Construction Aggregates (Gabbro, Granite & Armour Rock)

Gabbro, granite and armour rock in Supramax lots

Aggregates under HS 2517.10 are sold on mechanical performance, not chemistry, and every ready-mix, asphalt and marine contractor has the same short list of tests. Los Angeles abrasion (≤ 25–30% for concrete and asphalt wearing course, ≤ 40% for sub-base) says whether the stone will break down under the mixer and under traffic; aggregate crushing value and aggregate impact value (≤ 25–30%) say much the same in the BS system. Flakiness and elongation indices (≤ 20–25%) decide workability in concrete and interlock in asphalt; water absorption (≤ 1–2%) predicts freeze-thaw and asphalt binder demand; and soundness (≤ 12% magnesium sulphate) catches stone that looks fine and weathers to mud. Chloride (≤ 0.01–0.03%) and sulphate (≤ 0.2–0.4%) limits protect reinforcing steel, which is why washed, low-salt gabbro and granite hold a premium over coastal limestone in the Gulf. Gradation is contracted to the buyer's standard: 5–10, 10–20 and 20–40 mm single-size for concrete, 0–5 mm crusher dust and manufactured sand, 0–40 mm sub-base and, at the heavy end, 1–3 t and 3–6 t armour rock and core rock for breakwaters and reclamation.

This is the most freight-dominated cargo we handle. UN Comtrade, 2025 export declarations: Oman exported 12.02 million MT of HS 2517 at USD 6/MT FOB, Indonesia 9.20 million MT at USD 7, Malaysia 5.90 million MT at USD 9, India 4.99 million MT at USD 13, Canada 9.24 million MT at USD 17. A Supramax of Omani gabbro is worth roughly USD 300,000 loaded and the voyage to the Indian subcontinent, Bangladesh, the Maldives or East Africa is a multiple of that, so a good aggregate deal is a good freight deal: geared tonnage for ports without shore cranes, self-trimming holds, laytime that matches the quarry's loading rate, and a discharge berth draft that lets you fill the ship. CBIL is a commodity brokerage company that also runs a chartering desk (LaycanDesk), and Oman boulder and armour-rock cargoes are on our book now. We place the stone against SGS or Intertek test certificates (LA, ACV, flakiness, absorption, chloride, sulphate, gradation) on FOB, CFR and CIF terms in Handymax and Supramax parcels of 30,000–58,000 MT, and the stone and the ship are quoted together. Send your standard (BS, ASTM or EN), the sizes you need and the discharge port, and we work the quarry and the tonnage against them.

Need the ship as well? Our chartering desk prices bulk limestone, gypsum and aggregates freight on LaycanDesk.