Fine Aggregate

“Fine aggregate” means sand which is a mixture of small particles of grains & minerals which passes under 9 mm sieve & it is used for construction purposes like mixing in concrete & farming works etc. There are two types of sand like river sand & M sand , river sand means which i have mentioned above M sand( manufactured sand) which is crushed from coarse aggregates through crushing machines, nowadays M sand is rocking in the city because its eco friendly & low in cost. Reduce using river sand because it is very useful for our nature & go with M sand

The fine aggregate specific gravity test is used to calculate the specific gravity of a fine aggregate sample by determining the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. It is similar in nature to the coarse aggregate specific gravity test. The fine aggregate specific gravity test measures fine aggregate weight under three different sample conditions: Oven-dry (no water in sample). Saturated surface dry (water fills the aggregate pores). Submerged in water (underwater).

Using these three weights and their relationships, a sample’s apparent specific gravity, bulk specific gravity and bulk SSD specific gravity as well as absorption can be calculated. Aggregate specific gravity is needed to determine weight-to-volume relationships and to calculate various volume-related quantities such as voids in mineral aggregate (VMA), and voids filled by asphalt (VFA). Absorption can be used as an indicator of aggregate durability as well as the volume of asphalt binder it is likely to absorb.

Fine aggregate is generally classified as the portion that passes 1/4" sieve. Together with coarse aggregate, they provide a dense framework. Natural fine aggregate is obtained from the finer fraction of sand and gravel deposits. The sand was deposited by running or moving water in river, shore, or glacial environment. Increasingly, manufactured fine aggregate is being used. Manufactured sand is either a byproduct of coarse aggregate crushing, or is crushed specifically for the purpose. The quality of the sand is a function of the materials it contains. In the case of natural aggregate, the quality of sand particles depend on the alluvial source material; for manufactured fine aggregate, the quality is function of the rock source.