Chapter 25 — Salt; sulfur; earths and stone; plastering materials, lime and cement

Heading 2517 — 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 heattreated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 25.15 or 25.16, whether or not heattreated.

Subheading 2517.20 — Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10