The Autoclaved Cellular Aerated Concrete (AAC) Blocks have become common in modern constructions owing to their light weight, insulating property, and high strength to weight ratio. The Concrete Masonry Units are vital for efficient construction, lowering structural loads, and offering good fire resistance to the buildings being erected. Since the construction units are important in ensuring effective and sustainable structures, there are certain requirements that need to be followed while manufacturing the units in accordance with BIS IS 2185 (Part 3):1984 regarding AAC blocks.
There are various technical specifications that need to be followed according to the Indian Standard in order to manufacture high quality AAC Blocks. Some of these include the requirements related to the density classes, compressive strengths, dimensional tolerances, moisture movement, drying shrinkage and water absorption. These requirements ensure the quality of the AAC Blocks and offer good performance. It is mandatory to fulfill the requirement of BIS Quality Control Orders (QCO) and be certified as per the requirements of IS 2185 (Part 3):1984 in order to produce and sell AAC blocks in India.
IS 2185 (Part 3):1984 is the Indian Standard that specifies the requirements for Autoclaved Cellular Aerated Concrete (AAC) Blocks used in building construction. The standard establishes quality parameters to ensure the blocks provide adequate structural performance, durability, and dimensional accuracy. As per BIS requirements, AAC blocks are:
BIS certification under IS 2185 (Part 3):1984 is applicable to organizations involved in manufacturing, importing, or supplying AAC blocks in India.
Applicable to:
Certification by BIS based on IS 2185 (Part 3):1984 ensures that the quality standards set forth by India for AAC hollow and solid concrete blocks are met.
For ensuring the safety and reliability of AAC Blocks, the Bureau of Indian Standards prescribes the necessary minimum standards as per IS 2185 (Part 3):1984. The BIS ISI certification provides assurance that the manufacturer ensures uniform quality standards as prescribed in the standards. In addition, it assures us that AAC Blocks offer sufficient strength and durability in varied environments. The following is a list of the BIS testing parameters for AAC Blocks:
The BIS certification procedure involves checking the compliance of Autoclaved Cellular Aerated Concrete Blocks (AAC) as specified in IS 2185 (Part 3):1984 with all the required performance standards. The following procedure has been laid down by the Bureau of Indian Standards (BIS):
Foreign manufacturers need to appoint an Authorized Indian Representative (AIR) in India. This person is the local point of contact for the Bureau of Indian Standards (BIS) and takes care of all rules and compliance work in India.
The BIS ISI mark on AAC Cement Blocks should be prominently placed after getting approval from the Bureau of Indian Standards (BIS). In addition to the ISI Mark, certain vital information like the manufacturer’s name, Standard Number (IS 2185 Part 3:1984) and Licence Number (CM/L) should also be provided. The purpose of the ISI mark is to make sure that the AAC blocks meet certain predefined quality and strength standards. Here is some additional information:
Note: Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
Validity and Renewal of BIS Licence for AAC Blocks
BIS Certification Cost for AAC Blocks as per IS 2185 (Part 3)
The costs of BIS Approval for AAC Blocks (Concrete Masonry Units) cover the costs incurred in application, inspection, licensing, testing, and marking processes. This cost is determined by BIS in accordance with Scheme I standards for conformity assessment. The total cost of certification may differ according to the location of the plant, manufacturing capacity and testing standards. Testing fees are charged directly to BIS-recognised testing labs, while inspection and marking costs depend upon BIS standards. Consultant fees may also be incurred by manufacturers seeking professional assistance.
Important Cost Notes:
- Application fee for foreign manufacturers is payable via SWIFT (SAARC countries may pay in INR with applicable GST).
- Audit charges for foreign manufacturers vary based on country/location.
- The marking fee is determined based on the product category and production volume (MSME benefits may apply).
- Testing charges are paid directly to BIS-recognised laboratories.
- Consultancy fees vary depending on product type and factory location.
What Happens If AAC Blocks Are Not BIS Certified?
Failure to follow regulations regarding ISI/BIS certification requirements for AAC panels would pose severe regulatory, financial, and quality concerns. Non-conforming products would fail to satisfy requirements of the relevant codes and thus pose serious consequences regarding the reliability of structures in accordance with IS 2185 (Part 3):1984.
For Manufacturers:
- Legal penalties, fines, and possible suspension of manufacturing operations.
- Loss of brand credibility and reduced customer trust in the market.
- Restrictions on accessing government and large infrastructure projects.
- Difficulties in obtaining future BIS approvals or certifications.
For Consumers:
- Increased risk of using substandard or non-compliant construction materials.
- Possibility of structural defects or reduced building durability.
- Higher maintenance and repair costs over time.
- Delays and additional expenses in construction projects due to poor material quality.
Conclusion
Autoclaved Cellular Aerated Concrete (AAC) Blocks, which are among Concrete Masonry Units, are being widely used in current constructions due to light weight construction, energy saving, fire resistance, and high durability features. They also aid in keeping down the structural weight and provide insulation to energy consumption in buildings. The compliance with IS 2185 (Part 3):1984 will enable AAC Blocks to comply with all mandatory standards of density, compressive strength, dimensions, resistance to moisture, and durability.
The BIS Certification for Concrete Masonry Units enables AAC Blocks to meet all required Indian Standard quality standards, helping them obtain ISI marks as indicators of their performance. The certification also improves the acceptance of these products in all kinds of infrastructure works and housing projects within India. With appropriate assistance from EVTL India, AAC Blocks producers are able to complete the process of obtaining BIS certifications for IS 2185 (Part 3):1984.