WHAT IS FINE AGGREGATES -TS
Fine aggregate , typically sand or crushed stone, refers to granular material with particles smaller than 4.75 mm (passing a #4 sieve) used in construction to fill voids, improve concrete's workability, density, strength, and finish, by creating a dense, compact mix with coarse aggregates. Essential properties include particle size (fineness modulus), shape, cleanliness, and specific gravity, with sources like natural river sand, crushed rock, or gravel. Key Characteristics Size : Particles pass through a 4.75 mm sieve but are retained on a 75-micron sieve (or #200 sieve). Composition : Usually silica (quartz) but can be other minerals; must be clean and free from clay, silt, or organic matter. Fineness Modulus : A measure of average particle size, typically 2.3 to 3.1 for concrete. Role in Concrete Void Filling: Fills the gaps between larger coarse aggregates, increasing density and reducing porosity. Workability : Makes concrete easier to mix, place, and finis...