Other
Portland cement, aluminous cement, slag cement, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers. > Other hydraulic cements > Other
Duty Rate (from China)
Products classified under Tariff item 2523.90.00.90
Calcium Aluminate Cement
Calcium aluminate cement is a hydraulic binder produced from limestone and bauxite, known for its high early strength and resistance to chemical attack. It sets and hardens through hydration reactions, making it suitable for refractory and rapid-repair applications. This product falls under tariff item 2523.90.00 as an 'other hydraulic cement' because it is not classified as Portland, aluminous, slag, or supersulphate cement under the preceding specific headings.
2523.90.00Colored Hydraulic Lime Cement
Colored hydraulic lime cement is a hydraulic binder mixed with iron oxide pigments to achieve specific aesthetic shades for restoration projects. It sets through hydration of free lime and other compounds, providing a durable, breathable material. This product is classified under tariff item 2523.90.00 as 'other hydraulic cement' because it is not a standard Portland or aluminous cement and the added pigments do not exclude it from Chapter 25.
2523.90.00Expansive Hydraulic Cement
Expansive hydraulic cement is a specialized binder containing ettringite-forming agents that counteract shrinkage during curing, making it ideal for prestressed concrete and crack control. It hardens through hydration and expands slightly to improve structural integrity. This product falls under tariff item 2523.90.00 as 'other hydraulic cement' because its unique composition does not match the specific definitions of Portland, aluminous, slag, or supersulphate cement.
2523.90.00High Alumina Cement
High alumina cement is a hydraulic cement produced from bauxite and limestone, offering rapid hardening and high-temperature resistance. It sets and hardens both in air and underwater, making it suitable for refractory and marine applications. This product is classified under tariff item 2523.90.00 as 'other hydraulic cement' because it is not specifically listed as aluminous cement in the subheading, which covers only certain types.
2523.90.00Masonry Hydraulic Cement
Masonry hydraulic cement is a blend of natural cement and limestone, designed for tuckpointing and restoration work with hydraulic setting properties. It provides a durable, breathable mortar that hardens through hydration. This product falls under tariff item 2523.90.00 as 'other hydraulic cement' because it is not a standard Portland or aluminous cement and is distinct from other specific types.
2523.90.00Natural Cement Clinker Ground
Ground natural cement is produced from argillaceous limestone that is kiln-fired and ground, providing hydraulic setting similar to Roman concrete. It is a sustainable alternative for historic restoration and modern construction. This product is classified under tariff item 2523.90.00 as 'other hydraulic cement' because it is not a synthetic Portland or other specific type.
2523.90.00Pozzolanic Hydraulic Cement Blend
Pozzolanic hydraulic cement blend is a composite of Portland clinker (less than 50%), fly ash, and gypsum, which sets through pozzolanic reactions. It offers a low-carbon alternative for concrete production with good durability. This product falls under tariff item 2523.90.00 as 'other hydraulic cement' because its composition does not meet the specific definitions of Portland, aluminous, slag, or supersulphate cement.
2523.90.00Roman-Type Hydraulic Cement
Roman-type hydraulic cement is a replicated pozzolanic cement made from volcanic ash and lime, setting underwater like ancient Roman concrete. It is used in marine and architectural restoration due to its compatibility with historic materials. This product is classified under tariff item 2523.90.00 as 'other hydraulic cement' because it is a blended hydraulic binder not covered by specific cement types.
2523.90.00Sorel Cement Powder
Sorel cement powder is a magnesium oxide-based hydraulic cement that sets when mixed with a magnesium chloride solution, used for flooring and industrial applications. It is chemically distinct from traditional calcium-based cements but exhibits hydraulic properties. This product falls under tariff item 2523.90.00 as 'other hydraulic cement' because it is not excluded by Chapter 25 notes and is not classified under specific cement types.
2523.90.00Supersulfated Cement Powder
Supersulfated cement powder is a hydraulic cement that develops strength through sulfate reactions, typically composed of granulated blast furnace slag, calcium sulfate, and a small amount of Portland clinker. It offers good resistance to chemical attack and is used in marine and industrial environments. This product is classified under tariff item 2523.90.00 as 'other hydraulic cement' because it does not meet the specific definition of supersulphate cement under the subheading, which has distinct compositional requirements.