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IS 8042:1989 is the Indian Standard (BIS) for white portland cement – specification. 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
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Cement, Concrete, Aggregates and RCC
! 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.
GB/T 2015-2017Standardization Administration of China (SAC), China
HighCurrent
White Portland Cement
Direct equivalent standard specifically for the classification, requirements, and testing of white Portland cement.
ASTM C150 / C150M - 23aAmerican Society for Testing and Materials (ASTM), USA
MediumCurrent
Standard Specification for Portland Cement
White cement is manufactured to meet the requirements of Type I (or other types) in this standard, with additional non-mandatory controls on coloring oxides.
EN 197-1:2011European Committee for Standardization (CEN), Europe
MediumCurrent
Cement - Part 1: Composition, specifications and conformity criteria for common cements
This is the parent standard for common cements; white cement is typically classified as a CEM I (Portland Cement) with specific raw material selection for color.
AS 3972-2010Standards Australia, Australia
MediumCurrent
General purpose and blended cements
White cement falls under Type GP (General Purpose) cement in this standard, which sets the base performance and chemical requirements.
Key Differences
≠IS 8042 mandates a minimum whiteness of 70% on the Hunter scale, whereas general standards like ASTM C150 and EN 197-1 do not specify color. The Chinese standard GB/T 2015 has even stricter, graded whiteness requirements (e.g., ≥87 for Grade 1).
≠IS 8042 specifies a single strength grade (33 MPa at 28 days). In contrast, EN 197-1 and GB/T 2015 offer multiple strength classes (e.g., 32.5, 42.5, 52.5), allowing for a wider range of applications.
≠The maximum permissible Iron (III) Oxide (Fe₂O₃) content, crucial for whiteness, is explicitly limited to 0.4% in IS 8042. GB/T 2015 is slightly stricter at ≤0.35%, while ASTM C150 and EN 197-1 lack a mandatory limit for this specific purpose, relying on manufacturer controls.
≠IS 8042 specifies a minimum fineness of 320 m²/kg (Blaine). This differs from ASTM C150's minimum of 280 m²/kg for Type I cement, reflecting different philosophies on the balance between reactivity and water demand.
Key Similarities
≈All standards are based on the fundamental chemistry of Portland cement, derived from clinker produced by calcining calcareous and argillaceous materials, with the primary difference being the selection of raw materials low in coloring metal oxides like iron and manganese.
≈All referenced standards require soundness testing (e.g., Le Chatelier expansion or Autoclave expansion) to ensure long-term dimensional stability of the hardened cement paste.
≈IS 8042, ASTM C150, and EN 197-1 all specify mandatory limits for initial and final setting times to ensure adequate workability and timely hardening, although the specific time limits vary.
≈The principle of evaluating strength development through compressive strength tests on mortar cubes or prisms at specified ages (e.g., 3, 7, and 28 days) is a common methodology across all the standards.
Parameter Comparison
Parameter
IS Value
International
Source
28-Day Compressive Strength (min)
33 MPa
28.0 MPa (for Type I)
ASTM C150
Iron (III) Oxide (Fe₂O₃) (max)
0.40%
0.35%
GB/T 2015-2017
Initial Setting Time (Vicat, min)
30 minutes
45 minutes
ASTM C150
Final Setting Time (Vicat, max)
600 minutes
375 minutes
ASTM C150
Fineness (Blaine, min)
320 m²/kg
280 m²/kg (for Type I)
ASTM C150
Soundness (Le Chatelier Expansion, max)
10 mm
10 mm
EN 197-1:2011
Whiteness (min)
≥ 70% (Hunter Scale)
≥ 87 (for Grade 1)
GB/T 2015-2017
⚠ Verify details from original standards before use