The Different Types Of Aggregate. The categories of aggregates include gravel, sand, recycled concrete, slag, topsoil, ballast, Type 1 MOT, and geosynthetic aggregates (synthetic products commonly used in civil engineering projects used to stabilise terrain).

Procedure for Compacted Bulk Density. Measure the volume of the cylindrical metal measure by pouring water into the metal measure and record the volume “V” in litre. Fill the cylindrical metal measure about one-third full with thoroughly mixed aggregate and tamp it 25 times using tamping bar.

10mm Recycled Aggregate is comprised of deposits of mainly, brick, rock, tiles and demolition concrete, that are crushed and screened to a nominal size of 10mm. It is known as a minimal fines product as the screening process separates most of the fine residue from the aggregate.

So density of aggregate is not fix but it ranging between 1420 kg/m3 to 1680 kg/m3. weight of aggregate in kilogram depends on density of aggregate and size of aggregate.

Density of 10mm,20mm and 40mm aggregate ranging between 1420 kg/m3 to 1680 kg/m3, consider density of 10mm,20mm & 40mm aggregate is equal to 1680 kg/m3, 1550kg/m3 & 1450 kg/m3 respectively.

for example a graded aggregate of nominal size 20 mm means an aggregate most of which passes 20 mm IS sieve. For example 20 mm single size aggregate mean an aggregate most of which passes 20 mm IS sieve and its major portion is retained on 10 mm IS sieve.

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.

Aggregate Size Nominal Maximum Size: The smallest sieve opening through which the entire amount of aggregate is permitted to pass. coarse aggregate MUST pass the 1.5” sieve but 95 – 100% MAY pass the 1” sieve, therefore # 57 aggregate is considered to have a Maximum size of 1.5” and an Nominal Maximum size of 1”.

The most popular field test to measure the quality of aggregate is the sieve test. It is not possible to measure shape characteristic and other parameters by sieve analysis. Therefore, it is essential to develop rapid assessment techniques for quality control of aggregate.

The surface area per unit weight of the material is termed as specific surface. This is an indirect measure of the aggregate grading. Specific surface increases with the reduction in the size of aggregate particle. The specific surface area of the fine aggregate is very much more than that of coarse aggregate.

The surface area for the aggregate is determined by multiplying the percent passing a given sieve by the surface area factor. These factors are from the Asphalt Institutes MS-2 Manual and are listed below. The surface area is determined for each sieve size and then summed to calculate a total surface area.

Length in feet x Width in feet x Depth in feet (inches divided by 12). Take the total and divide by 21.6 (the amount of cubic feet in a ton). The final figure will be the estimated amount of tons required.

Ton Register to Cubic Yard Conversion Table

1 cubic yard of gravel weight is 2800 lb, in United States, 1 ton of gravel is equal to 2000 pounds, convert tons of gravel to cubic yards = 2000/2800 = 0.714 cubic yards, so there are 0.714 cubic yards in a ton of gravel.

A US ton is 2000 lb. 2000 lb / 534lb per wheelbarrow = 3.75 wheel barrows per ton.