IS 16415: 2015
Cement - Composite Cement- Specification.
Summary
Composite cement is a blended cement manufactured by combining clinker with supplementary materials such as fly ash, slag, or limestone. It offers improved durability, better workability, and reduced environmental impact. It is widely used in residential, commercial, and infrastructure construction projects.
Why BIS Certificate is Mandatory for OCOMPOSITE CEMENT?
BIS certification is mandatory for composite cement to ensure structural safety, consistent quality, and compliance with Indian construction standards. It verifies strength, setting time, and durability, preventing substandard cement from entering the market and protecting public safety and infrastructure integrity.
What is BIS Certified for COMPOSITE CEMENT ?
The BIS certified specification for composite cement is IS 16415:2015 – Composite Cement — Specification. It defines chemical composition, physical properties, compressive strength, fineness, setting time, and quality tests to ensure uniform performance and long-term durability in construction.
Test required For COMPOSITE CEMENT
| Title | Mandatory/Optional |
|---|---|
| Granulated Slag | Optional |
| Fly ash | Required |
| Portland Cement Clinker | Required |
| Ordinary Portland Cement | Optional |
| Insoluble residue | Required |
| Magnesia | Required |
| Total Sulphur content calculated as sulphuric anhydride (SO3) | Required |
| Sulphide Sulphur (S) | Required |
| Loss on ignition | Required |
| Chloride Content | Required |
| Alkali Content | Optional |
| Fineness | Required |
| Soundness (Le-Chatelier method and Autoclave method) | Required |
| Setting Time | Required |
| Compressive strength | Required |
| Drying shrinkage | Required |
| Optional | Optional |
| Soundness | Optional |
Benefits of BIS Certification for COMPOSITE CEMENT
1. Structural Safety Assurance - BIS certification ensures composite cement meets required strength and durability standards, reducing risks of structural failure.
2. Consistent Quality Control - Certified cement undergoes strict testing for composition, fineness, and performance, ensuring uniform quality across batches.
3. Legal Compliance - BIS marking is mandatory in India, allowing manufacturers and importers to sell cement without legal or regulatory issues.
4. Environmental Benefits - BIS-approved composite cement promotes sustainable construction by encouraging the use of industrial by-products like fly ash and slag.
5. Market Trust and Acceptance - BIS certification builds confidence among builders, engineers, and government bodies, improving brand value, eligibility for tenders, and market competitiveness.