater Design Versatility & Flexibility.

Thermal Insulation

It has highest thermal rating in the industry: R30! Thus, it provides well insulated interiors, keeping out warm air in summer and cold air in winters. AAC reduces Air conditioning cost upto 30%.


AAC blocks can be sawed, drilled, just like wood and hence they prove to be one of the most easy to use construction materials’. It facilitates easier fitting of plumbing, electrical and also wall


Eco Friendly

AAC is 100% Green Building Material & is a walling material of choice in LEED certified buildings. AAC is most energy & resource efficient in the sense that it uses least amount of energy & material per m3 of product. Unlike brick manufacturing process which uses previous top-layer agricultural soil, AAC uses FlyAsh (65% of its weight).

Termite & Insect Resistant

Solid wall construction and finishes which bond to the wall have no cavities for insects, termites or rodents to dwell in. This also eliminates entry points. Termites and ants do not eat or nest in AAC. Cannot be penetrated by termites or insects. Reduces need for pest control. Offers maximum protection against damage.

Faster Construction

AAC Blocks helps reduce the construction time by upto 20%. Different sizes of blocks help reduce the number of joints in wall masonry. Easy to install. It sets and hardens very quickly. Lighter blocks make construction easier and faster.

Modcrete AAC Block HD

HD AAC blocks, a stronger yet light in weight substitute of the conventional red brick. Has twice strength than ModCrete AAC Blox. This product has been specially designed for the contracts wherein AAC blocks have been specified, but erroneously, the compressive strength has been written for red bricks. 

This product has been certified by Bureau of Standards (BIS) and a separate IS certification has been obtained by the company. The testing from an independent laboratory and BIS certification are as under :  


The size of AAC blocks are as under :-

Length 600 mm (23.6 in) & 625 mm (24.6in)
Height 200 mm (8 in), 240 mm (9.5 in) & 250 mm (10 in)
Width          100, 115, 125, 150, 200, 225, 250, 300mm (4, 41⁄2, 5, 6, 8, 9 10, 12 in)


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Density Oven Dry851-1000 kg/m3
Compressive strength8-10 N/mm2 (MPa)
Shear Strength0.8 N/m2
Thermal Conductivity 0.42 w/m^(0)K
Fire resistance 4 Hrs (for 200 mm wall)
Sound Transmission class rating 44db for 200 mm wall

We've Been here for over 20 years

We have an experience of more than 20 years in the fly ash industry, and are dedicated to be the driving force of change in the construction material market to make it more inclusive for the nature.