2547
IS 2547 (Part 1) : 1976
summary
Gypsum Building Plaster is a fine white powder produced by partial or complete dehydration of gypsum. When mixed with water, it forms a smooth paste used for wall plastering, ceilings, molding, and decorative finishes. It provides quick setting, smooth surface finish, and good fire resistance in construction works.
Why BIS Certificate is Mandatory for GYPSUM BUILDING PLASTER – EXCLUDING PREMIXED LIGHTWEIGHT PLASTER
BIS certification is mandatory to ensure gypsum building plaster meets prescribed standards for purity, fineness, setting time, strength, and safety. Since it is widely used in building construction, certification prevents substandard material usage, ensures structural performance, and protects consumers from poor quality plaster affecting durability.
What is BIS Certified for GYPSUM BUILDING PLASTER – EXCLUDING PREMIXED LIGHTWEIGHT PLASTER
The BIS certified specification defines requirements for gypsum building plaster excluding premixed lightweight plaster. It covers chemical composition, fineness, setting time, compressive strength, soundness, and packaging. The standard also specifies testing methods and quality control measures to ensure consistent performance in construction applications.
Test required for GYPSUM BUILDING PLASTER – EXCLUDING PREMIXED LIGHTWEIGHT PLASTER
| Title | Mandatory/Optional |
|---|---|
| SO3 percentage by mass | Required |
| CaO percentage by mass | Required |
| Soluble magnesium salts expressed as percentage of MgO | Required |
| Soluble sodium salts expressed as percentage of Na2O | Required |
| Loss of ignition percent by mass | Required |
| Free lime percent | Required |
| Purity | Required |
| Setting time | Required |
| Transverse Strength | Required |
| Soundness | Required |
| Mechanical Resistance of set neat plaster | Required |
| Expansion on setting percentage | Required |
Benefits of BIS Certification for GYPSUM BUILDING PLASTER – EXCLUDING PREMIXED LIGHTWEIGHT PLASTER
1. Assured Product Quality
BIS certification ensures gypsum plaster meets defined chemical and physical properties, providing reliable strength, smooth finish, and consistent performance at construction sites.
2. Controlled Setting and Strength
Certified plaster follows prescribed setting time and compressive strength standards, preventing cracks, shrinkage, and weak surface bonding.
3. Safety and Fire Resistance
BIS standards ensure the material maintains required fire-resistant and non-toxic properties, improving overall building safety.
4. Legal Compliance and Market Approval
Mandatory BIS certification allows manufacturers and suppliers to legally sell gypsum plaster in India without facing regulatory penalties.
5. Increased Trust and Acceptance
BIS-marked gypsum plaster gains higher acceptance among builders, contractors, and government projects, enhancing brand credibility and competitiveness.