The History and Future of AAC Blocks

AAC Blocks, also known as Autoclaved Aerated Concrete Blocks, are some of the most consumed building materials in the world. For many users – be it commercial construction, private homes or public buildings – AAC Block is an extremely versatile and cost-effective solution for a wide range of applications. It offers a high degree of value to customers, due to its cost-effective construction and technical performance.

The world’s most consumed building materials are currently made using Autoclaved Aerated Concrete (AAC). What you might not know though is that this was an accidental discovery!

Johan Axel Eriksson - AAC blocks Inventor

Back in the 1920s, when the world was still recovering from the effects of the First World War and the steady supply of wood was scarce, a Swedish Architect, Dr. Johan Axel Eriksson, when exploring the properties of aerated concrete, accidentally discovered a softer, lighter and more flexible material that could be used as a substitute for wood.

Image Source: Wikidata

This discovery changed everything.

Due to a lack of time, Dr. Johan Axel Eriksson changed the course of the curing procedure by putting one of his samples of burnt shale limestone, water, and aluminium powder in the lab autoclave. The porous material lasted the overnight autoclaving, and the cured concrete that was produced had a significantly higher strength and unique, more robust crystalline composition. The silica and lime components had combined under the high heat and pressure of the steam curing process to create a calcium silicate hydrate crystal that resembled tobermorite.

The Introduction of AAC Blocks

AAC blocks are types of green building materials that have been around for over 70 years. They can be used extensively in residential and non-residential constructions. These building materials are produced from natural materials such as sand (or fly ash), cement, lime, gypsum, aluminium powder, and water.

This mixture creates an aerated structure that provides insulation, fire protection and soundproofing, all in one product. This material is also a popular building material. It has gained worldwide market share compared to conventional materials because it offers superior characteristics.

AAC blocks are used to construct inner leaves of cavity walls and partitions, internal and external firewalls, and load-bearing designs for homes, businesses and industry.

Features of AAC Blocks

  • Autoclaved aerated concrete blocks are environmentally friendly and use less construction material, resulting in reduced costs and lower carbon emissions.
  • These blocks are more earthquake-resistant and fire-resistant than mud blocks making those ideal solutions for school buildings.
  • They have superior air-sealing properties resulting in great sound insulation.
  • Autoclaved aerated concrete blocks are stronger and water-proof, so less energy is wasted on water.
  • Water is saved because of the low water absorption rate of these blocks.
  • Savings in construction materials result in cost reduction and there is also a reduction of construction waste that is harmful to the environment.

The Future of AAC Blocks

The invention of the Indian AAC blocks market in the early 20th century has led to the rise of the Indian building construction industry. The process of manufacturing AAC blocks is eco-friendly and affordable and most importantly, it can be installed using simple tools.

AAC blocks have undergone significant development over the years and now they are being used as a green building construction material. The Indian AAC blocks market is anticipated to register a growth of INR 11095 crores at a CAGR of 14.3 per cent during the forecast period, 2020-2027.


If you’re familiar with the benefits of using AAC blocks in your construction projects, then don’t hesitate to contact NXTBloc – the best manufacturer of AAC blocks in India. The properties of this product will undoubtedly make it a great choice for any home or business that wants to build a modern and sustainable structure.

Suppose you’re committed to giving your customers quality products that are better for their environment. In that case, you’ll definitely want to get in touch with Big Bloc Construction Pvt. Ltd. – India’s leading manufacturer of eco-friendly AAC blocks.

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