What is aggregate sieve analysis?
What is aggregate sieve analysis?
The sieve analysis determines the gradation (the distribution of aggregate particles, by size, within a given sample) in order to determine compliance with design, production control requirements, and verification specifications.
What is aggregate test?
Aggregate plays an important role in pavement construction. Aggregates are tested for strength, toughness, hardness, shape, and water absorption. In order to decide the suitability of the aggregate for use in pavement construction, following tests are carried out: Crushing test.
What is aggregate grading test?
Test aggregate to determine the quality of material. A gradation test measures the size distribution, or amount of coarse and fine aggregates in a sample. Use a sieve analysis to test gradation. Stack mesh screens, or sieves, in order by size.
Why we do sieve analysis of coarse aggregate?
A sieve analysis or gradation test determines the distribution of aggregate particles by size within a given sample. Data can also be used to better understand the relationship between aggregates or blends and to predict trends during production.
What is the size of aggregate?
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. A larger size, 40mm, is more common in mass concrete.
How do you analyze a sieve analysis?
The mass of the sample of each sieve is then divided by the total mass to give a percentage retained on each sieve. The size of the average particle on each sieve is then analysed to get a cut-off point or specific size range, which is then captured on a screen.
Is sieve for coarse aggregate?
Coarse aggregate means the aggregate which is retained on 4.75mm sieve when it is sieved through 4.75mm. To find fineness modulus of coarse aggregate we need sieve sizes of 80mm, 40mm, 20mm, 10mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm and 0.15mm.
Why sieve analysis test of aggregate is so important?
Performing a sieve analysis is important when analyzing materials because their particle size distribution can affect a wide range of properties such as the strength of concrete, the solubility of a mixture, their surface area properties and even their taste.
How to do a sieve analysis?
Taking the representative sample. Take the samples with a minimum of 25kg.
What is the Fineness modulus of fine aggregate?
Fineness modulus is generally used to get an idea of how coarse or fine the aggregate is. More fineness modulus value indicates that the aggregate is coarser and small value of fineness modulus indicates that the aggregate is finer.
What is gradation of aggregate?
Gradation and Size. The particle size distribution, or gradation, of an aggregate is one of the most influential aggregate characteristics in determining how it will perform as a pavement material. In HMA, gradation helps determine almost every important property including stiffness, stability, durability, permeability , workability,…
