Tarred macadam

HS v2022 Code: 251730

About tarred macadam

HS code 251730 covers tarred macadam, a type of paving material that has been widely used in road construction and maintenance for decades. Tarred macadam is a mixture of crushed stone or gravel, bound together with a tar-based binder, creating a durable and weather-resistant surface. This industry plays a crucial role in the development and upkeep of transportation infrastructure, supporting economic growth and facilitating the movement of goods and people across regions.

Production process

The production of tarred macadam involves several key steps. First, the raw materials, including crushed stone or gravel and the tar-based binder, are carefully selected and prepared. The stone or gravel is then heated and mixed with the hot, liquefied binder, creating a homogeneous mixture. This mixture is then laid and compacted on the desired surface, forming a smooth and cohesive pavement. The final step involves the application of a top layer of fine aggregate, which helps to improve the surface texture and traction.

Production inputs

The main inputs required for the production of tarred macadam include crushed stone or gravel, tar-based binders, and specialized equipment such as asphalt pavers and rollers. The quality and properties of the raw materials, as well as the efficiency of the production equipment, are critical factors in determining the overall performance and durability of the final product.

Production outputs

Tarred macadam is primarily used as a paving material for roads, highways, and other transportation infrastructure. Its output is often consumed by 230110 Road and railway construction materials, 230120 Bituminous mixtures based on natural and artificial mineral substances and bitumen, natural asphalt, or related substances as a binder, and 230130 Bituminous mixtures based on coal tar or on pitch and pitch tar, among other related industries.

Revisions to 251730

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 251730. The most recent 1 version of this code (251730) is in the HS v2022 system (this version):

This page shows the most recent version of code 251730.

Older versions

Family tree for tarred macadam

    graph LR
    A["<a href='/classifications/hs/v2022/25'>25: Salt; sulphur; earths, stone; plastering materials, lime and cement</a>"]
A --> B["<a href='/classifications/hs/v2022/2517'>2517: Pebbles, gravel, crushed stone for concrete aggregates for road or railway ballast, shingle or flint; macadam of slag, dross etc tarred granules, chippings, powder of stones of heading no. 2515 and 2516</a>"]
B --> C["<a href='/classifications/hs/v2022/251730'>251730: Tarred macadam</a>"]

    B --> D["<a href='/classifications/hs/v2022/251710'>251710: Pebbles, gravel, broken or crushed stone; of a kind commonly used for concrete aggregates, for road metalling or for railway or other ballast, shingle and flint, whether or not heat-treated</a>"]
B --> E["<a href='/classifications/hs/v2022/251720'>251720: Macadam of slag, dross or similar industrial waste; whether or not incorporating the materials in Tariff item 2517.10.00</a>"]
B --> F["<a href='/classifications/hs/v2022/251741'>251741: Stones; of marble, in granules, chippings and powder, whether or not heat-treated</a>"]
B --> G["<a href='/classifications/hs/v2022/251749'>251749: Stones; of heading no. 2515 or 2516 (excluding marble), in granules, chippings and powder, whether or not heat-treated</a>"]

    

    %% Color coordination by level

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level6
class D level6
class E level6
class F level6
class G level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight