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IS 2547:2000 (Part 2) is the Indian Standard (BIS) for gypsum building plaster, part 2: premixed lightweight plaster. This standard covers the specification for premixed lightweight gypsum building plaster used for internal plastering. It incorporates lightweight aggregates like exfoliated vermiculite or expanded perlite to reduce dead weight and improve thermal insulation.
gypsum building plaster, Part 2: Premixed lightweight plaster
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Building Limes and Gypsum Products
EN 13279-1:2008CEN (European Committee for Standardization)
HighCurrent
Gypsum binders and gypsum plasters - Part 1: Definitions and requirements
Covers gypsum binders and plasters, with specific types (e.g., 'B1') directly comparable to IS 2547 plasters.
ASTM C28 / C28M - 21ASTM International (US)
HighCurrent
Standard Specification for Gypsum Plasters
Specifies requirements for various gypsum plasters, including 'neat plaster' which is analogous to IS code's basic types.
BS EN 13279-1:2008BSI (UK)
HighCurrent
Gypsum binders and gypsum plasters. Definitions and requirements
The British adoption of the European standard, covering the same scope of gypsum-based plastering materials.
DIN 1168-1DIN (Germany)
MediumWithdrawn
Gypsum building plasters - Part 1: Types and requirements
Former German national standard for gypsum plasters, now replaced by the harmonized European standard.
Key Differences
≠IS 2547 uses a descriptive classification (e.g., 'Retarded hemihydrate gypsum plaster'), whereas EN 13279-1 uses an alphanumeric coding system (e.g., 'B1/20/2' for building plaster/setting time/strength) that is more performance-oriented.
≠The Indian standard specifies minimum chemical composition limits, such as SO3 content (e.g., min 40% for hemihydrate plaster). In contrast, standards like ASTM C28 focus more on physical performance requirements and less on prescriptive chemical composition.
≠Compressive strength requirements vary significantly. IS 2547 specifies a single minimum value for each plaster type (e.g., 6.0 N/mm² for retarded hemihydrate), while EN 13279-1 provides strength classes (starting from ≥2.0 N/mm²), allowing for a wider range of products.
≠The standard consistency test method, used to determine the water/plaster ratio for other tests, has different procedural details and target slump/penetration values between the IS code and international counterparts like ASTM C472 (the test method standard for ASTM C28).
Key Similarities
≈All standards are fundamentally based on calcium sulfate hemihydrate (CaSO₄·½H₂O) or anhydrous calcium sulfate (CaSO₄) as the primary binding agent.
≈The use of the Vicat apparatus is the universally accepted method across IS, EN, and ASTM standards for determining the initial and final setting times of the plaster.
≈All standards regulate the same core physical properties considered essential for plaster quality control: setting time, compressive strength, and fineness (particle size distribution).
≈The scope of IS 2547 Part 1, by excluding premixed lightweight plasters, directly corresponds to specific categories within the international standards, such as 'Gypsum Neat Plaster' in ASTM C28 or basic building plasters (Type B) in EN 13279-1.
Parameter Comparison
Parameter
IS Value
International
Source
Initial Setting Time (Retarded Hemihydrate Plaster)