IS 16415:2015 specifies requirements for Composite Cement used in construction. The standard covers chemical and physical properties, including insoluble residue, loss on ignition, fineness, setting time, magnesia and sulphide sulphur, along with strength requirements. BIS certification under this standard supports ISI Mark compliance for composite cement. Certko helps businesses arrange testing through suitable recognised laboratories and prepare documentation for BIS compliance.
Chemical Testing
Composite cement — IS 16415 (2015) Testing
IS 16415 (2015) is a BIS product testing standard for cement & construction materials (1 notified product). Book laboratory testing required for ISI Mark / CRS certification.
IS · India
IS (Indian Standards) — typically accepted in India. Bureau of Indian Standards test methods — primary evidence for BIS / India market compliance and many domestic buyer specs.
- Product category
- Cement & Construction Materials
- Main standard
- IS 16415 (2015)
- Test type
- Chemical / composition
- Accreditation
- ISO/IEC 17025 / NABL (BIS-recognised labs)
- Testing timeline
- 7–12 working days
- Sample size required
- 100–500 g representative sample (or as per IS)
- Tentative testing price
- ₹4K – ₹35K
Indicative BIS lab charges from product records — confirm with the laboratory.
BIS products tested to this standard
1 BIS-notified product map to IS 16415 (2015) — open a product for scheme, labs and indicative costs.
FAQs about Composite cement — IS 16415 (2015) Testing
Q1. What raw materials are used for composite cement under IS 16415?
The standard identifies granulated slag conforming to IS 12089, fly ash conforming to IS 3812 (Part 1), Portland cement clinker conforming to IS 16353 and Portland cement conforming to IS 269 as relevant raw materials.
Q2. What chemical tests are performed for IS 16415:2015?
Chemical evaluation includes parameters such as insoluble residue, magnesia, total sulphur, sulphide sulphur and other applicable requirements specified for composite cement. These tests help verify conformity with the standard.
Q3. What physical tests are required for IS 16415:2015?
Physical testing covers important characteristics such as fineness, soundness, setting time and compressive strength. These tests help assess the cement's performance, stability and strength development.
Q4. What is the sample quantity for IS 16415 testing?
The BIS product manual specifies a sample size of 8 kg for physical testing and 1 kg for chemical testing for composite cement under IS 16415:2015.
Q5. Is transverse strength testing mandatory under IS 16415?
Transverse strength is identified in the BIS product manual as an optional test, depending on the agreement between the purchaser and manufacturer.
Q6. Does BIS provide laboratory testing for IS 16415:2015?
Yes. BIS's laboratory system lists laboratories with scope for IS 16415:2015 Composite Cement – Specification, including chemical and physical testing requirements.
Q7. Has IS 16415:2015 been amended?
Yes. BIS published Amendment No. 1 to IS 16415:2015, which included changes to material proportions and increased compressive-strength requirements.
Q8. Is IS 16415:2015 included in BIS product certification?
Yes. BIS currently lists IS 16415:2015 Composite Cement among its product-specific manuals, supporting certification and conformity assessment under the applicable BIS requirements.
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