How To Make AAC Blocks?

Autoclaved Aerated Concrete (AAC) blocks are a well known building material that has acquired huge consideration as of late. These blocks are referred to for their novel properties like high strength, low weight, and superb warm protection. AAC blocks are made utilizing an exceptional creation process that includes a mix of natural substances and state of the art innovation.

The manufacturing of AAC blocks can be summarized as following. AAC bricks are produced from a mixture of cement, lime, sand, gypsum, and aluminum powder combined with water. This mixture is then put into a mold and left to dry for a set amount of time. After curing, the pieces are trimmed to size and form before being autoclaved to improve their properties.

AAC block production requires precision and expertise to guarantee the finished product fulfills the necessary standards. To guarantee that the final product is of good quality, proper quality control measures are implemented throughout the manufacturing process.

The importance of AAC blocks cannot be overstated. They are a sustainable building material that can reduce the overall carbon footprint of a building. Besides, they are easy to handle and install, and provide excellent thermal insulation. More and more AAC block plant has improved the production technology. In this article, we will take a closer look at the production process of AAC blocks. Let’s dive into with the raw materials, the manufacturing process, and the importance of quality control.

Raw Materials for Making AAC Blocks

Using the right mix of raw materials in the right proportions is critical to producing high-quality aerated concrete blocks. The raw materials used to make AAC blocks are:

main raw materials when making aac blocks


Cement is the primary binder used in manufacturing AAC blocks. The type of cement used to manufacture AAC blocks is typically Portland cement.


Lime is used to improve the wokability of slurries used to make AAC blocks. It also contributes to the strength and durability of the final product.


Sand is a key ingredient in AAC blocks as it provides the necssary structure and density for the blocks. It is important to use sand that is free of contaminants such as clay or silt.


Gypsum is added to the mixture to control the setting time of the slurry. It also increase the strength and durability of the final product.

Aluminum powder

By using aluminum powder as a foarming agent and creating air pockets in the slurry, we have achieved weight reduction and excellent heat insulation.


Water is an essential element in the production of aerated concrete blocks. The raw materials are mixed to create a slurry that is poured into the mold.

Using high-quality raw materials is key to ensuring that the final product meets the required standards. Raw materials must be sourced from reputable suppliers and checked for quality before use.  

Production Process of AAC Blocks

The production process of AAC blocks involves the following steps:

aac blocks production process
  • Mixing of Raw Materials: The raw materials, including cement, lime, sand, gypsum, aluminum powder, and water, are mixed in a concrete mixer to create a slurry.
  • Casting and Molding: The slurry is poured into molds, which are then placed on a conveyor belt and moved to a cutting machine. The molds are designed to create the desired shape and size of the blocks.
  • Curing: After molding, the blocks are left to cure in a warm and humid environment for several hours. During this stage, the slurry hardens and forms a solid structure.
  • Autoclaving: Once the blocks have cured, they are placed in an autoclave, where they are exposed to high-pressure steam. The steam causes a chemical reaction within the block, resulting in the formation of air pockets that give the blocks their lightweight and insulating properties.
  • Cutting: After autoclaving, the blocks are moved to a cutting machine, where they are sliced into the desired size.
  • Packing: The finished blocks are packed and shipped to the construction site.

The production process of AAC blocks is highly automated, which ensures consistency and quality of the final product. The blocks are manufactured in various sizes and shapes, making them suitable for a wide range of construction applications.

Quality Control of AAC Blocks

The following quality control procedures are used to assure the quality of aerated concrete blocks:

Raw material inspection: Before the mixing process, raw materials are inspected for quality and uniformity. Cement, lime, sand, gypsum, aluminum powder, and water are all tested to verify they fulfill the standards.

Quality control during mixing and injection: Slurry consistency and quality are checked during the mixing and pouring processes to ensure blocks have the right compressive strength and density. Molds used for casting are also examined to ensure they are clean and debris-free.

Testing of Final Blocks: When the blocks are manufactured, samples from each batch are taken for testing. Compressive strength, density, and water absorption are all measured on the blocks. These tests guarantee that the blocks fulfill the construction material specifications.

Quality control methods are crucial in assuring AAC blocks’ durability and lifespan. Adequate testing and monitoring of raw materials, as well as the mixing and casting processes, aid in ensuring that the completed product is of good quality and fulfills the essential building material requirements.

Advantages of AAC Blocks

AAC blocks have a number of benefits over conventional construction materials. Among the primary benefits are:

High Strength and Durability

AAC blocks have high compressive strength, making them sturdy and long-lasting. They can handle enormous weights and are fire, insect, and other environmental problems resistant.


AAC blocks are lighter than traditional construction materials. This makes them simple to carry and handle, potentially reducing building time and personnel costs.

Excellent Thermal Insulation Properties

AAC blocks have excellent thermal insulation properties, which can help to reduce energy consumption and lower heating and cooling costs.

Eco-Friendly and Sustainable

AAC blocks are made from natural materials and are environmentally friendly. They are also recyclable and can be reused in other construction projects.

Easy to Install and Use

AAC blocks are easy to install and use, which makes them ideal for both residential and commercial construction projects. They can be cut, drilled, and shaped to fit any design requirements.

Overall, the advantages of AAC blocks make them a popular choice for construction projects around the world. Their strength, durability, and eco-friendliness make them an ideal building material for sustainable construction.


In conclusion, AAC blocks are a popular and innovative building material with various benefits over traditional materials. Mixing raw ingredients, casting and molding, curing, autoclaving, cutting, and packaging are all part of the manufacturing process. Quality control is essential to ensuring that the finished product satisfies the required standards, and testing is performed at each stage of the process. High strength and durability, low weight, good thermal insulating capabilities, eco-friendliness, and simplicity of installation are all advantages of AAC blocks. Overall, AAC blocks are a promising alternative for sustainable building, but further study is needed to fully realize their potential. AAC block producers can guarantee that their products fulfill the appropriate requirements and provide the benefits that consumers expect by keeping stringent quality control throughout the manufacturing process.