Comparison between Clay Brick and AAC Block in Bangladesh
For efficient and sustainable construction, selecting the right materials is crucial for both producers and users. Clay bricks and AAC (Autoclaved Aerated Concrete) blocks are two popular options,
each with distinct features, costs, and benefits. Clay bricks, one of the oldest building materials, are made from natural clay and baked in kilns. They are strong, durable, and widely used in traditional
construction.
In contrast, AAC blocks are made from a blend of sand, cement, lime, water and aluminum powder. Combining lightness, modern aesthetics, and sustainability, they came as a contemporary replacement for traditional
materials. We will compare the two to help you make an informed choice for your construction projects. Call us at +8801841119091 for details!
AAC Blocks (Autoclaved Aerated Concrete Blocks) are crafted from sand, cement, lime, water, and a small amount of aluminum powder that
creates tiny air pockets. The mixture is poured into molds and steam-cured at high pressure, resulting in blocks that are durable, lightweight, energy-efficient, and eco-friendly.
First developed in the 1920s in Sweden
Made from natural and non-toxic materials
Excellent thermal insulation (5–8 °C)
60% lighter than traditional bricks
Can withstand extremely high fire temperatures for 4-5 hours
Energy-efficient from production to use
What are Clay bricks?
A red brick is a solid building block made from natural clay, shaped and baked at high temperatures. It has been used for centuries because it is strong, durable, and affordable at the same time.
Hazards of clay brick production:
Topsoil loss – Clay mining heavily destroys fertile agricultural land.
Air pollution – Emit CO₂, CO, SO₂, NO₂, NO₃, and dust particles during production.
Impact on climate – A major source of greenhouse gases and black carbon.
Respiratory diseases – Dust and smoke trigger asthma, bronchitis, and lung issues.
Toxic exposure – Heavy metals from fuels contaminate air and soil.
Poor thermal insulation – Red brick increases indoor heat and energy requirement for cooling.
Heavy structural load – This increases the structural load, leading to higher construction costs.
Key Differences between Clay Brick and AAC Block
In Bangladesh, choosing between red bricks and AAC (Autoclaved Aerated Concrete) blocks is crucial for construction projects. Understanding these key differences in
weight, insulation, cost, and environmental impact helps builders make informed decisions for sustainable and cost-effective construction. Here are the differences:
Parameter
Red Bricks
AAC Blocks
Composition
Clay
Sand, cement, lime, water, aluminum
Weight
1950 kg/m³
550–650 kg/m³ (lightweight)
Compressive Strength
4–7.5 N/mm²
3–4.5 N/mm²
Thermal Insulation
Poor, 0.81 W/m·K
Excellent, 0.24 W/m·K
Fire Resistance
2 hours
4–6 hours
Size
240 × 115 × 70 mm
600 × 200 × 75–300 mm
Mortar Joints
8-12mm
3-5mm
Construction Speed
Slower
3–3.5× faster
Cost
Cheap upfront, higher long-term
Higher upfront, but saves 15–25% in total cost
Environmental Impact
High energy and emissions
Low carbon footprint
Durability
60–80 years
Up to 100 years
Ease of Use
Difficult to cut
Can be cut, nailed, drilled easily
Look
Traditional
Modern chic
Clay Brick and AAC Block: Which is better for Bangladesh?
In Bangladesh, clay bricks have been used for over a thousand years, but production has damaged agricultural land. In 2024, the government issued a gazette banning new clay brick projects. Meanwhile, VAT-free sales
of AAC blocks encourage eco-friendly adoption. The PWD targets AAC to replace government construction materials, reaching 100% by 2031–32.
Other key benefits of AAC blocks:
Lightweight – Perfect for high-rise buildings or earthquake-prone areas.
Thermal insulation – Provides 5–8°C cooler indoor temperature, ideal for Bangladesh’s hot climate.
Energy saving – Saves energy for the producer, the constructor, and the residents.
Eco-friendly – For eco-conscious builders, AAC blocks are the greener choice.
Cost-effective – Significantly reduces overall construction and maintenance costs.
Why choose AAC blocks?
AAC blocks have come a long way since their invention. These are now part of smart construction technologies and are used in prefabricated and modular buildings
around the world. As more countries focus on eco-friendly construction, AAC blocks will continue to grow in demand.
Research is also ongoing to improve AAC quality even more. Manufacturers are testing new raw materials, recycling techniques, and faster curing processes. Some even use robots for AAC block cutting and handling.
Conclusion
Clay bricks and AAC blocks both have merits. Red bricks are durable but heavy, heat-absorbing, and less eco-friendly. AAC blocks are lighter, faster, sustainable, and smart for modern Bangladesh construction.
Since 2011, has delivered innovative solutions nationwide. As the exclusive DONGYUE AAC Block machine partner, they bring world-class technology to Bangladesh.
Contact us today for a free quote.
