Biltech

Build Faster and Greener with Autoclaved Aerated Concrete Blocks

What are AAC Blocks?

AAC blocks, also known as Autoclaved Aerated Concrete blocks, are lightweight masonry blocks used in the construction of walls, floors, and roofs. AAC blocks are made up of  Fly ash, , lime, gypsum, cement, water, and aluminium powder, which are mixed and then moulded into blocks. The blocks are cured in a high-pressure chamber, or autoclave, which uses steam to create a highly porous material with excellent thermal insulation and fire-retardant properties. AAC blocks are not only lightweight and easy to install, but they are also highly energy efficient and have a high strength-to-weight ratio. Additionally, AAC blocks have a high thermal resistance and good sound insulation, making them an ideal material for use in buildings. Due to their low embodied energy and low environmental impact, AAC blocks are becoming a popular choice for green building projects.

Types of AAC Blocks Available

Autoclaved Aerated concrete blocks are classified based on the parameters as given below: 

a) Compressive strength grade - Grade 1 and Grade 2 

b) Density in Oven dry condition (kg/m3) - 451-550, 551-650, 651-750, 751-850, 851-1000 

c) Nominal sizes – 

• Length - 400 mm, 500 mm, 600 mm 

• Width - 200 mm, 250 mm, 300 mm 

• Thickness - 100 mm, 150 mm, 200 mm, 250 mm

d) Shapes of blocks – Stretcher, corner, double corner or pier, jamb, header, bull nose, partition block and concrete floor units.

AAC blocks are a versatile and cost-effective building material, and they are available in a variety of types and sizes to suit any building project. No matter what type of AAC block you need, there is sure to be an option that will meet your needs.

Benefits of using AAC Blocks

1.Lightweight: AAC blocks are much lighter than traditional concrete blocks, making them easier to transport and install. This helps to reduce labour costs and shorten construction time.

2.Fire Resistant: AAC blocks have a lower thermal conductivity than conventional masonry materials, making them more fire resistant. Additionally, AAC blocks are not combustible and are classified as a Class A fire-resistant material.

3.Thermal Insulation: AAC blocks offer excellent thermal insulation, reducing energy costs and making buildings more energy efficient.

4.Acoustic Insulation: AAC blocks offer superior acoustic insulation, helping to reduce noise pollution.

5.Ease of Use: AAC blocks are easy to cut and shape, making them a great choice for builders and DIYers.

Overall, AAC blocks are a great, versatile building material that offer many advantages. Their light weight, fire-resistance, thermal insulation, and acoustic insulation properties make them a great choice for any construction project. Additionally, their low cost and ease of use make them attractive to builders and DIYers alike.

Applications of AAC Blocks

AAC blocks are often used in the construction of walls, foundations, and external façades.. AAC blocks are also fire-resistant, which makes them a preferred choice in fire-prone areas. They are also a popular choice for basement construction and retaining walls, as they offer superior strength and water-resistance.

AAC blocks are often used for interior walls as well. They are light, easy to install and offer excellent soundproofing properties. They are also resistant to mold and mildew, making them a good choice for bathrooms and kitchens. 

AAC blocks are also becoming increasingly popular in the industrial sector due to their resistance to extreme temperatures and superior fire resistance. They are often used in factories and industrial buildings to provide a safe, durable, and fire-resistant structure. AAC blocks are also increasingly being used for cold storage and food processing facilities due to their ability to withstand extreme temperatures.

Overall, AAC blocks are an increasingly popular choice in the construction industry due to their many applications and advantages. 

Installation and Maintenance of AAC Blocks

AAC (Autoclaved Aerated Concrete) blocks are an innovative building material with numerous benefits compared to traditional masonry blocks. However, proper installation and maintenance of AAC blocks is essential in order to maximize their life span and ensure their optimum performance.

The installation of AAC blocks is relatively straightforward but must be carried out according to the manufacturer's instructions in order to ensure that the blocks are secure and that the structure is sound. Before installation, the blocks must be inspected for any damage or defects. The blocks should then be laid on a level and well-prepared base, with adequate space between each block to allow for expansion and contraction. The blocks should also be bonded together with a suitable adhesive and securely fixed in place.

Once the AAC blocks have been installed, it is important to ensure that they are properly maintained. This includes regularly inspecting them for any signs of damage or deterioration, as well as ensuring that any joints remain properly sealed. Proper cleaning and sealing methods should also be employed to maintain the blocks and prevent water and mould damage.

In order to extend the life of the AAC blocks, they should be covered with a protective coating or sealant prior to installation. This will help to prevent weathering and staining and will help to maintain the structure’s aesthetic appeal. Regular maintenance and inspection of the blocks should also be carried out to detect any problems or defects early on.

Overall, proper installation and ongoing maintenance of AAC blocks is essential to ensure that the blocks are secure and in good condition. By following these guidelines, the lifespan of the AAC blocks can be significantly increased and their performance optimized.

AAC Blocks FAQs –

1. What is Autoclaved Aerated Concrete (AAC) block?

Autoclaved Aerated Concrete (AAC) block is a lightweight, precast building material composed of silica-rich materials such as sand, fly ash, and cement. It is a porous material with a cellular structure that can be cut, drilled, and shaped to meet various construction needs. AAC blocks are strong, durable, and resistant to fire, heat, and moisture. They are also easy to install and require minimal maintenance. AAC blocks are an ideal choice for constructing walls, foundations, flooring, and other structural components.

2. What are the benefits of using Autoclaved Aerated Concrete (AAC) blocks?

Autoclaved Aerated Concrete (AAC) blocks offer many benefits to builders and users. They are lightweight, yet strong and durable, providing superior thermal insulation and soundproofing. They can be produced with a variety of colours and shapes, and are easy to install. AAC blocks are also fire and moisture resistant, making them an ideal choice for constructing exterior walls and foundations. Additionally, AAC blocks require minimal maintenance, making them a cost-effective building material.

3. How are Autoclaved Aerated Concrete (AAC) blocks made?

Autoclaved Aerated Concrete (AAC) blocks are created by mixing silica-rich materials such as , fly ash, Lime, Gypsum and cement, with a foaming agent. The mixture is then poured into a mould and left to harden. After hardening, the AAC blocks are then placed in a large, pressurized chamber and heated to a high temperature for a predetermined period. This process, known as autoclaving, helps to strengthen the blocks and make them resistant to fire, heat, and moisture.

4. Is Autoclaved Aerated Concrete (AAC) block environmentally friendly?

Yes, Autoclaved Aerated Concrete (AAC) block is an environmentally friendly building material. AAC blocks are made of natural materials such as silica, sand, and cement and are non-toxic, making them safe for use in buildings. Additionally, AAC blocks are energy efficient and require minimal maintenance, which helps to reduce energy consumption and minimize waste.

5. Can Autoclaved Aerated Concrete (AAC) blocks be used for exterior walls?

Yes, Autoclaved Aerated Concrete (AAC) blocks can be used for exterior walls. AAC blocks are strong, durable, and resistant to fire, heat, and moisture, making them an ideal choice for constructing exterior walls and foundations. Additionally, AAC blocks are lightweight, yet strong, and provide superior thermal insulation, making them an energy-efficient option for constructing exterior walls.

6. How long do Autoclaved Aerated Concrete (AAC) blocks last?

Autoclaved Aerated Concrete (AAC) blocks are designed for long-term use and can last for decades with proper care and maintenance. AAC blocks can withstand extreme temperatures, moisture, and chemical exposure, making them an ideal choice for constructions that need to stand the test of time. Additionally, AAC blocks are easy to install and require minimal maintenance, making them a cost-effective and long-lasting building material.