IS 9498:1980 is the Indian Standard (BIS) for inorganic aggregates for use in gypsum plaster. This standard specifies the requirements for inorganic aggregates, such as sand or crushed stone sand, intended for use in gypsum plaster. It covers material properties, grading limits, and maximum permissible amounts of deleterious substances to ensure the quality and performance of the final plaster finish.
inorganic aggregates for use in gypsum plaster
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Grading: Max Particle Size (Passing) | 100% passing 2.36 mm sieve | 100% passing No. 8 (2.36 mm) sieve | ASTM C35 |
| Grading: Fines (Passing) | 0 to 5% passing 150 micron sieve | 0 to 10% passing No. 100 (150 micron) sieve | ASTM C35 |
| Clay, Silt and Fine Dust (by decantation) | Max 5.0% by weight | Max 3.0% by weight finer than 75-µm (No. 200) sieve | ASTM C35 |
| Water-Soluble Chlorides (as Cl) | Max 0.05% by weight | Categorized, e.g., Category Cl 0,06 (≤ 0.06% by mass of water soluble chloride ions) | EN 13139 |
| Sulfate Content | Max 0.5% water-soluble sulfate (as SO3) | Categorized total sulfur, e.g., Category S 1.0 (≤ 1.0% by mass) | EN 13139 |
| Organic Impurities Test | Liquid colour should not be darker than standard reference solution | Liquid color shall not be darker than the reference standard color solution | ASTM C35 |