Asphalt
Testing Gilsonite-Modified Asphalt Binder in the Lab
Before using gilsonite on a paving project, the modified binder should be tested to confirm the target properties.…
Gilsonite Asphalt Modification
How gilsonite modifies asphalt binder: dosage, PG grades, rutting resistance, mix design and plant handling.
Asphalt
Gilsonite in Asphalt: Frequently Asked Questions
How much gilsonite should I add? Usually 4–12% by weight of binder, or 0.3–0.8% of the total mix.…
Asphalt
Cost–Benefit of Gilsonite-Modified Asphalt
Road agencies and contractors want to know: is gilsonite worth the extra cost? If a modified pavement lasts…
Asphalt
Gilsonite in Mastic Asphalt and Guss Asphalt
Mastic asphalt (also called guss asphalt) is a dense, void-free mix poured hot and used on bridge decks,…
Asphalt
Gilsonite, Adhesion and Moisture Damage in Asphalt
Stripping — the loss of bond between binder and aggregate in the presence of water — causes ravelling…
Asphalt
Handling Gilsonite at the Asphalt Plant
Adding gilsonite at the plant is simple if a few practical steps are followed. Allow a few extra…
Asphalt
Mix Design Tips for Gilsonite-Modified Asphalt
Designing a gilsonite-modified mix follows normal Marshall or Superpave procedures, with a few extra points. Test softening point,…
Asphalt
Fuel Resistance of Gilsonite-Modified Asphalt
Fuel and oil spills soften ordinary asphalt, causing ravelling and potholes at gas stations, bus depots and airports.…
Asphalt
Gilsonite Asphalt for Airports and Heavy-Duty Pavements
Airport aprons, container terminals and industrial yards carry very heavy, slow or stationary loads. These pavements need extra…
Asphalt
Gilsonite Asphalt for Hot-Climate Roads
In the Middle East, North Africa and other hot regions, pavement temperatures can exceed 70°C in summer. Standard…
Asphalt
Gilsonite in Mixes with Recycled Asphalt (RAP)
Recycled asphalt pavement (RAP) saves money and resources, but its aged binder can make mixes stiff and brittle.…
Asphalt
Gilsonite and Superpave Performance Grades (PG)
The Superpave performance grade system describes binders by the temperatures at which they perform. For example, PG 64-22…
Recommended product
Data sheet
Asphalt Modifier Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black powder or granules | Visual |
| Softening point (R&B) | 150 – 200 °C | ASTM D36 |
| Ash content, max | 8 % | ASTM D3174 |
| Moisture, max | 1 % | ASTM D95 |
| Solubility in TCE, min | 95 % | ASTM D2042 |
| Specific gravity @ 25°C | 1.04 – 1.10 | ASTM D70 |
| Particle size | Powder ≤ 200 mesh / granular 1–5 mm | Sieve |
| Typical dosage | 4 – 12 % by weight of binder | |
| Packing | 25 kg bags, meltable bags or 1 MT jumbo bags. | |
Typical values. The final specification is confirmed in the COA of each shipment.