Stone 16×22 factory run mesh 18x25mm

Characteristic
Application
Mechanical properties
Technical requirements and applicable standards
Advantages and disadvantages
Compare
How to choose and preserve
Conclude

16×22 stone is a type of crushed stone with particle size from 16 mm to 22 mm, used as a large aggregate in asphalt concrete (Asphalt Concrete – AC).

This type of stone is crushed from natural stones such as granite, basalt or limestone, has high durability and ensures good bearing capacity when mixed with asphalt.

Characteristics of 16×22 stone

Grain size: 16 – 22 mm.
Shape: Angular, helps increase adhesion to asphalt.
Fine grain content: Low, ensuring suitable porosity.
High hardness, good bearing capacity, less wear when bearing heavy loads.
Color: Gray, black depending on the type of original stone (granite, basalt, lime).

1. Main ingredients in asphalt concrete mixture

16×22 stone is a large aggregate, which helps increase the durability and load-bearing capacity of asphalt concrete.
Used in hot asphalt concrete, medium-grain and coarse-grain asphalt concrete.

2. Road construction

Used as a load-bearing asphalt pavement layer.
Applied in highways, airports, ports…

3. Stabilize the road surface structure

Helps increase the load-bearing capacity and anti-sagging of the road surface.
Supports against cracking and rutting.

1. Standard grain composition (TCVN 8819:2011)

Sieve size (mm)	Screen passing rate (%)
22.4	100
19.0	90 – 100
16.0	50 – 85
9.5	10 – 35
4.75	0 – 10

2. Important physical and mechanical indicators

Indicators	Standard values
Compressive strength	≥ 80 MPa (depending on type stone)
Los Angeles (LA) wear and tear	≤ 35%
Impact (AI)	≤ 30%
Content of dust, silt, clay	≤ 1%
Water absorption	≤ 2%
Proportion of flat and diamond seeds	≤ 15%

TCVN 8819:2011 – Requirements for hot mix asphalt concrete.
TCVN 7570:2006 – Standard for coarse aggregate in concrete.
ASTM D692/D692M – American standard for asphalt concrete aggregate.

1. Advantages

Good load-bearing capacity – High strength, suitable for highways and airports.
Increased adhesion to asphalt – Thanks to the angular shape.
Anti-cracking of the road surface – Helps reduce rutting of wheel tracks.
High durability – Less wear under heavy loads.

2. Disadvantages

More difficult to construct than small stones, requiring specialized asphalt spreading equipment.
Higher cost than smaller stones (9.5 mm, 12.5 mm).
Requires strict quality control, ensuring suitable particle composition.

Properties	Stone Dmax 25	Stone Dmax 37.5	Dmax 19 Stone	Stone Dmax 9.5
Maximum grain size	22 mm	12.5 mm	9.5 mm	4.75 mm
Main applications	Highway and airport surfaces	Automobile roads, streets	Internal roads, low-rise roads	Surface asphalt layer
Resistance load	Very tall	High	Medium	Low
Porosity	Medium	High	Very tall	Very tall

1. Selection criteria

Uniform size, limiting particles that are too small or too large.
High hardness, limiting breakage when bearing load.
High cleanliness, does not contain mud, clay, or fine dust.

2. Storage and transportation

Do not mix with other types of stone, avoiding affecting the grading.
Store in a dry place, avoiding contamination from soil and sand.
Transport properly, limiting breakage of stone particles.

16×22 stone is an important type of stone in asphalt concrete structure, helping to increase bearing capacity, prevent subsidence and cracking and prolong the life of the road surface.

Main application: Highway, airport, port, bridge and road surface.
Applicable standards: TCVN 8819:2011, ASTM D692/D692M.
Notes when using: Ensure the particle composition meets the standards, check the cleanliness before construction.

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