Masonry Hydraulic Cement
Masonry hydraulic cement blends natural cement with limestone for tuckpointing and restoration work, setting hydraulically. HTS 2523.90.00.00 covers this as other hydraulic cement, distinct from standard Portland. Colored variants for matching historic brickwork are common.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If quicklime-based without hydraulic set
Pure hydraulic limes are 2522.30; blended cements with clinker go to 2523.
If pre-mixed with aggregates for retail
Grouts and mortars mixed with sand classify in Chapter 32 as construction mastics.
If sold as sorbent or anti-pollution prep
Functional cement preparations shift to 3824 based on end-use.
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Import Tips & Compliance
• Document color additives and composition to prove hydraulic nature vs. lime putty
• Test for minimum compressive strength (300 psi in 28 days) per ASTM C91 standards
Related Products under HTS 2523.90.00.00
High Alumina Cement
High alumina cement is a hydraulic cement produced from bauxite and limestone, capable of setting and hardening underwater or in air due to its aluminous composition. It falls under HTS 2523.90.00.00 as 'other hydraulic cements' distinct from Portland, slag, or supersulfate types. Primarily used in refractory applications and rapid-strength concrete.
Calcium Aluminate Cement
Calcium aluminate cement is a specialized hydraulic binder with high early strength, made from limestone and alumina-bearing materials. Classified in HTS 2523.90.00.00 as other hydraulic cements, not fitting Portland or supersulfate categories. Ideal for sewer pipe linings and aggressive chemical environments.
Supersulfated Cement Powder
Though related to slag cements, certain supersulfated formulations with unique gypsum-calcium sulfate ratios qualify as 'other' under HTS 2523.90.00.00. This hydraulic cement develops strength through sulfate reactions, suitable for marine structures. Excluded from pure slag cement (2523.28) by composition specifics.
Roman-Type Hydraulic Cement
Replicated pozzolanic hydraulic cement using volcanic ash and lime, sets underwater like ancient Roman opus caementicium. HTS 2523.90.00.00 as other hydraulic due to blended hydraulic properties. Applied in marine and archaeological restoration.
Colored Hydraulic Lime Cement
Hydraulic lime cement with iron oxide pigments for aesthetic matching in restoration, hydraulically sets via free lime. Classed HTS 2523.90.00.00 as other colored hydraulic cement. Not excluded by chapter notes on earth colors.
Pozzolanic Hydraulic Cement Blend
Blend of Portland clinker (<50%), fly ash, and gypsum creating hydraulic set via pozzolanic reaction. HTS 2523.90.00.00 for such composite other hydraulics. Sustainable alternative for low-carbon concrete.