What is the minimum whiteness required for this cement?

A minimum reflectance of 70% when tested as per the procedure in Annex B (Table 2).

What are the compressive strength requirements for white cement?

Minimum 16 MPa at 3 days, 27 MPa at 7 days, and 37 MPa at 28 days (Table 2).

What is the maximum permissible limit for Magnesia (MgO)?

The maximum permissible limit for Magnesia (MgO) is 5.0 percent by mass (Table 1).

What are the setting time limits?

The initial setting time shall not be less than 30 minutes, and the final setting time shall not be more than 600 minutes (Table 2).

IS 8042

: 1989

White Portland cement – Specification

CurrentSpecializedSpecificationMaterials Science · Cement, Concrete, Aggregates and RCC

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This standard specifies the requirements for the manufacture, chemical composition, and physical properties of white Portland cement. It is primarily used for non-structural and decorative purposes like architectural concrete, precast panels, terrazzo flooring, and pointing mortar where whiteness and aesthetics are important.

White Portland cement – Specification

Quick Reference Values

Minimum Whiteness (Reflectance)70 %

Maximum Magnesia (MgO) content5.0 %

Maximum Total Sulphur (SO3) content3.0 %

Minimum Fineness (Blaine's)225 m²/kg

Initial Setting Time30 minutes (minimum)

Final Setting Time600 minutes (maximum)

Minimum 3-day Compressive Strength16 MPa

Minimum 28-day Compressive Strength37 MPa

Practical Notes

The defining characteristic is 'whiteness', achieved by using raw materials with extremely low iron and manganese oxides.

To maintain the white color in the final product, it is crucial to use clean, non-staining aggregates, potable water, and non-corroding mixing equipment.

While it has strength properties comparable to Ordinary Portland Cement, its primary application is aesthetic rather than structural.