BIS Certification for AAC Blocks (Autoclaved Cellular Concrete) IS 2185 (Part 3):1984

To regulate the quality, safety, and performance of AAC blocks used across India, the Bureau of Indian Standards (BIS) has specified norms under the IS 2185 (Part 3):1984. BIS certification under this standard ensures that AAC blocks meet defined criteria for dimensions, compressive strength, density, and durability, making them suitable for safe and reliable construction.

What Are AAC Blocks?

Autoclaved Aerated Concrete (AAC) blocks, also known as Autoclaved Cellular Concrete, are precast, lightweight concrete masonry units. They are made using cement, lime, silica-rich materials (such as fly ash or sand), water, and aluminum powder (as an expanding agent). The reaction between aluminum powder and lime generates hydrogen gas, creating millions of microscopic air bubbles. Once the material is set, it is autoclaved (steam-cured under pressure) to harden and form a strong, lightweight block with a cellular structure.

ACC blocks are widely used in construction because of various advantages like lightweight, superior thermal insulation, excellent fire resistance, acoustic performance, eco-friendliness, faster construction, pest resistance, and durability. These features make AAC blocks a sustainable choice for green buildings, affordable housing, and modern high-rises.

IS 2185 (Part 3):1984 – The Standard for AAC Blocks

The Indian Standard IS 2185 (Part 3):1984 defines the specifications for Autoclaved Cellular Concrete (ACC or AAC) masonry units, ensuring quality, uniformity, and performance for construction applications.

Key Provisions of the Standard:

The standard ensures that blocks perform well in load-bearing and non-load-bearing construction.

Why BIS Certification is Mandatory for AAC Blocks

BIS certification is crucial to:

The ISI Mark issued by BIS is a symbol of trust, quality, and regulatory compliance.

Key Tests Conducted for BIS Certification of AAC Blocks

To obtain BIS certification, manufacturers must undergo rigorous testing and quality assessment. The following tests are performed as per IS 2185 (Part 3):1984:

● Dimensions and Tolerance Test

● Dry Density Test

● Compressive Strength Test

● Drying Shrinkage Test

● Thermal Conductivity Test

● Water Absorption Test

● Sound Insulation Performance

● Moisture Movement & Warping Tests

● Workability and Surface Finish Assessment

All testing must be carried out in BIS-recognized laboratories.

BIS Certification Process for AAC Blocks

Here’s a simplified view of the BIS certification procedure:

1. Application Filing: Submit a detailed application to BIS with factory and product details.
   
   
2. Factory Inspection: BIS officials inspect the production process, testing setup, and quality control measures.
   
   
3. Sample Collection: Product samples are taken for third-party lab testing.
   
   
4. Test Report Review: BIS reviews the results for compliance with IS 2185 (Part 3):1984.
   
   
5. License Grant: On successful evaluation, BIS issues the license to use the ISI mark.
   
   
6. Surveillance Audits: Regular checks to ensure ongoing compliance and product consistency.

To Know The Process in Detail, Please Visit:

• BIS ISI Mark Certification for Domestic Manufactures
• BIS ISI Mark Certification for Foreign Manufactures

Under BIS Registration Products ISI and CRS

• BIS CRS Registration For IT Products List
• BIS ISI Mark Certification For ISI Products List

Documents Required for BIS Certification

To apply for BIS certification, manufacturers need to submit the following documents:

●  Application form

●  Manufacturing process details

●  Quality control plan

●  Test reports from BIS-approved laboratories

●  Factory layout and equipment details

●  Proof of business registration

●  Product specifications and technical details

●  Declaration of conformity to Indian standards

Additionally, manufacturers may be required to provide proof of compliance with environmental and safety regulations, depending on the specific type of product being certified.

BIS ISI Mark Certification Costing And Timeline

EVTL India – Your Expert Partner for BIS Certification

Navigating the BIS certification process can be complex, but that’s where EVTL India comes in.

We offer end-to-end support for manufacturers of AAC blocks, including:

With deep domain expertise and a hands-on approach, we help fast-track your certification and bring your AAC blocks to market with full compliance and confidence.

Conclusion

Autoclaved Aerated Concrete (AAC) blocks represent the future of sustainable and energy-efficient construction in India. However, ensuring product quality and standardization is critical for the safety, durability, and credibility of any construction project.

BIS Certification under IS 2185 (Part 3):1984 is not just a legal requirement – it’s a mark of trust, quality, and safety.