Aggregates & Materials
Specific Gravity
// Definition
The ratio of the density of an aggregate to the density of water. Used in mix design to convert weights to volumes.
Typical values: coarse aggregate 2.6-2.9, fine aggregate 2.5-2.7. Aggregates with very low SG may indicate porosity or weak particles.
// Related Indian Standards
IS 2386
// Cross-references
Coarse Aggregate
Aggregate retained on the 4.75 mm IS sieve. Forms the bulk of concrete volume (60-75%) and provides dimensional stability.
Fine Aggregate
Aggregate passing the 4.75 mm IS sieve — sand. Fills voids between coarse aggregates and contributes to workability.
Mix Design
The process of selecting cement, water, aggregates, and admixtures in correct proportions to produce concrete that meets strength, workability, and durability requirements.
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