Question: What Is The Fine Aggregate?

Is sand a fine aggregate?

Fine aggregates generally consist of natural sand (river, floodplain, or marine) or crushed stone, whereas coarse aggregates consist of one or a combination of gravels or crushed stone.

Sand is further subdivided into: Coarse sand: 4.5–2.0 mm..

What are the sources of fine aggregate?

River sand or machine sand, crushed stone sand, crushed gravel sand are the major sources of fine aggregate. Dolomite aggregates, crushed gravel or stone, natural disintegration of rock are the major sources of coarse aggregate. The surface area of fine aggregates is higher.

What is the maximum size of fine aggregate?

Typically, coarse aggregate sizes are larger than 4.75 mm (5 mm in British code), while fine aggregates form the portion below 4.75 mm. A maximum size up to 40 mm is used for coarse aggregate in most structural applications, while for mass concreting purposes such as dams, sizes up to 150 mm may be used.

Is code for testing of fine aggregate?

of particle size distribution of fine, coarse and all-in-aggregates by sieving or screening. to IS : 460-1962 Specification for Test Sieves ( Revised) shall be used. 2.2. 2 Balance – The balance or scale shall be such that it is readable and accurate to 0.1 percent of the weight of the test sample.

What size is type 2 aggregate?

Like Type 1 MOT, Type 2 MOT is an approved granular subbase material made of crushed stone such as limestone or granite with a size of 40 mm down to dust. The difference is that Type 2 MOT contains more dust than Type 1, being composed of fewer angular aggregate sizes (also known as scalpings).

What is fine aggregate test?

Field Tests for AggregateSurface Moisture Content & Absorption. The surface moisture in the aggregate, influences the water cement ratio, strength and durability of the mix. … Silt Content Test for Sand. Silt content test. … Bulking of Sand. … Sieve Analysis. … Fineness Modulus.

What are the types of fine aggregate?

Types of Fine AggregateCoral Sand.Glass Sand.Immature Sand.Gypsum Sand.Ooid Sand.Silica Sand.Pit Sand.River Sand.More items…

What is size of fine aggregate?

– Coarse aggregates are particulates that are greater than 4.75mm. The usual range employed is between 9.5mm and 37.5mm in diameter. – Fine aggregates are usually sand or crushed stone that are less than 9.55mm in diameter. Typically the most common size of aggregate used in construction is 20mm.

Are sieves fine aggregates?

The sieves normally used are the standard 8 inch (200 mm) sieves. With Fine Aggregate the coarse sieve or the 3/8” (9.5 mm) sieve at the top; each sieve below is finer; and the finest sieve, a No. 200 (75 µm) is at the bottom. A pan is placed below to retain any fine material that may pass this sieve.

Which aggregate is used in RCC?

Generally the 9.5-37.5 mm diameter range aggregate are used in RCC concrete work. But Maximum size of aggregate generally on site used are 40 mm. For ease of compaction and workability sometimes on site 10-15 mm aggregate are used.

What is meant by fine aggregate?

Fine aggregates generally consist of natural sand or crushed stone with most particles passing through a 3/8-inch sieve. Coarse aggregates are any particles greater than 0.19 inch, but generally range between 3/8 and 1.5 inches in diameter.

What are the different sizes of aggregate?

SIZES OF AGGREGATEStone Dust: 0.5mm – 5mm.Coarse Sand: 0.5mm – 2mm.Medium Sand: 0.25mm – 0.5mm.Fine Sand: 0.06mm – 0.25mm.Silt: 0.002mm – 0.06mm.Clay: < 0.002mm.Fine gravel: 4mm – 8mm.Medium gravel: 8mm – 16mm.More items...•

Why is aggregate used?

Aggregate, in building and construction, material used for mixing with cement, bitumen, lime, gypsum, or other adhesive to form concrete or mortar. … The aggregate gives volume, stability, resistance to wear or erosion, and other desired physical properties to the finished product.

How do you test fine aggregates?

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).

What size is #57 aggregate?

A #57 aggregate (combining the gradation of #5 and #7 aggregates) ranges from 1 to 0.19 inch (No. 4 sieve—25 to 4.75 mm) and has the following gradation (amounts finer than the given sieve size): 1½-inch sieve—100% passing; 1-inch—95 to 100%; ½-inch—25 to 60%; No.