Crushed Limestone Aggregate
Crushed limestone pieces typically ranging from 3/8 inch to 1 inch in size, used primarily as concrete aggregate in construction projects. This product falls under HTS 2517.10.00.20 as it is broken or crushed limestone, excluding pebbles and gravel, commonly used for concrete production. It meets the chapter note prioritizing heading 2517 for such stone materials.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily used as flux in steelmaking
Limestone flux for metallurgical processes falls under heading 2521, distinguished by end use rather than form.
If ground into fine powder for industrial fillers
Finely ground limestone powder may classify under 2530 as mineral substances not elsewhere specified.
If shaped into marble chips or mosaic pieces
Worked or shaped limestone products become worked monumental stone under Chapter 68.
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Import Tips & Compliance
• Verify particle size distribution via sieve analysis certificates to confirm exclusion from pebbles/gravel subheadings; ensure bill of lading specifies 'crushed limestone for concrete aggregate'; watch for misclassification as fluxing limestone under 2521
Related Products under HTS 2517.10.00.20
Limestone Road Base Material
Crushed and screened limestone (minus 2 inches), used as base material for road construction and paving projects. Classified under HTS 2517.10.00.20 as crushed limestone for road metalling, distinct from natural pebbles or gravel. Chapter notes confirm priority classification in 2517 over other headings.
Limestone Railway Ballast
Hard, crushed limestone rocks sized 1.5-3 inches for use as railway track ballast to provide drainage and stability. This fits HTS 2517.10.00.20 as crushed limestone for railway ballast, excluding gravel forms. Chapter priority rules place it definitively in 2517.
Screened Limestone Chippings
Angular limestone chippings (3/4 inch minus) used in asphalt mixes and landscaping drainage. Under HTS 2517.10.00.20 as processed limestone granules/chippings of heading 2515 stone, not pebbles. Exclusions from other chapters ensure 2517 classification.
Limestone Concrete Riprap
Large crushed limestone boulders (6-18 inches) used for erosion control in concrete structures and waterways. Classified in HTS 2517.10.00.20 as broken/crushed limestone for concrete aggregates or ballast. Chapter note (a) exclusions do not apply to this crude form.
Crushed Limestone Drainage Stone
Clean, crushed limestone (1-2 inches) for French drains and septic systems in construction. HTS 2517.10.00.20 covers this as crushed stone for concrete aggregates or similar uses, excluding gravel. Priority chapter note keeps it from other mineral headings.
Limestone Asphalt Aggregate
Screened crushed limestone fines and coarse (minus 1/2 inch to 3/8 inch) for hot mix asphalt production. Falls under HTS 2517.10.00.20 as limestone crushed stone for road metalling. Distinguished from powder/granules by typical aggregate sizing.