BIS CERTIFICATION FOR COMPOSITE CEMENT
IS 16415:2015

Composite cement is blended cement that contains more than one blending material. IS: 16415-2015 covers composite cement, which provides an excellent opportunity to make high-strength, long-lasting concrete. This standard outlines how composite cement is made and the chemical and physical requirements.

Composite cement is made up of high-quality clinker, fly ash, granulated slag, and gypsum. Typical range of these components is clinker (35% to 65%), fly ash (15% to 35%), granulated slag (20% to 50%) and gypsum (3% to 5%).

Composite cement shall be produced by intimately inter grinding Portland cement clinker, granulated slag, and fly ash with required addition of gypsum or by intimately and uniformly blending ordinary Portland cement, finely ground granulated slag, and fine fly ash with the required addition of gypsum to produce a cement capable of complying with this standard.

Concretes for special applications can be made with composite cement containing a fly ash component. Alkaline and sulphate corrosion-resistant concrete can be made with blended cement. Composite cement shall comply with the chemical and physical requirements given in the standard.

Tests

The following test shall be carried out for composite cement.

1. Physical test
• Fineness
• Setting time
• Soundness test
• Compressive strength
• Fly ash testing
2. Chemical test
• Magnesia
• Insoluble Residue
• Loss of ignition

A laboratory shall be adequately maintained, in which the various tests shall be carried out according to the methods specified in the standard.

The manufacturer must demonstrate that the cement meets the requirements of this standard. IS 16415:2015 specifies the marking and packing requirements. Each bag or drum of cement must be labelled with the information specified in the standard. The cement may also be labelled with the ISI Certification mark. The Manufacturer must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark). The BIS grants a license based on a successful assessment of manufacturing infrastructure, quality control and testing capabilities, and production process.

Indian Stantdard for Cements

IS Number	Product Name
IS 1489 (PART 2)	PORTLAND POZZOLANA CEMENT
IS 455:2015	PORTLAND SLAG CEMENT
IS 12330	SULPHATE RESISTING PORTLAND CEMENT
IS 12600	LOW HEAT PORTLAND CEMENT
IS 1489 (PART 1): 2015	PORTLAND POZZOLANA CEMENT
IS 269:2015	ORDINARY PORTLAND CEMENT
IS 3466:1988	MASONRY CEMENT
IS 6909:1990	SUPERSULPHATED CEMENT
IS 8042:2015	WHITE PORTLAND CEMENT
IS 6452:1989	HIGH ALUMINA CEMENT
IS 8043:1991	HYDROPHOBIC PORTLAND CEMENT
IS 8229:1986	OIL WELL CEMENT
IS 15895:2011	HIGH ALUMINA REFRACTORY CEMENT
IS 16993:2018	MICROFINE ORDINARY PORTLAND CEMENT

NOTE:

For Detailed Information about the

Conclusion:

If a product falls under the scope of the BIS Conformity Assessment Scheme, All the manufacturers, importers, and foreign entities must obtain BIS ISI Certification. The Bureau may cancel the License if the product fails to meet certification requirements.

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