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Walls used to be made only of heavy, dense red bricks. Now, a better choice exists. It is called the Autoclaved Cellular Aerated Concrete (AAC) Block. These blocks are much lighter than bricks. They are strong, good at blocking heat and also good at blocking sound. Many modern construction projects use these smart blocks now. Because these blocks hold up our homes and offices their quality must be perfect. The government of India ensures this quality. They use the Bureau of Indian Standards (BIS). This board sets the rules. They enforce the ISI Mark Certification Scheme. You want to make these AAC blocks. You must follow the rule book, it is a must. The specific rule book for these masonry units is IS 2185 (Part 3).
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The Indian Standard IS 2185 (Part 3) is the official rulebook for AAC blocks. This standard sets all the necessary technical requirements. It ensures that the blocks possess the necessary qualities for safe construction.
This standard checks many important things. It checks the Compressive Strength of the block. This is how much pressure the block can take before it breaks. It is measured in Newtons per square millimeter. It also checks the Dry Density. AAC blocks must be light to be effective. The density must be within the specified limits. The standard also covers:
Just like steel or cement, you cannot just make AAC blocks and hope they are good. You must prove they are good all the time. The BIS mandates that every certified AAC block manufacturer must have a fully equipped in-house testing laboratory. Continuous quality control is the key requirement.
Your lab must have specific equipment for testing masonry products. The most important machine is the Compression Testing Machine (CTM). This machine is used to measure the block's compressive strength. You must also have:
Getting the ISI Mark follows a clear, structured path. You must complete each step carefully
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Your application must be supported by correct, complete documents. Prepare them carefully.
The ISI Mark license is not given forever. It is usually valid for a set period, often one to two years initially. You must renew it regularly. Renewal is not automatic. You must show that you have maintained the quality consistently throughout the year
The BIS conducts Surveillance. This means they make surprise visits to your factory. They check your records. They might take samples from your finished goods stock or from the open market, to check their quality again. They check these samples against the IS 2185 (Part 3) standard again.
Securing the BIS ISI Mark for your AAC Blocks is a mandatory step. It is your only legal way to sell these products in India. It proves your commitment to making safe, high-quality, and modern building materials.
The detailed requirements for the in-house laboratory the specific testing protocols, and managing the BIS documentation can be highly technical and confusing. Expert regulatory assistance is invaluable.
Don't risk having your blocks rejected by major builders or government projects. Ensure your factory meets every single requirement of IS 2185 perfectly. Contact Agile Regulatory today. We specialize in simplifying the complex BIS certification process for building materials
Nishi Chawla
12 Nov, 2025
Nishi Chawla
11 Nov, 2025
Nishi Chawla
11 Nov, 2025
Nishi Chawla
10 Nov, 2025
Nishi Chawla
10 Nov, 2025
Get Instant Solution By an Expert Advisor
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