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In this competitive scenario, it isn't easy to survive in the market without a standard quality and certified product. BIS license may also be required to sell products in the Indian market.

To get BIS certification and produce a standard quality product, the manufacturer must ensure that their product must follow the specified Indian standard.

Let's take a closer look at IS 1489 (Part 2) for Portland pozzolana cement – fly ash based.

The production, physical, and chemical requirements of Portland pozzolana cement - fly ash pozzolana are covered in this standard (Part 1). The Bureau of Indian Standards adopted this Indian Standard (Part 1) after the draft finalized by the Cement and Concrete Sectional Committee was approved by the Civil Engineering Division Council.

The standard specifies the chemical requirements of the cement as well as the physical requirements such as fineness, compressive strength, and soundness, among others, as well as the storage conditions for the cement.

Portland Pozzolana Cement is a type of Blended Cement made by either inter-grinding OPC clinker with gypsum and pozzolanic materials in specific proportions or grinding the OPC clinker, gypsum, and Pozzolanic materials such as fly ash separately and thoroughly blending them in specific proportions. The fly ash constituent must be no less than 15% and no more than 35% by mass of Portland pozzolana cement, according to the standard.

Pozzolana, such as fly ash, is essentially a siliceous material that, while having little or no cementitious properties on its own will react with calcium hydroxide at ambient temperature to form compounds with cementitious properties when finely divided and in the presence of water. Portland-pozzolana cement shall comply with the chemical and physical requirements specified in the standard.