Hydrophobic Portland cement (aka HPC) refers to a type of cement that is designed to resist water and repel moisture. Its boosts the durability and lifespan of concrete structures by minimizing their susceptibility to water damage. HPC also comprises water-repellent chemicals, which are added during the manufacturing process. These chemicals surround the cement particles and boost their hydrophobic ability, allowing them to repel water with ease.
The use of HPC is particularly beneficial in moisture-prone areas or where the likelihood of water confrontation is higher. It can also be used in structures such as swimming pools, dams, and bridges. Let’s explore the process of securing BIS certification for Hydrophobic Portland cement.
What Role Does IS 8043:1991 Play In BIS Certification For Hydrophobic Portland cement?
The standard IS 8043:1991 pertains to hydrophobic Portland cement and outlines the necessary manufacturing processes, as well as chemical and physical requirements.
To produce hydrophobic cement, calcareous and argillaceous materials, along with silica, alumina, or iron oxide-bearing materials, are mixed together and burned at high temperatures. The resulting clinker is then ground with natural or chemical gypsum and small amounts of a hydrophobic agent.
Hydrophobic cement comprises admixtures that reduce the wetting ability of cement grains. Common admixtures include naphthensoap, Acidol, oxidized petrolatum, and others.
These chemicals create a layer on the cement particle, preventing water from initiating the hydration process during transportation or storage. The hydrophobic properties of the cement allow it to be stored for longer periods in highly wet climatic conditions.
This type of cement is suitable for constructing water structures such as dams, spillways, and other submerged structures. The standard IS 269:1989 outlines the chemical requirements for hydrophobic Portland cement.
To meet the standard, hydrophobic Portland cement must satisfy the chemical and physical requirements specified and be tested as per the methods outlined. It is the onus of the manufacturer to ensure that their product complies with this standard. A laboratory must be maintained to conduct the necessary tests using the methods specified in the standard.
Mandatory Tests under BIS Certification for Hydrophobic Portland cement
The following test shall be carried out for hydrophobic Portland cement in accordance with the method specified.
- Fineness test
- Setting time test
- Compressive Strength test
- Transverse Strength Test
- Soundness test
- Chemical requirement test
Underlining Labelling and Marking Norms for Hydrophobic Portland cement
Hydrophobic Portland cement packaging must adhere to the norms cited in the IS 8043:1991 standard, including apt labelling and marking. Each bag or drum of hydrophobic Portland cement must display the ISI marking, the sign of quality, or have it printed on the label applied to it, provided that the material is of the required standard.
To use the standard mark (ISI Mark), the manufacturer must obtain a BIS license from the Bureau of Indian Standards. The BIS grants the license after a successful assessment of the manufacturing infrastructure, quality control, testing capabilities, and production process.
Documents Required for BIS Certification for Hydrophobic Portland cement
The following documents are generally required for BIS certification for ISI marking in India:
- Application form relating to the BIS certification
- Test report granted by the BIS-recognized laboratory
- Production facility details and production process flow chart
- Quality control plan as well as test procedures
- List concerning machinery and equipment used for cement production
- Details relating to raw materials
- Undertaking for compliance with BIS guidelines
- Copy of the trademark registration if applicable
- Authorization letter concerning authorized Indian representative, if applicable
Process Concerning BIS Certification for Hydrophobic Portland cement
BIS (Bureau of Indian Standards) certification is mandatory for all products falling under its ambit. Hydrophobic Portland cement is no exception. In order to obtain BIS certification for hydrophobic Portland cement, the manufacturer must follow the given procedure.
- Step 1: Application Filing
The first step is the about the submission of BIS certification application. The application must include all the applicable dossiers such as test reports, quality control measures, and other relevant information. The application fee must also be paid in this step.
- Step 2: Paperwork Vetting
Once the application is received, BIS will perform a preliminary assessment of the furnished documents. If the documents are found to be satisfactory and complete, the manufacturer will be allowed to carry out the necessary tests.
- Step 3: Product Testing
The next step is to perform the standard tests on the hydrophobic Portland cement. The BIS-approved laboratory shall conduct these tests. The tests will include physical, chemical, and performance tests. The tests will be conducted to ensure that the product in question meets the underlying BIS standards.
- Step 4: Grant of BIS Certification
Once the tests are finished, the test reports must be shared with BIS for final review. If the test reports are found to be satisfactory, BIS will accord approval for the product to be sold in India with the ISI marking.
It is vital to note that BIS certification is not a one-time process. The manufacturer should continue to abide by the relevant BIS standards by carrying out regular quality control measures as well as tests. Failure to do so can lead to the cancellation of BIS certification. It is better to avail of expert advice from Corpbiz to stay atop such nuisances.
In conclusion, obtaining BIS certification for hydrophobic Portland cement requires careful planning and adherence to underlying norms and procedures. However, it is a vital step for any manufacturer who intends to sell their product in and outside the country and ensures that the product adheres to the required quality standards.
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