IS 4911:1986 is the Indian Standard (BIS) for glossary of terms relating to bituminous waterproofing and damp-proofing of buildings. This standard provides a comprehensive glossary of terms related to bituminous waterproofing and damp-proofing of buildings. It is designed to standardize the vocabulary used in specifications, contracts, and construction to prevent ambiguity.
Glossary of terms relating to bituminous waterproofing and damp-proofing of buildings
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Term: Bitumen | A viscous liquid, or a solid, consisting essentially of hydrocarbons... It is substantially soluble in carbon disulphide. | A class of black or dark-colored... amorphous, cementitious substances... in which the predominating constituents are bitumens... soluble in carbon disulfide. | ASTM D1079-23 |
| Term: Asphalt | A natural or artificial mixture in which bitumen is associated with inert mineral matter. The word 'asphalt' is also used at times to denote bitumen. | Often used in North America to refer to the binder (bitumen). ASTM D1079 notes it is a cementitious material in which bitumens are the main constituents, acknowledging its synonymous use with bitumen. | ASTM D1079-23 |
| Term: Damp-Proof Course (DPC) | A layer of impervious material laid in a wall... to prevent moisture from rising up the wall... | A barrier, usually a membrane, flexible sheet material or chemical formulation, inserted into the fabric of a building to control the unwanted passage of moisture from the ground. | BS 8102:2022 |
| Term: Blown Bitumen | Bitumen obtained by blowing air through it at an elevated temperature. | Asphalt, oxidized (blown) - asphalt that is treated by blowing air through it at elevated temperature to increase its softening point and modify other properties. | ASTM D1079-23 |
| Term: Flashing | A strip of impervious material... used to make a watertight joint, for example, between a flat roof and a wall. | A component used to weatherproof or seal the roof system edges at perimeters, penetrations, walls, expansion joints, valleys, drains, and other interruptions or terminations of the roof system. | ASTM D1079-23 |
| Term: Primer | A liquid of low viscosity which is applied to a surface to improve the adhesion of a subsequent coating. | A thin, liquid-applied solvent-based bitumen that is applied to a surface to improve the adhesion of subsequent applications of bitumen. | BS 6229:2018 |