Natural Cement Clinker Ground
Ground natural cement is produced from argillaceous limestone kilns, providing hydraulic setting similar to Roman concrete. It is used in sustainable historic restoration projects. This product is classified under 2523.90.00 as 'other hydraulic cements' because it is a natural hydraulic cement, distinct from synthetic Portland cement.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the cement is in clinker form
Cement clinkers are classified separately under heading 2523.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the cement is not calcined or subjected to processing beyond grinding, as per Chapter 25 Note 1
• Provide documentation showing the cement's natural origin and hydraulic properties
• Check if the product is in clinker form, which would require classification under 2523.10.00
Related Products under Tariff item 2523.90.00
Calcium Aluminate Cement
Calcium aluminate cement is a hydraulic binder made from limestone and bauxite, offering high early strength and resistance to chemical attack. It sets and hardens through hydration reactions, distinct from Portland cement, and is used in refractory and rapid-repair applications. This product falls under tariff item 2523.90.00 as 'other hydraulic cements' because it is not a Portland, aluminous, slag, or supersulphate cement.
Colored Hydraulic Lime Cement
Colored hydraulic lime cement is a hydraulic binder mixed with iron oxide pigments for aesthetic restoration projects. It sets through hydration of free lime and other compounds, providing a durable, breathable material. This product is classified under 2523.90.00 as 'other hydraulic cements' because it is not a standard Portland or aluminous cement, and the added pigments do not exclude it from Chapter 25.
Expansive Hydraulic Cement
Expansive hydraulic cement is formulated with ettringite-forming agents to compensate for shrinkage in concrete, ensuring crack control in prestressed structures. It hardens through hydration, similar to other hydraulic cements, but has unique expansive properties. This product is classified under 2523.90.00 as 'other hydraulic cements' because it does not fit the definitions of Portland, aluminous, slag, or supersulphate cements.
High Alumina Cement
High alumina cement is a hydraulic binder made from bauxite and limestone, known for rapid hardening and high-temperature resistance. It sets and hardens in air or underwater through hydration of calcium aluminates. This product is classified under 2523.90.00 as 'other hydraulic cements' because it is not a Portland cement, and while it is aluminous, it is not specifically classified under the aluminous cement subheading if it does not meet the exact definition.
Masonry Hydraulic Cement
Masonry hydraulic cement is a blend of natural cement and limestone, designed for tuckpointing and restoration work, setting hydraulically. It provides a durable, breathable mortar that matches historic structures. This product is classified under 2523.90.00 as 'other hydraulic cements' because it is not a standard Portland cement and has unique properties for masonry applications.
Pozzolanic Hydraulic Cement Blend
Pozzolanic hydraulic cement blend consists of Portland clinker (less than 50%), fly ash, and gypsum, setting through pozzolanic reactions. It offers a low-carbon alternative for sustainable construction. This product is classified under 2523.90.00 as 'other hydraulic cements' because it does not meet the definition of Portland cement due to the low clinker content.