What is the significance of ten percent fines value?

The ten per cent fines value is a widely used measure of the resistance of an aggregate to crushing under compressive load. It is frequently employed in assessing aggregates for highways construction and can be used with rocks of both high and low strength.

What are fine aggregates?

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 is the impact value of aggregate?

The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load.

What is ACV test?

The Aggregate Crushing Value (ACV) Test Set measures how resistant an aggregate is, when being crushed under a gradually applied compressive load. Each set consists of steel cylinder, plunger, base plate, cylindrical measure and tamping rod.

What is aggregate crushing value test?

The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggregate of aggregate crushing value 30 or higher, the result may be anomalous, and in such cases the ten percent fines value should be determined instead.

What is fine aggregate size?

– 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. Larger aggregate diameters reduce the quantity of cement and water needed.

What is the maximum size of fine aggregates?

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.

What is flakiness and elongation?

Flakiness Index is the percentage by weight of particles in it, whose least dimension (i.e. thickness) is less than three-fifths of its mean dimension. Elongation Index is the percentage by weight of particles in it, whose largest dimension (i.e. length) is greater than one and four-fifths times its mean dimension.

How is aggregate impact value expressed?

The aggregate impact value is expressed as the percentage of the fine passing 2.36 mm sieve formed in terms of the total weight of the sample.

Which type of aggregates gives good workability?

round aggregate
Which type of aggregates gives good workability? Explanation: The aggregates which gives more ease of working and workability is round aggregate, flaky and angular also used in some cases, irregular also are used in pavements.

What is ACV in aggregate?

Aggregate Crushing Value (ACV) Sets The Aggregate Crushing Value (ACV) Test Set measures how resistant an aggregate is, when being crushed under a gradually applied compressive load. Each set consists of steel cylinder, plunger, base plate, cylindrical measure and tamping rod.